Category: General Contractor Guide

In California, the down payment on a home improvement contract cannot exceed $1,000 or 10 percent of the contract price, whichever is less, and every payment after that must follow the work: a contractor may not collect for work not yet completed or materials not yet delivered. Both rules are in Business and Professions Code section 7159, apply to any home improvement contract over $500, and are enforced by the Contractors State License Board. Green Design and Build is a licensed, bonded and insured general contractor (CSLB #1110975) based in Van Nuys, serving homeowners across Los Angeles County, Orange County, Ventura County, western Riverside County and western San Bernardino County (Ontario, Rancho Cucamonga and neighbouring cities), and this guide explains how a legal payment schedule works, what a red flag looks like, and how we structure ours.

Who we are

Green Design and Build is led by Dekel Sofer. We hold a 4.7-star rating across 146 Yelp reviews and have completed hundreds of projects. Every one of them was paid for under the rules below, so we know them from the contractor’s side as well as the homeowner’s.

The $1,000 rule: what the law actually says

Business and Professions Code section 7159 governs every home improvement contract in California where the total price is more than $500. It requires the contract to be in writing, signed by both parties, with a copy handed to you before any work starts. On the money, three of its requirements matter most.

The down payment. The contract must state, in 12-point boldface, that “THE DOWNPAYMENT MAY NOT EXCEED $1,000 OR 10 PERCENT OF THE CONTRACT PRICE, WHICHEVER IS LESS.” The arithmetic is unforgiving: on a $6,000 bathroom refresh the cap is $600; on a $60,000 kitchen it is $1,000; on a $250,000 ADU it is still $1,000. There is no exception for custom cabinets, windows on order, or “materials.” The only contractors exempt from the cap are those who furnish a blanket performance and payment bond, or a bond equivalent or joint control approved by the CSLB registrar, covering full performance of the contract, and the contract has to say so.

Progress payments. If the contract calls for payments during the job, it must include a schedule that describes each phase of work and the dollar amount due for it, followed by another boldface statement: “IT IS AGAINST THE LAW FOR A CONTRACTOR TO COLLECT PAYMENT FOR WORK NOT YET COMPLETED, OR FOR MATERIALS NOT YET DELIVERED.” Section 7159.5 puts it the other way round: except for the down payment, a contractor “shall neither request nor accept payment that exceeds the value of the work performed or material delivered.” Materials count only once they are on your property, so a payment “for the cabinets” is legal when the cabinets are in your garage, not when they are ordered.

The penalty. Taking a down payment over the cap, or a payment ahead of the work, is a misdemeanor under section 7159.5, punishable by a fine of $100 to $5,000, up to a year in county jail, or both, on top of CSLB discipline against the licence. CSLB has issued industry bulletins and consumer alerts on exactly this point, including a 2024 alert about ADU deposits.

A payment schedule that follows the work

A legal schedule has three parts: the capped down payment, progress payments tied to phases you can see finished, and a final payment when the job is done. Here is what one looks like on a permitted kitchen remodel; the phases change with the project, and the dollar amount against each one is whatever that phase is worth in the contract price.

Payment	Due when	What you should be able to verify before paying
Down payment	On signing	The amount is $1,000 or 10 percent, whichever is less
Progress payment 1	Demolition complete and rough plumbing and electrical passed inspection	Inspection sign-off on the permit card
Progress payment 2	Drywall, texture and paint complete	Rooms closed up and painted
Progress payment 3	Cabinets delivered and installed	Cabinets on the wall
Progress payment 4	Countertops, tile and fixtures installed	Working sink, cooktop and lights
Final payment	Final inspection passed, walkthrough and punch list complete, lien releases received	Signed final on the permit, your own walkthrough, unconditional final releases

Two features make this schedule work. Each payment lands after something is finished that you can walk in and look at, and the phases line up with the building department’s inspections, so the inspector’s sign-off is your evidence that the work is really done. On an addition or an ADU the phases follow the structure: foundation, framing, rough trades, insulation and drywall, finishes, final. Our post on how to hire a general contractor without getting scammed describes the same structure: a legal deposit, progress payments tied to completed milestones, written confirmation before each payment, and a reasonable final balance held until the walkthrough and punch list are complete.

Retention and the final payment

Retention is money withheld from each progress payment, or held back at the end, until the work is complete and accepted; it appears on some larger residential contracts. California’s prompt-payment law for private work, Civil Code section 8812, requires an owner who has withheld retention to pay it within 45 days after completion of the work, and lets the owner hold back no more than 150 percent of any amount in a good-faith dispute. On most residential remodels there is no formal retention; the final payment is the holdback. Do not release it until the final inspection has passed, you have walked the job with the contractor and the punch list is done, and you have the lien releases described next.

Lien releases: conditional, unconditional, progress and final

Anyone who supplies labor or materials to your project and is not paid can record a mechanics lien against your house, even if you paid the general contractor in full. That is why section 7159 requires every home improvement contract to carry a “Mechanics Lien Warning” that explains preliminary notices (subcontractors and suppliers may send one within 20 days of starting) and how to protect yourself. The protection is the lien release, and California prescribes four statutory forms in Civil Code sections 8132 to 8138.

Form	Civil Code section	When it is used
Conditional waiver and release on progress payment	8132	The contractor or sub has not yet been paid for this progress payment; the release takes effect only when the check clears
Unconditional waiver and release on progress payment	8134	The progress payment has already been received
Conditional waiver and release on final payment	8136	The final payment has not yet been paid; effective on receipt
Unconditional waiver and release on final payment	8138	The final payment has been received; all lien rights are waived

These are typical Los Angeles budgeting estimates, not a price list or a quote. Your project can come in lower or higher depending on the house, the scope and the finishes; the only real number is a written proposal after a site visit.

The sequence that protects you is simple. Before each progress payment, collect a conditional release from the general contractor and from any subcontractor or supplier who sent a preliminary notice, then pay. After the payment clears, collect the unconditional version. At the end, the unconditional final release from everyone closes the door. A conditional release is binding only with evidence of payment, such as the endorsed check, so it costs the contractor nothing to sign one before the money moves; a contractor who refuses is telling you something. A release that does not follow the statutory form is unenforceable, and an unconditional release waives lien rights even if the signer has not actually been paid, which is why no one should sign one before the check clears. CSLB publishes all four forms.

Change orders

Section 7159 requires the contract to state that extra work and change orders become part of the contract once they are prepared in writing and signed by both parties before the work they cover begins. That sentence is the whole rule: no verbal “we found rot, that’s another $3,500,” no invoice at the end for work you did not agree to in writing. A proper change order states the scope, the price or credit, and the effect on the schedule, and payment for it follows the same law as everything else: due when the extra work is done, not when it is signed, except that custom-ordered material such as a special window is billable on delivery.

What a red flag looks like

• A deposit over $1,000. “Half down to order materials” is the most common illegal request in California remodeling. The contractor may need to buy cabinets; the law says they finance that, not you, unless they are bonded for it and the contract says so.
• Cash only, or a discount for cash. A licensed, bonded contractor has no reason to avoid a paper trail, and cash leaves you without proof for a CSLB complaint.
• Payments on dates rather than milestones. “$10,000 every two weeks” is not a schedule of progress payments; it is a loan to the contractor.
• No written change-order process, or extras quoted verbally and billed on the spot.
• No lien release offered, or a refusal to sign a conditional release before payment.
• A licence number you have not checked. Look it up on the CSLB site; confirm the classification matches the work, the bond is active and workers’ compensation is on file. Our guide to verifying a contractor’s licence and certifications walks through it.

Our hiring post tells the story of what happens when all six line up. A homeowner chose a $28,000 kitchen bid over two at about $45,000, paid $16,800 up front “to order materials” (60 percent of the contract, against a legal cap of $1,000), then agreed verbally to $4,000 for a panel upgrade and $3,500 for subfloor rot. The contractor stopped showing up at about 60 percent complete with about $24,000 paid; the licence number belonged to an expired plumbing licence, and no electrical permit had been pulled. She paid a second contractor at market rate to finish, plus permit corrections.

Your right to cancel

A home improvement contract you sign at your home carries a right to cancel within three business days, in writing, with no penalty; the period is five business days if you are 65 or older, and seven for repairs after a declared disaster. The contract must carry the notice in boldface next to the signature line with a detachable cancellation form, and the contractor must refund any payment within ten days of a cancellation. The right does not apply to contracts signed at the contractor’s place of business.

How Green Design and Build structures payment

Our process starts with a site visit of about two hours, after which you receive a design direction and a clear, itemized proposal, usually within about 48 hours. The proposal lists the scope, the allowances for selections you have not made yet, and the payment schedule, so the money question is answered before you sign. The down payment is $1,000 or 10 percent, whichever is less. After that, payments follow the work in milestones you can see finished, and changes go through a written change order signed before the work begins. Small jobs that do not need a permit, such as painting or flooring, can usually be scheduled within a few days of signing; permitted projects start once the city issues the permit. Our labor is warranted for one year from completion, which our warranty page explains, and we offer financing through Synchrony, Service Finance and Home Run Financing, with terms set by the lender and your credit approval. Our post on why ADU quotes vary so much between contractors shows what an itemized proposal protects you from: a garage conversion quoted at about $85,000 that rose to about $130,000 as unpriced work surfaced.

Where we do this work

The payment rules in this guide are state law, so they are the same in every city we serve: the San Fernando Valley and the rest of Los Angeles County, Orange County, Ventura County, western Riverside County and western San Bernardino County. What changes from place to place is the inspection sequence the milestones follow, since LADBS, the county building divisions and each city’s building department run their own inspections, and the HOA sign-offs some Orange County and Inland Empire communities require before a final. Every city and county we serve is on our service areas page.

Contractor payment FAQs

How much deposit can a contractor ask for in California?

A contractor in California may not ask for a down payment of more than $1,000 or 10 percent of the contract price, whichever is less, on any home improvement contract over $500 (Business and Professions Code section 7159). On a $60,000 kitchen remodel the legal maximum is $1,000. The only exception is a contractor who furnishes a blanket performance and payment bond or a CSLB-approved equivalent, which the contract must state.

Is a 50 percent deposit legal for a remodel in California?

No. A 50 percent deposit on a home improvement contract is illegal in California unless the contractor furnishes a performance and payment bond or CSLB-approved bond equivalent covering the full contract. Requesting or accepting a down payment over the $1,000 or 10 percent cap is a misdemeanor under Business and Professions Code section 7159.5, with a fine of $100 to $5,000 and up to a year in jail, and grounds for CSLB discipline.

How do progress payments work on a construction contract?

Progress payments on a California home improvement contract are listed in a schedule that names each phase of work and the amount due when it is complete, and the law forbids a contractor from collecting for work not yet completed or materials not yet delivered to the site. A sound schedule ties each payment to a finished, visible milestone, usually one the building inspector has just signed off, and holds a final payment until the final inspection, the walkthrough and the punch list are done.

What is a conditional lien release?

A conditional lien release is a statutory California form (Civil Code section 8132 for a progress payment, 8136 for final payment) that a contractor, subcontractor or supplier signs before being paid; it waives their right to lien your property, but only takes effect once the payment is actually received. An unconditional release (sections 8134 and 8138) is signed after payment and waives lien rights outright. Collect conditional releases before each payment and unconditional ones after the check clears.

Can a contractor charge for a change order before doing the work?

A change order in California must be in writing and signed by both parties before the extra work begins, and it becomes part of the contract when it is. Payment for it follows the same rule as the rest of the contract: it is due when the extra work is performed or the material is delivered, not when the change order is signed, apart from custom-ordered items that are billable on delivery.

When should I make the final payment to a contractor?

Make the final payment on a California remodel after the final inspection has passed, you have walked the finished work with the contractor and the punch list is complete, and you hold unconditional final lien releases from the contractor and from every subcontractor or supplier who sent a preliminary notice. If the contract withheld a formal retention, the owner must pay it within 45 days of completion under Civil Code section 8812, less up to 150 percent of any amount in good-faith dispute.

Get a proposal with the payment schedule written into it

Tell us about your project and we will come out for a site visit of about two hours, then send an itemized proposal, usually within 48 hours, that lists the scope, the allowances, the milestones and a down payment of $1,000 or 10 percent, whichever is less. Read it at home; the three-day right to cancel is printed on it.

Building a house in Los Angeles typically costs $300 to $600 per square foot all-in, so a 2,000 square foot house is roughly $600,000 to $1,200,000 before the lot, with hillside sites and custom finishes taking it higher. Green Design and Build is a licensed, bonded and insured general contractor (CSLB #1110975) based in Van Nuys, serving homeowners across Los Angeles County, Orange County, Ventura County, western Riverside County and western San Bernardino County (Ontario, Rancho Cucamonga and neighbouring cities). These are typical Los Angeles budgeting estimates, not a price list or a quote; your project can come in lower or higher depending on the lot, the scope and the finishes, and the only real number is a written proposal after a site visit.

Who we are

Green Design and Build is led by Dekel Sofer. We hold a 4.7-star rating across 146 Yelp reviews and have completed hundreds of projects, and one company carries a new house from the first zoning check to the certificate of occupancy. Our new home construction page covers how we build; this guide is about the money.

Cost to build a house in Los Angeles per square foot

Our guide to what a Los Angeles general contractor costs puts remodeling and addition work at $150 to $450 per square foot. Building new costs more per square foot than remodelling, because every square foot involves site work, foundation, framing, roof, exterior, systems and finish, and nothing existing is reused.

House size	At $300 per sq ft (bottom of the range)	At $600 per sq ft (top of the range)
1,500 sq ft	$450,000	$900,000
2,000 sq ft	$600,000	$1,200,000
2,500 sq ft	$750,000	$1,500,000

These are typical Los Angeles budgeting estimates, not a price list or a quote. Your project can come in lower or higher depending on the house, the scope and the finishes; the only real number is a written proposal after a site visit.

Read the table from the right. The bottom of the range describes simpler remodeling work, not a house built from a bare lot; a new home on a flat Valley lot with standard finishes belongs in the upper half, and a hillside house with caissons and retaining walls, or one with custom millwork and stone, goes past $450. The number excludes the land.

Hard costs and soft costs

Hard costs are the physical house: demolition and grading, foundation, framing, roof, windows and doors, exterior finish, plumbing, electrical, HVAC, fire sprinklers, solar, insulation, drywall, flooring, cabinets, countertops, tile, fixtures, paint, and the driveway and flatwork the site needs to pass final. Licensed plumbers, electricians, HVAC and solar contractors perform the licensed work, scheduled and supervised by us as your general contractor.

Soft costs are everything that must exist before and around the building:

• Architectural design and construction drawings
• Structural engineering, and civil engineering for grading and drainage
• Geotechnical (soils) report and, on hillside lots, an engineering geology report
• Title 24 energy compliance report
• Boundary and topographic surveys
• Planning clearances (hillside, historic, coastal and Specific Plan reviews where they apply)
• Plan check and building permit fees, plus the electrical, plumbing, mechanical and fire-sprinkler permits
• School impact fee, sewer facilities charge and utility service charges
• Temporary power, water, fencing and builder’s risk insurance during construction
• Your own carrying costs: the lot, financing and where you live meanwhile

Our LADBS permit costs guide explains each fee. The all-in range above includes design, engineering and permits for a straightforward lot, not the land, financing or temporary housing.

The lot decides the number before the finishes do

Two houses with the same plans and finishes can be far apart in price because of what sits under and around them. These are the site factors we price first.

Flat lot or hillside

A flat lot with a conventional continuous footing or a post-tension slab is the baseline. In the City of Los Angeles Hillside Area, which includes the hill neighborhoods of Encino, Sherman Oaks and Studio City, the Baseline Hillside Ordinance sizes the house by the slope of the lot and limits grading and export; a soils and geology report is required, the LADBS Grading Division approves it before foundation plan check proceeds, and large excavations need a haul route. The foundation becomes caissons and grade beams or stepped footings with retaining walls, and the site work can cost as much as the framing. Our foundation page covers hillside foundations and expansive soils.

Sewer, water and power

A lot with a sewer in the street pays the city’s Sewerage Facilities Charge for the new dwelling and a connection permit; a lot without one needs a private sewage system. In the City of Los Angeles the Department of Water and Power sets the electrical service and the water meter; outside it, Southern California Edison and the local water company do, and a new service can take months to schedule, so we file for it during plan check.

Soils

Expansive clay in Corona, Eastvale and parts of Santa Clarita, alluvial soils in Ontario and Rancho Cucamonga, and mapped liquefaction zones change the footing design: deeper footings, more steel, a thicker reinforced slab or a post-tension slab. The soils report tells the engineer which, and it is the first report we order on any lot.

Fire zone

A lot in a Very High Fire Hazard Severity Zone, which now covers much of the hillside Valley, the Santa Monica Mountains and the Orange County canyons, is built to the state Wildland-Urban Interface code in effect since January 1, 2026: a Class A roof assembly, ember-resistant vents, ignition-resistant siding and decking, tempered glazing and closed eaves.

Demolition

A teardown starts with a South Coast AQMD Rule 1403 asbestos survey by a certified consultant, required before any demolition regardless of the house’s age, and a notification filed at least ten working days before work begins; then a demolition permit and utility disconnects.

Codes that set the baseline for every new house

These are in every permit set, and a per-square-foot number from another state does not include them.

• Fire sprinklers. California has required an automatic residential fire sprinkler system in every new one- and two-family house since January 1, 2011.
• Solar. Since January 1, 2020, the state energy code has required a solar photovoltaic system on new single-family homes, sized to the house.
• The 2025 Energy Code. For permits filed on or after January 1, 2026, the code’s energy budgets favor heat pumps for space heating, cooling and water heating and tighten wall and window performance, so a new Los Angeles house is designed around a heat-pump system and a well-insulated envelope rather than a gas furnace and a tank water heater.
• Seismic. Every new house here is an engineered structure: continuous footings or a post-tension slab, shear walls, hold-downs, straps and blocking, each inspected before it is covered.
• School fees. Before LADBS will issue the permit, the school district collects a per-square-foot developer fee on new residential construction; the Los Angeles Unified rate is $5.17 per square foot as of June 2024, with the statutory maximum reset by the State Allocation Board every two years. It passes through at cost.

Teardown and rebuild, or whole-home renovation?

The question comes up on every 1940s to 1960s Valley house whose lot is worth more than the building. Our whole-home renovation cost guide puts a full gut to the studs at $250 to $400 per square foot and a gut with structural changes at $350 to $500 or more, against $300 to $600 all-in for building new. Per square foot, building new is the higher number; what separates them is what you get for the money.

	Whole-home renovation	Teardown and rebuild
Typical Los Angeles budgeting estimate	$250–$400 per sq ft (gut); $350–$500+ with structural changes	$300–$600 per sq ft all-in
Keeps	Footprint, foundation, some framing, and any non-conforming setbacks or floor area an older house enjoys	Nothing; the new house meets current zoning, setbacks and the 45 percent floor-area cap on most R1 lots
Best when	The structure is sound and the layout works, or the existing house exceeds what zoning would allow new	The foundation or framing is failing, the layout is wrong, or you want a larger or two-story house the lot allows

These are typical Los Angeles budgeting estimates, not a price list or a quote. Your project can come in lower or higher depending on the house, the scope and the finishes; the only real number is a written proposal after a site visit.

The trap is the middle. Once more than half the perimeter walls and more than half the roof come down, LADBS treats a remodel as new construction, with full as-built plans and current zoning, so the project pays the cost of a new house while inheriting an old foundation and an old plan; at that line rebuilding often buys a better house for similar money. The reverse trap is a house in a Historic Preservation Overlay Zone or one whose floor area exceeds what the Baseline Mansionization Ordinance would allow new; there, the old house is worth keeping. A third option on a large lot is an SB 9 second house: since 2022 state law has allowed a second primary home, or a lot split, on most single-family lots with ministerial approval and four-foot side and rear setbacks, subject to each city’s objective standards.

How long it takes to build a house in Los Angeles

A new house runs longer than any addition. Our second-story additions take nine to fourteen months from the first meeting to the final inspection, and a ground-up house runs longer than that, with most of the extra time in design, engineering and plan check rather than on site. The sequence is feasibility, design and engineering, Planning clearances, LADBS plan check (plans are assigned within a few days and returned within weeks depending on workload; an expedited review costs 50 percent more in plan-check fees), demolition and grading, foundation, framing and roof, rough trades, insulation and drywall, finishes, and final inspections leading to the certificate of occupancy.

What a fixed-price contract covers

A new-house proposal from us is a fixed price for a defined scope, and the definition is what protects you. It lists the drawings and engineering; the site work assumed and the soils report behind it; the foundation type; the structure; every trade; the fixtures, finishes and appliances by product or by a named dollar allowance; the permits and fees, with pass-through fees such as the school fee shown at cost; and the exclusions, usually the land, financing, furniture and landscaping beyond what construction disturbs. Anything outside the scope goes through a written change order before the work is done, and payments follow the milestones the inspector signs off, with a down payment of $1,000 or 10 percent, whichever is less, as California law requires. Hold 15 to 20 percent of the accepted bid as a contingency on any teardown.

What a lot hides: a real example

We have not yet published a ground-up house story, but our ADU cost guide describes the kind of discovery a new foundation makes. On a roughly 600 square foot detached unit the owner expected to cost about $180,000, digging the footings exposed the main house’s original clay sewer line, cracked and full of roots; rerouting it cost about $14,000. The 100-amp panel was full, and a 200-amp upgrade ran about $6,000 to $8,000 with about three weeks of utility delay. Selections made during framing added about $30,000, and the unit finished at about $265,000. On a teardown the equivalents are an abandoned septic tank, an unmapped sewer lateral and uncompacted fill under the old slab, which is why the soils report comes before the first drawing.

Where we build new homes

We build from our Van Nuys office across the San Fernando Valley and the rest of Los Angeles County, where flat 1950s tract lots are the most common teardown sites and the hillside neighborhoods bring the Baseline Hillside Ordinance and fire-zone construction into play. Orange County adds HOA architectural review on master-planned lots and city building divisions with their own fee schedules. Ventura County mixes hillside and fire-zone lots in Thousand Oaks and Simi Valley with older flat lots in Ventura and Oxnard. Western Riverside County and western San Bernardino County bring expansive and alluvial soils in Corona, Eastvale, Ontario and Rancho Cucamonga. See every area we serve.

Cost to build a house FAQs

How much does it cost to build a house in Los Angeles per square foot?

Building a house in Los Angeles typically costs $300 to $600 per square foot all-in, with hillside sites and custom finishes above that. The figure includes design, engineering, permits and construction with standard finishes and excludes the land. These are typical budgeting estimates, not a price list; a real project can come in lower or higher.

How much does it cost to build a 2,000 square foot house in Los Angeles?

A 2,000 square foot house in Los Angeles is $600,000 to $1,200,000 at $300 to $600 per square foot, before the lot. A flat lot with standard finishes sits in the lower half of that; a hillside lot or custom finishes push it toward the top and beyond.

Is it cheaper to tear down and rebuild or to remodel in Los Angeles?

A full gut renovation in Los Angeles runs $250 to $400 per square foot and a gut with structural changes $350 to $500 or more, while building new is $300 to $600 all-in. Per square foot, rebuilding is the more expensive of the two. Rebuilding wins when the foundation or layout is failing or you want a bigger house the lot allows; remodeling wins when the structure is sound or the existing house exceeds what current zoning would permit new.

What are the soft costs of building a house?

Soft costs on a Los Angeles house are the design and construction drawings, structural and civil engineering, the soils report, the Title 24 energy report, surveys, Planning clearances, plan check and permit fees, school and sewer fees, utility service charges, insurance during construction, and your own carrying costs for the lot, financing and temporary housing. They arrive before a shovel goes in.

Does a new house in California have to have solar panels and fire sprinklers?

Yes. California has required an automatic fire sprinkler system in every new one- and two-family house since January 1, 2011, and a solar photovoltaic system on new single-family homes since January 1, 2020. For permits filed on or after January 1, 2026, the 2025 Energy Code also favors heat pumps for heating, cooling and hot water and tightens wall and window performance, and a house in a Very High Fire Hazard Severity Zone is built to the state Wildland-Urban Interface code.

How long does it take to build a house in Los Angeles?

Building a house in Los Angeles takes longer than any addition: our second-story additions run nine to fourteen months from the first meeting to final inspection, and a ground-up house runs longer, with most of the extra time in design, engineering and plan check rather than on site. LADBS assigns plans within a few days and returns them within weeks, and an expedited review costs 50 percent more in plan-check fees.

Start with the lot, not the floor plan

Send us the address and what you want to build. We will check the zoning, overlays, sewer and soils, walk the site, and give you a written, itemized proposal that lists site work, structure, trades, finishes, permits and pass-through fees line by line. The feasibility check, the site visit and the estimate are free.

A Los Angeles building permit does not have a flat price. The Los Angeles Department of Building and Safety (LADBS) calculates the building permit fee from the valuation of the work using the fee table in the Municipal Code, adds a plan check fee equal to 90 percent of the permit fee whenever plans are reviewed, then adds separate electrical, plumbing and mechanical permits, city and state surcharges and, for new square footage, the school district’s developer fee and the city’s sewer charge. Green Design and Build is a licensed, bonded and insured general contractor (CSLB #1110975) based in Van Nuys, serving homeowners across Los Angeles County, Orange County, Ventura County, western Riverside County and western San Bernardino County (Ontario, Rancho Cucamonga and neighbouring cities), and we pull these permits every week. This guide explains what each line is, who charges it, when it is paid and how it is calculated, citing the official schedules; the only figures that are not official are the budgeting ranges by project type, which are typical Los Angeles estimates, not a price list or a quote.

Who we are

Green Design and Build is led by Dekel Sofer. We hold a 4.7-star rating across 146 Yelp reviews and have completed hundreds of projects, most of them permitted through LADBS at the Van Nuys and Metro Development Services Centers or through the city building divisions across our five counties. Permits and fees appear as their own lines on every proposal we write, passed through at cost.

The fees, one by one

Fee	Who charges it	How it is calculated	Official basis
Building permit fee	LADBS	From the valuation of the work using Table 1-A of the Building Code; the base table runs from $65 for work up to $2,000 to “$395 plus $3.50 per $1,000” between $100,000 and $500,000 and “$520 plus $3.25 per $1,000” up to $1,000,000, indexed to the Los Angeles consumer price index each July 1	LAMC 91.107.2 and Table 1-A; 91.107.1.1
Plan check fee	LADBS	90 percent of the building permit fee, charged whenever plans must be reviewed; an expedited review costs 50 percent more	LAMC 91.107.3.1.1; LADBS Regular Plan Check page
Plan maintenance fee	LADBS	2 percent of the building permit fee, minimum $10, maximum $300	LAMC 91.107.4.3
Fire hydrant fee	LADBS for the Fire Department	0.22 percent of the total valuation on projects of $50,000 or more	LAMC 91.107.4.4
Strong Motion Instrumentation fee	State of California, collected by LADBS	$13 per $100,000 of valuation for houses of one to three stories, minimum 50 cents	Public Resources Code 2705
Electrical permit	LADBS	Per item: branch circuits from $17, outlet and light groups from $18, panels from $16; $55 or $90 minimum; $23 issuance fee; plus a 3 percent Development Services surcharge and a 6 percent Systems surcharge	LADBS electrical fee schedule (rev. 12/2016)
Plumbing permit	LADBS	Per item: $23 per new fixture, $10 to replace one, $28 per water heater, $40 for a sewer connection, $10 per gas outlet; $23 issuance fee; same surcharges	LADBS plumbing fee schedule (rev. 7/2017)
Mechanical (HVAC) permit	LADBS	Per item: $19 per gas furnace, $24 per air handler; $24 issuance fee; same surcharges	LADBS mechanical fee schedule (rev. 7/2017)
Certificate of Occupancy	LADBS	$150 per unit on new dwellings and ADUs	City of Los Angeles Housing Element fee summary
School developer fee	Los Angeles Unified School District	$5.17 per square foot of new residential space (rate effective June 8, 2024), on new houses and on additions of 500 square feet or more; paid to LAUSD for a certificate LADBS requires before issuing the permit	LAUSD Developer Fee program; Education Code 17620
Sewerage Facilities Charge	LA Sanitation, before the sewer connection permit	Charged for a new connection and for each additional dwelling unit or bedroom	LAMC 64.16.1
Planning clearances and cases	LA City Planning	Building permit clearance (minor) $324; HPOZ Certificate of Appropriateness for an addition $1,920; Zoning Administrator adjustment, single-family $9,966; Coastal Development Permit, single-family $13,046; plus a 3 percent surcharge (July 1, 2024 schedule, indexed each July)	City Planning CPI-adjusted fee schedule; LAMC 19.01–19.08

Three cautions. The building-code amounts are the base figures in the Municipal Code, and the trade schedules LADBS posts were last revised in 2016 and 2017; because the code indexes fees to inflation every July 1, the amount on your permit will be higher than the printed base, and the LADBS Permit Fee Calculator is the only place to get the current number. The Planning figures are from the schedule effective July 1, 2024 and are adjusted each July as well. And the school fee is the district’s posted rate; the State Allocation Board raised the statutory maximum to $5.38 per square foot in January 2026, which LAUSD may adopt on its own schedule. These official rates are what the city and the district charge; they are not a price list for a project, and the only real permit number is the one on a written proposal after a site visit.

What “valuation” means, and why it drives everything

Valuation is LADBS’s estimate of the cost of the work, and the building permit fee, the plan check fee, the plan maintenance fee, the hydrant fee and the state seismic fee all key off it. For new buildings and additions LADBS uses its Building Permit Valuation Table, a per-square-foot schedule by building type (an average-quality wood-frame dwelling is listed at $101 per square foot and a good-quality one at $137 on the table effective August 17, 2015, with patio covers at $16); for remodels the valuation follows the contract price. So a permit for a $150,000 kitchen costs more than one for a $60,000 kitchen with identical paperwork, and understating the valuation to shrink the fee is fraud against the city and a problem at sale, so we do not do it.

Who pays, and when

The contractor who pulls the permit is the applicant, and in our proposals the permit and plan check fees are their own line, paid by you at cost as they come due. The plan check fee is paid when the plans are submitted; after review and corrections, LADBS emails a fee statement, and the building permit fee, trade permits and surcharges are paid at issuance. The school certificate and the sewer charge are collected before issuance where they apply, and Planning fees are paid when the clearance or case is filed, before plan check.

Express permit, counter plan check or regular plan check

The path changes the fee as much as the valuation does, because the 90 percent plan check fee applies only when plans are reviewed.

• Express permit (no plan check). LADBS issues express permits, online as e-permits, for simple work: re-roofs, non-structural kitchen and bathroom remodels, same-size window and door replacement, water heaters, re-stucco and similar items on its express permit list. You pay the permit fee, trade permits and surcharges, and no plan check fee. Our posts on whether you need a permit to replace your roof, kitchen remodel permits and bathroom remodel permits cover which remodels stay on the express list.
• Counter plan check. Small plan sets, such as a non-bearing wall removal with an engineered beam, can be reviewed over the counter at a Development Services Center.
• Regular plan check. Additions, new buildings, ADUs and structural alterations must be filed through Building Plan Check before a permit is issued. Plans are assigned within a few days of submittal and returned within weeks depending on workload, with corrections in cycles. Paying 50 percent more of the plan check fee expedites the review.

What the permits look like by project

Project	Path at LADBS	Fees that apply
Re-roof, like-for-like	Express permit	Building permit fee on the roofing valuation, surcharges, Certificate of Compliance at final
Kitchen or bathroom remodel, no structural change	Express permit	Building permit fee, electrical, plumbing and mechanical permits, surcharges
Kitchen or bathroom remodel with a wall removed or window enlarged	Counter or regular plan check	The above plus the plan check fee
Room addition	Regular plan check	Building permit and plan check fees, trade permits, surcharges, hydrant fee, seismic fee; LAUSD fee if 500 square feet or more; sewer charge for an added bedroom; Planning clearance in overlay zones
ADU	Regular plan check or City standard plan	The addition fees plus a Certificate of Occupancy; no impact fees under 750 square feet; no school fee under 500 square feet; no separate utility connection fee for an ADU inside the existing house
New single-family house	Regular plan check with Planning, Fire, Sanitation and DWP clearances	Every fee in the table, plus demolition, grading and fire sprinkler permits and utility charges

These are typical Los Angeles budgeting estimates, not a price list or a quote. Your project can come in lower or higher depending on the house, the scope and the finishes; the only real number is a written proposal after a site visit.

For scale, our room addition cost guide treats plan check, permit and city fees as one of four soft-cost lines beside drawings and engineering, the soils report and the Title 24 report, and our new home construction page lists the school fee and sewer charge as separate pass-through lines. On a remodel the permit is a small fraction of the project; on an addition or a house it is a real line, mostly because of the school fee and the plan check.

ADU fee rules that lower the bill

State law removes several fees for ADUs, and they should be missing from any ADU estimate you compare. Under Government Code section 66324, no local agency, special district or water company may impose an impact fee on an ADU of less than 750 square feet, and impact fees on larger ADUs must be charged in proportion to the primary house. Since January 1, 2026, an ADU or junior ADU under 500 square feet is also treated as construction that does not trigger the school developer fee. An ADU created inside the existing house or an existing accessory structure, such as a garage conversion, cannot be required to have a new utility connection or pay a connection fee or capacity charge, unless it is built with a new house or sold separately. The LADBS permit and plan check fees still apply, and a detached ADU built from one of the City’s pre-approved standard plans moves through plan check faster than a custom set. Our ADU and ADU rules pages cover the zoning side.

Inspections and what they cost

The permit fee covers the inspections listed on the permit: foundation, framing, rough electrical, plumbing and mechanical, insulation, drywall and final for an addition; rough and final for most remodels; a sheathing inspection and the Certificate of Compliance for a re-roof. Each one is recorded on the Building Card, and a phase cannot be covered until its inspection has passed. What is not in the fee is a failed inspection that has to be repeated, which LADBS bills as a re-inspection, or work opened up because it was covered early; both are avoidable with scheduling.

What an unpermitted job costs instead

Our post on how to hire a general contractor without getting scammed tells the story of a $28,000 kitchen where the contractor pulled no electrical permit before disappearing at about 60 percent complete. The homeowner paid a second contractor to finish, then paid for permit corrections and code-compliance work on the electrical, which meant opening finished walls so an inspector could see what had been done. A permit’s fee is a small share of a project; retrofitting one is not, and an unpermitted addition is excluded from appraised square footage and surfaces at sale. Our guide to what a Los Angeles general contractor costs shows where permit fees sit in a full budget.

Where we do this work

The fee structure in this guide is the City of Los Angeles’s, which covers Van Nuys, Sherman Oaks, Encino, Studio City, Woodland Hills and the rest of the San Fernando Valley as well as the basin, the Westside and the harbor in Los Angeles County. Burbank, Glendale, Pasadena, Santa Clarita, Long Beach and Torrance run their own building divisions with their own fee schedules, and unincorporated areas use LA County Building and Safety. Every city in Orange County and Ventura County, Corona, Riverside, Murrieta and Eastvale in western Riverside County, and Ontario, Rancho Cucamonga and Chino in western San Bernardino County do the same under the same state codes; the school fee and the state seismic fee apply everywhere. Every city and county we serve is on our service areas page.

LADBS permit cost FAQs

How much does a building permit cost in Los Angeles?

An LADBS building permit is priced from the valuation of the work using the fee table in Municipal Code section 91.107, with a plan check fee of 90 percent of the permit fee when plans are reviewed, plus trade permits, a plan maintenance fee, a fire hydrant fee on projects of $50,000 or more, the state seismic fee and city surcharges. The code indexes the base table to inflation each July 1, so the LADBS Permit Fee Calculator gives the current number. Any total you see quoted elsewhere is a typical estimate, not a price list.

What is the LADBS plan check fee?

The LADBS plan check fee is 90 percent of the building permit fee for a building or structure under Municipal Code section 91.107.3.1.1, paid when the plans are submitted. It applies to any project that needs plans reviewed, such as an addition, an ADU, a new house or a remodel with structural changes, and not to express permits. An expedited review costs 50 percent more of the plan check fee.

Do I have to pay school fees for a room addition in Los Angeles?

Yes if the addition adds 500 square feet or more of residential space; the Los Angeles Unified School District’s developer fee, $5.17 per square foot at the rate effective June 8, 2024, is paid to the district for a certificate LADBS requires before issuing the permit. Residential additions under 500 square feet are exempt, and since January 1, 2026 an ADU under 500 square feet is treated the same way.

Are ADUs exempt from permit fees in Los Angeles?

ADUs still pay LADBS building permit, plan check and trade permit fees, but state law removes other charges: no impact fees on an ADU under 750 square feet (Government Code section 66324), proportionate impact fees above that, no school developer fee on an ADU under 500 square feet, and no new utility connection or connection fee for an ADU created inside the existing house or garage. Those items should be absent from any ADU estimate you compare.

What is an LADBS express permit?

An LADBS express permit is a permit for simple work that needs no plan check, issued online as an e-permit or at a Development Services Center. Re-roofs, non-structural kitchen and bathroom remodels, same-size window and door replacements, water heaters and re-stucco are on the express list. You pay the permit fee, trade permits and surcharges but no plan check fee, and the permit is usually issued in days.

Who pays the permit fees, the homeowner or the contractor?

The licensed contractor applies for the permit and is responsible for the work under it, and the fees are passed through to the homeowner at cost, inside the contract price or as a separate line. Green Design and Build lists permit, plan check, school and sewer fees on every proposal so you can see what the city charged. Be wary of a bid that leaves permits out or offers to skip them.

See the permit line before you see the price

Tell us what you want to build and where. On a free site visit we identify which permit path your project takes, which Planning clearances and school or sewer fees apply, and we itemize every one of them on the written proposal so the city's charges are visible, not buried.

A second-story addition in Los Angeles typically costs $400 to $650 per square foot all-in: $200,000 to $350,000 for a partial second story of 400 to 600 square feet, and $350,000 to $650,000 or more for a full second story of 800 to 1,200 square feet, including design, engineering, permits, construction and standard finishes. Green Design and Build is a licensed, bonded and insured general contractor (CSLB #1110975) based in Van Nuys, serving homeowners across Los Angeles County, Orange County, Ventura County, western Riverside County and western San Bernardino County (Ontario, Rancho Cucamonga and neighbouring cities). These are typical Los Angeles budgeting estimates, not a price list or a quote; your project can come in lower or higher depending on the house, the scope and the finishes, and the only real number is a written proposal after a site visit.

Who we are

Green Design and Build is led by Dekel Sofer. We hold a 4.7-star rating across 146 Yelp reviews and have completed hundreds of projects across the five counties above. Our room additions page covers how we build additions; this guide is about what a second story costs, why, and when it is the wrong answer.

Second-story addition cost by size

Every range below assumes a wood-frame single-story house on a flat lot and includes drawings, engineering, the Title 24 report, plan check and permit fees, the structural work through the first floor, the new roof, systems and standard finishes.

Addition	Typical size	Typical Los Angeles budgeting estimate
Partial second story (one or two rooms over part of the house)	400–600 sq ft	$200,000–$350,000
Full second story	800–1,200 sq ft	$350,000–$650,000+

These are typical Los Angeles budgeting estimates, not a price list or a quote. Your project can come in lower or higher depending on the house, the scope and the finishes; the only real number is a written proposal after a site visit.

The arithmetic: a 500 square foot partial second story at $400 to $650 per square foot is $200,000 to $325,000; a 1,000 square foot full second story is $400,000 to $650,000. Two bathrooms and a laundry upstairs put a project high in its range; two dry bedrooms over the garage wing put it low. Our room addition cost guide has the full addition table, and our guide to what a Los Angeles general contractor costs shows where additions sit against other projects.

Why a second story costs $400 to $650 per square foot

A ground-floor addition in Los Angeles runs $300 to $500 per square foot. The second-story premium, roughly $100 to $150 more per square foot, pays for what has to happen to the house underneath the new rooms.

The foundation has to be verified, and often improved

The existing footings were sized for one floor. Before the engineer can draw the second story, we expose sections of the foundation, measure the footing width and depth, and check the concrete and the anchor bolts. On a 1950s to 1970s Valley ranch house the footing is often narrower than two stories need, and the fix ranges from new footings under the new bearing points to underpinning the existing stem wall. As typical Los Angeles budgeting estimates, foundation underpinning runs $10,000 to $40,000, and a bolt-and-brace retrofit, which the engineer usually folds into the design on a pre-1980 raised-foundation house, runs $4,000 to $12,000.

New shear walls, posts and beams through the first floor

A second story changes the load path of the whole house. The engineer adds plywood shear walls with hold-downs at the first floor to resist the earthquake and wind loads of the taller building, and new posts and beams to carry the second-floor joists down to the footings. That work runs through finished rooms: drywall comes off, kitchen cabinets sometimes come out, and closets get thicker. The stair takes floor area from the first floor, usually a bedroom or a corner of the living room, and that lost room is decided before any drawing is made.

The roof comes off and a temporary roof goes on

The existing roof and ceiling framing are removed, the new floor is framed over the first-floor walls, and the house is open to the sky until the second-floor walls and new roof are up. We schedule this phase for the dry months where we can and cover the house with a temporary membrane; it is the most expensive stretch of the project.

Systems that were sized for one floor

A second story almost always needs its own HVAC zone, because the existing furnace and ducts cannot reach it, and new bathrooms need drains routed down through the first floor. Many Valley houses still run on a 100-amp panel, and a new floor with a heat pump, bathrooms and bedrooms usually pushes it to a 200-amp upgrade, which our electrical page puts at $4,000 to $8,000 for an overhead service, or $8,000 to $15,000 or more if the utility has to change the service. Where demolition exposes original cloth-wrapped or aluminum wiring, a whole-house rewire at $15,000 to $35,000 often makes sense while the walls are open. Electrical, plumbing and HVAC work is performed by licensed electricians, plumbers and HVAC contractors and scheduled and supervised by us as your general contractor.

Living somewhere else

Temporary housing is not in the construction estimate, but it is in the budget. Most families move out for the five to seven months of construction, because there is no ceiling, and at times no water or power, for weeks at a time. Put a number on the rent before you compare options.

Build up or build out?

The choice usually decides itself once you look at the lot.

	Build out (ground-floor addition)	Build up (second story)
Typical Los Angeles budgeting estimate	$300–$500 per sq ft	$400–$650 per sq ft
Best when	The lot has room within setbacks and floor-area limits	The lot is small or already built out; you want to keep the yard, pool or a future ADU site
Structure	New footings and slab or raised floor; tie-in beam at the existing wall	Foundation verification, new footings, shear walls, posts and beams through the first floor
Living at home during construction	Usually yes	Usually not
Construction time	4–7 months	5–7 months
Total, first meeting to final inspection	9–14 months	9–14 months

These are typical Los Angeles budgeting estimates, not a price list or a quote. Your project can come in lower or higher depending on the house, the scope and the finishes; the only real number is a written proposal after a site visit.

Build out when the lot allows it and the space you want (a primary suite, a bigger kitchen, a family room) belongs on the main floor. Build up when a ground-floor addition would consume the backyard on a 5,000 to 6,000 square foot lot, or when you want the bedrooms upstairs and one open living floor below.

What the City of Los Angeles lets you build

Zoning decides whether the second story you want can exist, so we check four things before design starts.

Floor area. Under the Baseline Mansionization Ordinance, the residential floor area of a house on most R1 lots is capped at 45 percent of the lot area, existing square footage included. A 6,000 square foot R1 lot allows about 2,700 square feet of house; if the existing house is 1,500 square feet, roughly 1,200 square feet is available for a second story before exemptions and overlays. RS, RE, RA and the R1 variation zones use different ratios.

Height and the encroachment plane. On an R1 lot outside the hillside and coastal areas, the Municipal Code limits the house to 33 feet where the roof of the top floor slopes 25 percent or more, and 28 feet where it is flatter. Second-story walls must also stay inside an encroachment plane that starts 20 feet above grade at the side setbacks, which is what produces the stepped-back second stories you see on 50-foot Valley lots.

Setbacks. The new floor sits inside the same envelope as the first: a front yard of 20 feet or the prevailing setback, 5-foot side yards and a 15-foot rear yard on a standard R1 lot. A second story over a garage built to the property line under an older permit usually is not possible.

Overlays. In a Historic Preservation Overlay Zone, every exterior addition is reviewed under the HPOZ preservation plan before Building and Safety will take the plans, and a second story on a contributing single-story bungalow is often the one addition the board will not approve because it changes the streetscape. Hillside lots add the Baseline Hillside Ordinance’s slope-based floor area and grading limits and a geotechnical report; coastal lots add a Coastal Development Permit. Outside the City of Los Angeles, every city applies its own floor-area, height and setback rules, and master-planned communities add HOA architectural review before the city will issue anything.

When a detached ADU is the better answer

Sometimes the honest recommendation is not to add a second story at all. State law requires cities to approve a detached ADU of up to 800 square feet with 4-foot side and rear setbacks even where the lot’s floor-area cap or lot coverage would block an addition of the same size. An ADU is approved ministerially, you stay home during construction, its foundation and roof are new rather than retrofitted, and it can be rented or house a parent, which an addition cannot legally do. Our published ADU figures put a detached 500 square foot unit at $180,000 to $260,000, against $200,000 to $350,000 for a partial second story of similar size. Choose the second story when the space has to connect to the existing rooms or you want bedrooms over the living floor. Our guide to ADU vs room addition and our ADU page walk through the decision; if the house is a teardown candidate, see new home construction.

How long a second-story addition takes

Phase	Typical time
Design, structural engineering and Title 24	8–12 weeks
Plan check and permits (LADBS or the city)	2–4 months
Construction	5–7 months
Total, first design meeting to final inspection	9–14 months

A second story cannot use an LADBS Express Permit; it goes through full Building Plan Check with structural calculations, then staged inspections from the exposed footings through framing, shear nailing, rough trades and final. HPOZ, hillside and HOA reviews sit in front of plan check, and each correction cycle adds weeks. Demolition does not start until the permit is in hand.

What opening up a 1950s house finds

We have not yet published a second-story project story, but the discoveries are the ones we describe in our ADU cost guide, because the same kind of house is being opened up. On that project, a roughly 600 square foot detached unit the owner expected to cost about $180,000, digging the foundation exposed the main house’s original clay sewer line, cracked and full of roots; rerouting it cost about $14,000. The 100-amp panel was full, and an electric range and heat pump forced a 200-amp upgrade at about $6,000 to $8,000 with about three weeks of utility delay. Selections made during framing added about $30,000, and the unit finished at about $265,000. On a second story the equivalent surprises are an undersized footing, an unbolted sill, a rotted top plate and a full panel, which is why we hold 15 to 20 percent of the accepted bid as a contingency on any pre-1980 house.

When you compare quotes, ask each bidder to put the foundation assumptions, the structural scope, the HVAC zone and panel, the roof and stucco scope and the finish allowances in writing. A bid without the foundation and structural scope written down is not the low bid; it is the one that has not been priced yet.

Where we do this work

Most of our second-story additions are in the San Fernando Valley and the rest of Los Angeles County, where single-story ranch houses on small lots, LADBS plan check and the 45 percent floor-area cap shape the project. In Orange County city building divisions and HOA review run side by side. Ventura County adds fire-zone construction on hillside lots in Thousand Oaks and Simi Valley. Western Riverside County and western San Bernardino County bring newer slab houses on expansive soils in Corona, Eastvale, Ontario and Rancho Cucamonga. Every city and county we serve is on our service areas page.

Second-story addition cost FAQs

How much does a second-story addition cost in Los Angeles?

A second-story addition in Los Angeles typically costs $400 to $650 per square foot all-in, or $200,000 to $350,000 for a 400 to 600 square foot partial second story and $350,000 to $650,000 or more for a full 800 to 1,200 square foot second floor, including design, engineering, permits, construction and standard finishes. These are typical budgeting estimates, not a price list; a real project can come in lower or higher.

Why does a second story cost more than a ground-floor addition?

A second story costs roughly $100 to $150 more per square foot than a ground-floor addition in Los Angeles because the existing foundation must be verified and often underpinned, new shear walls, posts and beams run through the first floor, the roof comes off and is rebuilt, the new floor needs its own HVAC zone and often a 200-amp panel, and most families pay rent elsewhere for the roof-off phase. The rooms upstairs are the cheap part.

Is it cheaper to build up or build out?

Building out is cheaper per square foot in Los Angeles, at $300 to $500 against $400 to $650 for building up, and it usually lets you stay in the house. Building up is the better choice on a small lot where a ground-floor addition would take the yard, when the house is near its 45 percent floor-area cap and the yard is worth keeping, or when you want the bedrooms upstairs.

Can my foundation support a second story?

Most single-story Los Angeles houses can carry a second story, but a structural engineer has to verify the existing footings first, and on 1950s to 1970s houses the footing is often narrower than two stories require. The usual fixes are new footings under the new bearing points or underpinning, which runs $10,000 to $40,000 as a typical Los Angeles budgeting estimate, plus anchor bolts and cripple-wall bracing on a pre-1980 raised foundation.

How tall can a second story be in Los Angeles?

On a standard R1 lot in the City of Los Angeles outside the hillside and coastal areas, the house may be 33 feet tall where the roof of the top floor slopes 25 percent or more and 28 feet where it is flatter, and second-story walls must stay inside an encroachment plane that begins 20 feet above grade at the side setbacks. Hillside lots use the Baseline Hillside Ordinance, and other cities set their own limits.

Do I have to move out during a second-story addition?

Yes for most of the project. The roof comes off, the first floor is opened for shear walls, posts and beams, and the house has no ceiling, and at times no water or power, for weeks, so most families move out for the five to seven months of construction. Temporary housing is not in the construction estimate; budget for it before comparing a second story with a ground-floor addition or an ADU.

Find out whether your house can take a second story before you budget for one

Send us the address and what you need the space for. On a free site visit we check the floor-area allowance, the height limit and overlays for your lot, look at the foundation and the panel, and tell you whether to build up, build out or build an ADU, then give you a written, itemized estimate for the option that makes sense.

A room addition in Los Angeles typically costs $300 to $500 per square foot all-in for a ground-floor addition and $400 to $650 per square foot for a second story, which puts a 250 square foot bedroom at roughly $75,000 to $125,000 and a full second story at $350,000 to $650,000 or more. Green Design and Build is a licensed, bonded and insured general contractor (CSLB #1110975) based in Van Nuys, led by Dekel Sofer; we design, engineer, permit and build additions for homeowners across Los Angeles County, Orange County, Ventura County, western Riverside County and western San Bernardino County. The figures on this page are typical Los Angeles budgeting ranges, not a quote, and “all-in” means design, structural engineering, permits, construction and standard finishes.

Our room additions service page covers zoning and how we build. This guide is about the money: what the number includes, what pushes it up, what the permit set costs, and how to read two quotes that are $80,000 apart.

Room addition cost by type

Every range below includes design, engineering, permits, construction and standard finishes for a home on a flat lot with a conventional foundation.

Addition type	Typical size	Typical Los Angeles range
Bedroom or home office, ground floor	200–350 sq ft	$75,000–$150,000
Primary suite with bathroom, ground floor	350–500 sq ft	$130,000–$250,000
Family room or kitchen expansion, ground floor	300–500 sq ft	$110,000–$230,000
Partial second story (one or two rooms over part of the house)	400–600 sq ft	$200,000–$350,000
Full second story	800–1,200 sq ft	$350,000–$650,000+

The arithmetic is simple: a 400 square foot ground-floor addition at $300 to $500 per square foot is $120,000 to $200,000; a 500 square foot partial second story at $400 to $650 is $200,000 to $325,000; a 1,000 square foot full second story is $400,000 to $650,000. Where a project sits inside its range depends on whether it contains a bathroom or kitchen, what the existing structure and soil require, and the finish level. Our guide to what a Los Angeles general contractor costs puts general contractor pricing at $150 to $450 per square foot by project type; additions sit at the top of that range because every square foot involves foundation, framing, roof and exterior, where a remodel reuses the shell.

Why a second story costs $400 to $650 per square foot

The premium over a ground-floor addition, roughly $100 to $150 more per square foot, is not the upstairs rooms; it is what has to happen to the first floor and the roof to make them possible. The existing foundation and first-floor walls were sized for one story, so on most pre-1980 homes the engineer calls for new footings, posts, beams and shear walls threaded through finished rooms. The roof comes off and a new one goes on over the new floor. A stair takes floor space downstairs. A second story almost always needs its own HVAC zone and often a panel upgrade. And most families move out for the roof-off phase; that rent is not in the construction number, but it belongs in the budget. On a small Valley lot where a ground-floor addition would consume the backyard, the second story is still often the right answer, budgeted as a structural project first and a set of rooms second.

What the all-in number includes, and what it does not

The all-in ranges include drawings, engineering, the Title 24 report, plan check and permit fees, and every trade from foundation through paint, with electrical, plumbing and HVAC performed by licensed electricians, plumbers and HVAC contractors and scheduled and supervised by us as your general contractor. They do not include furniture, landscaping beyond what construction disturbed, work in rooms outside the addition, temporary housing, HOA fees, or the contingency. Our ADU cost guide recommends holding 15 to 20 percent of the accepted bid as a true contingency, and additions on pre-1980 homes deserve the same rule, because the tie-in opens walls, roofs and foundations nobody has seen in decades.

Soft costs on a Los Angeles addition

These third-party costs are inside the all-in ranges above, but they arrive before a shovel goes in and they surprise homeowners. We itemize each of them in the written estimate.

Item	When it applies
Architectural drawings and structural engineering	Every addition; second stories and hillside lots at the top
Plan check, building permit and related city fees	Every addition; fees scale with the permit valuation
Geotechnical (soils) report	Hillside lots, mapped hazard zones, and wherever the plan checker asks for one
Title 24 energy compliance report	Every addition

What changes the price of a room addition

When two bids for the same addition are far apart, one of them usually priced a different set of these.

Bathrooms and kitchens inside the addition

A wet room carries the cost of a bathroom remodel on top of the shell: drain and supply lines, a roof vent, waterproofing, tile and fixtures. A kitchen expansion with a relocated sink and new circuits costs more still.

Foundation, soil and the structural tie-in

A conventional footing on a flat lot is the baseline. Hillside lots in the Santa Monica Mountains, the Hollywood Hills and the Valley foothills usually need a geotechnical report and deeper footings, grade beams or caissons. LADBS requires geologic or soils reports under Los Angeles Building Code Sections 7006.2 and 1803 on sites in state-mapped liquefaction and landslide zones, Alquist-Priolo Earthquake Fault Zones and the city’s Preliminary Fault Rupture Study Areas, prepared by a state-licensed engineer or geologist and approved by the LADBS Grading Division. Expansive clay soils in parts of Santa Clarita and western Riverside County change footing design too. At the tie-in, opening the existing wall means a beam, posts and new footings, and on a pre-1980 house the engineer will often add shear panels, hold-downs and anchor bolts where the walls connect. Where the existing foundation has settled or cracked, the repair is part of the project.

Roof, exterior and the cost of matching

A new roof tied into a low-slope 1960s roofline, matching eave detail, and new stucco blended into old are what make an addition invisible from the street; we re-stucco the whole affected elevation rather than patching, because a patch line never disappears. If the existing roof is near the end of its life, re-roofing the whole house at the same time is often cheaper than tying new into old and returning in five years.

Electrical panel and HVAC

Many Valley ranch houses still run on a 100-amp panel, and a suite with a heat pump and new circuits is often what pushes it to a 200-amp upgrade, which our ADU guide puts at about $6,000 to $8,000 plus utility coordination time. A ground-floor addition can sometimes extend the existing HVAC system; a second story usually cannot.

Fire zones, historic zones, HOA review and finish level

In a Very High Fire Hazard Severity Zone (the hills above the Valley, Malibu, much of Santa Clarita and Ventura County), new work must meet Chapter 7A ignition-resistant requirements for siding, vents, eaves and glazing. In an HPOZ historic zone the addition goes through the Office of Historic Resources before LADBS, and in master-planned Orange County communities HOA review runs alongside the city permit. Standard finishes are in the ranges; wide-plank hardwood, slab countertops and a steam shower are not, and they are the most common reason a final number lands above the estimate.

Permits and plan check for a room addition in Los Angeles

Every room addition in Los Angeles needs a building permit, and unlike a re-roof or a same-size window replacement, an addition cannot use an LADBS Express Permit. LADBS states that building plans must be filed and approved through Building Plan Check before a permit is issued for any “addition to building,” and its Express Permit bulletin (the no-plan-check list) has no category for additions or new floor area. In practice that means a full drawing set with structural calculations and a Title 24 report, submission through ePlanLA or over the counter, one or more rounds of corrections, then plumbing, electrical and mechanical permits, staged inspections from foundation through final, and a Certificate of Occupancy. LADBS covers the City of Los Angeles, including Van Nuys, Sherman Oaks, Encino, Studio City, Woodland Hills, Northridge and North Hollywood; Burbank, Glendale, Pasadena, Santa Clarita, Long Beach, Torrance and every Orange County city run their own building divisions. The code baseline is the same everywhere; the fees, the queue and the correction culture are not.

What your lot allows: setbacks and the 45 percent floor-area cap

Zoning is a cost question because it decides whether the addition you want can exist. On a standard R1 lot in the City of Los Angeles, the Municipal Code requires a front yard of 20 percent of lot depth up to 20 feet (or the prevailing setback on the block), side yards of at least 5 feet for a house of up to two stories, and a rear yard of at least 15 feet. Under the Baseline Mansionization Ordinance, the residential floor area of all buildings on most R1 lots is capped at 45 percent of the lot area, and second-story walls must stay inside an encroachment plane that starts 20 feet above grade at the side setbacks, which pushes upper floors inward on narrow lots. A 7,500 square foot R1 lot therefore allows about 3,375 square feet: with a 1,900 square foot house, roughly 1,475 square feet is available before overlays; with a 3,000 square foot house, a 375 square foot bedroom is the ceiling. RS, RE, RA and hillside lots use different ratios. We run these numbers on the first site visit; our ADU rules calculator is a quick first check.

How long does a room addition take?

All addition projects run 9 to 14 months from the first design meeting to final inspection; on a second story, plan-check months are also months of rent.

Phase (second-story addition)	Typical time
Design, structural engineering and Title 24	8–12 weeks
Plan check and permits (LADBS or city)	2–4 months
Construction	5–7 months
Total, ground floor or second story	9–14 months

These are typical Los Angeles budgeting estimates, not a price list or a quote. Your project can come in lower or higher depending on the house, the scope and the finishes; the only real number is a written proposal after a site visit.

A ground-floor addition follows the same phases with shorter design and construction stretches. Plan check is the phase homeowners underestimate: HPOZ, hillside, coastal and HOA reviews sit in front of the building department, and each correction cycle adds weeks.

A real example of what “hidden” costs look like

We have not yet published a room addition project story, but the closest example on our site applies directly, because the same discoveries happen when an addition’s foundation goes in beside a 1950s house. In our ADU cost guide we describe a roughly 600 square foot detached unit the homeowner expected to cost about $180,000. Digging the foundation exposed the main house’s original clay sewer line under the new footprint, cracked and full of roots; rerouting it cost about $14,000. The 100-amp panel was full, and an electric range and heat pump forced a 200-amp upgrade at about $6,000 to $8,000 with about three weeks of utility delay. Then, walking through framed rooms, the owner upgraded tile, countertops, cabinets and HVAC, about $30,000 beyond the allowances. The unit finished at about $265,000. Two of those were conditions nobody could see and one was a decision made with better information, which is why the contingency is real money and why our proposals state every allowance before demolition.

Room addition or ADU: which costs less?

Per square foot, the two are close. Our published figures put a detached 500 square foot ADU at $180,000 to $260,000 and ADU construction at $300 to $450 per square foot all-in, against $300 to $500 for a ground-floor addition; the ADU number includes a kitchen, a bathroom and its own utility connections. The real difference is what each buys. An addition makes the house you live in bigger. An ADU is a separate unit that can be rented or house a parent, and it can go where an addition cannot: under California Government Code Section 66323, a detached ADU of up to 800 square feet with 4-foot side and rear setbacks must be approved even where the lot’s floor-area cap would block an addition of the same size. On a lot at its 45 percent limit, the ADU is the only new square footage available.

How to compare room addition quotes

Ask every bidder for the same six things in writing; the cheap quote usually stops being cheap somewhere in this list.

1. Square footage. Conditioned area of the addition, plus any first-floor rooms reworked for a stair or a post.
2. Design, engineering and permits. Included, excluded or an allowance, and who answers plan check corrections.
3. Foundation and structure. The footing type assumed, whether a soils report is included, and whether seismic upgrades at the tie-in are in scope or “if required.”
4. Systems. Whether a panel upgrade, a new HVAC zone and new plumbing runs are included.
5. Exterior matching. Roof tie-in or whole-house re-roof, stucco to the full elevation or a patch, window brand and series.
6. Allowances. The dollar amount assumed for flooring, tile, fixtures, cabinets and lighting, so an upgrade later is a known number.

Green Design and Build puts all six in the proposal, with a fixed price for the defined scope and named allowances for selections you have not made yet. Our guide on how to hire a general contractor without getting scammed shows what a $28,000 kitchen became when none of this was written down.

Where we build room additions

Most of our additions are in the San Fernando Valley and the rest of Los Angeles County, where single-story post-war ranch houses leave room for a primary suite off the back or a second story over the garage wing, and where LADBS plan check and the floor-area cap shape most projects. In Orange County, city building divisions and HOA architectural review run side by side. Ventura County adds fire-zone construction on hillside and canyon lots, and western Riverside County adds expansive soils and tract-home HOAs in Corona, Eastvale and Murrieta. Every city and county we serve is listed on our service areas page.

Room addition cost FAQs

How much does a room addition cost per square foot in Los Angeles?

A room addition in Los Angeles typically costs $300 to $500 per square foot all-in for a ground-floor addition and $400 to $650 per square foot for a second story, including design, engineering, permits, construction and standard finishes. A dry bedroom on a flat lot sits near the bottom; a suite with a bathroom, a hillside foundation or a second story sits near the top. These are typical Los Angeles budgeting ranges, not a quote.

How much does a second-story addition cost in Los Angeles?

A second-story addition in Los Angeles typically costs $400 to $650 per square foot, or $200,000 to $350,000 for a 400 to 600 square foot partial second story and $350,000 to $650,000 or more for a full 800 to 1,200 square foot second story. The premium over a ground-floor addition pays for structural work through the first floor, removing and rebuilding the roof, the stair and a separate HVAC zone, plus several months of temporary housing for most families.

How much does it cost to add a primary bedroom and bathroom in Los Angeles?

Adding a ground-floor primary suite with a bathroom in Los Angeles typically costs $130,000 to $250,000 for 350 to 500 square feet. The bathroom is what separates a suite from a plain bedroom of the same size: drain and supply lines, a roof vent, waterproofing, tile and fixtures add the cost of a bathroom remodel on top of the shell. Finish level and whether the panel needs a 200-amp upgrade move the number within the range.

Is a room addition or an ADU cheaper in Los Angeles?

Per square foot they are close: a ground-floor room addition in Los Angeles runs $300 to $500 per square foot and ADU construction $300 to $450 per square foot, with a detached 500 square foot ADU at $180,000 to $260,000. The ADU price includes a kitchen and its own utility connections; the addition price assumes the space joins a house that already has them. On a lot at its floor-area limit, a detached ADU of up to 800 square feet is usually the only new square footage allowed.

How much contingency should I budget for a room addition?

Hold 15 to 20 percent of the accepted bid as a contingency for a room addition in Los Angeles, especially on a pre-1980 home. The tie-in opens walls, roof framing and foundation that have not been seen since the house was built; the common surprises are deteriorated sewer lines, a full 100-amp panel, undersized footings and dry rot at the roof edge. The contingency is separate from finish upgrades you choose during the build.

What does the permit for a room addition cost in Los Angeles?

Plan check, building permit and related city fees for a room addition in Los Angeles scale with the permit valuation and come on top of the drawings, structural engineering and the Title 24 report; we itemize all of them in the written estimate. Additions cannot use an LADBS Express Permit; they go through full Building Plan Check with staged inspections and a Certificate of Occupancy at the end. They are included in the all-in figures on this page.

Get a real number for your addition, not a per-square-foot guess

Tell us what you need the space for, and we will check setbacks, floor-area allowance, the foundation and the panel on a free site visit, then give you a written estimate that lists design, engineering, permits, structure, systems and named allowances line by line. If an ADU turns out to be the cheaper way to get the space, we will say so.

A Los Angeles general contractor typically charges in the range of $150 to $450 per square foot for remodeling and addition work, depending on the type of project, with smaller single-room remodels landing at the lower end and additions or ADUs landing at the higher end. Ground-up new construction sits above that range, at $300 to $600 per square foot all-in. There is no single flat rate, because the cost depends heavily on project type, scope, materials, and site conditions.

Rather than quoting one number that would not apply to most projects, here is how cost actually breaks down by project type in the Los Angeles market, along with the pricing structures contractors use and what tends to move a project from the low end of a range to the high end.

Typical Cost Ranges by Project Type

Kitchen Remodel

A full kitchen remodel in the Los Angeles area generally runs from $25,000 to $100,000 or more, depending heavily on cabinetry, countertop material, appliance package, and whether the layout is changing or staying the same. Moving plumbing or electrical to reconfigure a kitchen layout adds cost beyond a straightforward finishes-only remodel.

Our kitchen remodeling page explains how we scope and price a kitchen line by line.

Bathroom Remodel

Bathroom remodels typically fall between $10,000 and $30,000, with higher-end projects using custom tile work, freestanding tubs, or layout changes reaching $50,000 or more.

For a fuller breakdown by tier, read our bathroom remodel cost guide.

Full Home Renovation

A full home renovation covering most or all of a house commonly ranges from $100,000 to $300,000 or more, with the total driven primarily by square footage, how many rooms are involved, and whether structural or systems work (electrical, plumbing, HVAC) is part of the scope.

If you are adding square footage rather than renovating what exists, see our room additions page.

Accessory Dwelling Units (ADUs)

ADU costs vary the most of any category because there are several distinct types of projects grouped under the same name. A garage conversion ADU generally runs $100,000 to $200,000. A new detached ADU is priced more by size: roughly $180,000 to $260,000 for 400 to 500 square feet, $230,000 to $330,000 for 600 to 800 square feet, $280,000 to $385,000 for 800 to 1,000 square feet, and $325,000 to $445,000 for 1,000 to 1,200 square feet, with two-story detached units running $400,000 to $550,000. On a per-square-foot basis, new ADU construction in the LA market generally falls in the $300 to $450 per square foot range, which is meaningfully higher than a standard home addition due to the cost of extending utilities and building a fully independent structure.

We publish a full ADU cost breakdown, including a real project that went from $180,000 to $265,000.

These are typical Los Angeles budgeting estimates, not a price list or a quote. Your project can come in lower or higher depending on the house, the scope and the finishes; the only real number is a written proposal after a site visit.

Why the Range Is So Wide

Scope and Structural Work

Cosmetic work (new flooring, paint, fixtures) costs far less than structural changes (moving walls, reworking foundations, changing rooflines, or relocating plumbing and electrical). Any project that opens up walls or touches the structure of the home should be budgeted well above a finishes-only project of similar square footage.

Materials and Finish Level

Cabinetry, countertops, flooring, and fixtures carry an enormous price range on their own. Two kitchens of identical size and layout can differ by tens of thousands of dollars purely based on the materials selected.

Permits and Site Conditions

Projects requiring permits through the Los Angeles Department of Building and Safety (LADBS) or another local building department carry costs for plan review, permit fees, and inspections. Site conditions such as difficult access, older electrical panels that need upgrading, foundation issues discovered mid-project, or drainage problems can all add cost that a homeowner did not anticipate at the estimate stage.

Labor Market and Timeline

Labor costs in the LA market are shaped by demand for skilled trades at any given time, and a compressed timeline can also increase cost if it requires more crews working simultaneously.

How General Contractors Structure Pricing

Most residential general contractors in the LA market price projects one of two ways. A fixed-bid (or lump-sum) proposal quotes a single total price for the defined scope of work, which gives a homeowner cost certainty as long as the scope does not change. A cost-plus arrangement bills the actual cost of labor and materials plus an agreed contractor fee or percentage, which offers more flexibility on projects with scope that may evolve, but less certainty about the final number going in. Either structure can work well; what matters is that the proposal clearly states which one you are agreeing to and what happens if the scope changes.

Getting an Estimate You Can Actually Compare

A useful estimate should break down the scope of work, the specific materials or allowances included, and the payment schedule, not just a single bottom-line number. When comparing bids from multiple contractors, the lowest number is not automatically the best value if it is missing scope, using lower allowances than a competing bid, or leaving out permit costs that another contractor included. The most reliable way to get an accurate number for your specific project is a site visit and a written proposal that spells out exactly what is and is not included.

For what a project actually involves rather than what it costs, see the work we take on across Los Angeles, Ventura, Orange, western Riverside and western San Bernardino counties.

Every contractor claim in California can be checked in a few minutes, and the order matters: start with the CSLB contractor license, which is the only credential the state actually requires; then verify any specialty certification the contractor advertises, whether that is a green building certification, a manufacturer installer program or a trade credential; and for homes built before 1978, confirm EPA Lead-Safe certification.

Marketing labels get used loosely. “Green certified”, “certified installer” and “master craftsman” are not government licenses, and homeowners in Los Angeles often assume they are. Below is how we verify each claim ourselves, step by step, before we would hire anyone who advertises this way.

Start With the California Contractor’s License

Before any green credential matters, the contractor needs to hold an active, appropriately classified license issued by the Contractors State License Board (CSLB). You can look up any license for free using the CSLB’s online license search tool.

What to Check on the License Record

The CSLB record will show the license status (active, expired, revoked, or suspended), the classification (a B classification covers general building contracting), the bond status, and any disciplinary actions on file. As of January 1, 2023, California requires licensed contractors to carry a $25,000 contractor’s bond, which exists to compensate homeowners for losses tied to defective work or license law violations. If the bond shows as missing or lapsed, that is a serious red flag on its own, unrelated to anything about “green” claims.

You can run this check on us right now: verify licence #1110975 on the CSLB site.

Confirm Workers’ Compensation Insurance

The CSLB record also indicates whether a contractor carries workers’ compensation insurance, which is required in California for contractors with employees. A homeowner can be exposed to liability if an uninsured worker is injured on their property, so this is worth confirming independently rather than taking a contractor’s word for it.

Then Verify the Specific Green Certification Being Claimed

Once the license and bond check out, the next step is figuring out which green credential the contractor is actually referring to. A few show up most often in the Los Angeles market.

GreenPoint Rated

GreenPoint Rated is a California-specific residential green building rating program administered by Build It Green. It is one of the credentials most relevant to LA homeowners because it was built around California homes and California climate zones, covering categories like energy efficiency, indoor air quality, water conservation, and resource-efficient materials. Contractors and consultants who hold this credential are typically listed as certified GreenPoint Raters, and a homeowner can ask to see that certification directly rather than relying on a logo on a website.

LEED Accreditation

LEED (Leadership in Energy and Environmental Design), administered through the U.S. Green Building Council and Green Business Certification Inc., is more common on commercial and larger residential projects than on a typical single-family remodel. An individual can hold a LEED Green Associate or LEED AP credential, which reflects personal training rather than a project certification. If a contractor cites LEED, it is fair to ask whether they mean their own personal accreditation or that the finished project itself will pursue LEED certification, since those are two different things.

National Green Building Standard (NGBS)

NGBS is a green building framework aimed specifically at residential and multifamily construction, with certification tiers similar in concept to LEED’s. It is less commonly seen on smaller LA remodel projects but does appear on new home construction and larger multi-unit builds.

ENERGY STAR Partner

Being an ENERGY STAR partner relates primarily to installing ENERGY STAR-certified products and, for new construction, building to ENERGY STAR’s home certification requirements. It is a useful signal but a narrower one than a full green building rating.

For Older LA Homes, Ask About EPA Lead-Safe Certification

This one is not optional, and it is not really a “green” credential so much as a legal requirement. Under the EPA’s Renovation, Repair, and Painting (RRP) Rule, any firm paid to disturb paint in a home built before 1978 must be an EPA Lead-Safe Certified Firm, and the individuals performing that work must complete the required renovator training. A large share of the Los Angeles housing stock was built before 1978, so this applies more often than homeowners expect, particularly on older bungalows and mid-century homes in neighborhoods throughout the city. If your home falls into that category, ask directly whether the contractor and the firm are RRP-certified, and ask to see the certificate rather than taking a verbal yes.

Our whole-home renovation page explains how we handle EPA lead-safe practices on pre-1978 homes.

Ask for the Certificate, Not Just the Claim

A logo on a website or a truck wrap is not verification. Every credential described above comes with an actual certificate or a searchable record: a CSLB license number you can look up yourself, a GreenPoint Rater ID, a LEED credential ID searchable through the USGBC/GBCI credential directory, or an EPA Lead-Safe Certified Firm number. A contractor who is genuinely certified will not hesitate to provide these, because they are used to being asked.

Questions Worth Asking Directly

It helps to ask a contractor plainly which certification they hold, who issued it, and whether it applies to them personally or to the project as a whole. It also helps to ask what specifically the certification changes about how they will build your project, whether that is the materials they source, the insulation and air-sealing approach, water fixtures, or waste diversion during demolition. A contractor who understands their own certification will be able to answer in specifics. One who cannot explain what the certification actually covers is worth treating with more caution, regardless of what claims appear in their marketing.

The Short Version

Verifying a green-certified general contractor in Los Angeles means confirming an active CSLB license and bond first, then independently checking whichever specific green credential is being claimed, such as GreenPoint Rated, LEED, or NGBS, and separately confirming EPA Lead-Safe Certified status if your home was built before 1978. None of these checks take more than a few minutes each, and a legitimate contractor will expect you to run them.

You can verify our licence directly with the CSLB — #1110975 — and read more about Green Design and Build.

For the full checklist, read our guide to hiring a general contractor without getting scammed.

Updated September 2026. This guide now includes what a general contractor is responsible for and the five California-specific checks from our earlier hiring guides.

Hiring a general contractor should be the beginning of an exciting home improvement project. Unfortunately, for many homeowners, it becomes the beginning of a financial and emotional nightmare.

We have seen the same patterns repeat over the years: an unusually low estimate, a large deposit, a vague one-page contract, endless verbal promises, unexplained additional charges, and eventually a contractor who stops answering the phone.

The difficult part is that contractor scams do not always look like scams in the beginning. The person may seem knowledgeable, friendly, confident, and ready to start immediately. They may tell you exactly what you want to hear, especially when other contractors are quoting more money or giving you a longer lead time.

That is why protecting yourself is not about deciding whether someone seems trustworthy. It is about verifying their credentials, comparing the actual scope of work, requiring proper documentation, and maintaining financial control throughout the project.

A legitimate contractor should make themselves easy to verify—not ask you to rely on blind trust.

What a General Contractor Is Actually Responsible For

It is hard to judge whether a contractor is doing the job properly if you are not sure what the job is. In Los Angeles, a general contractor runs a project from first conversation to final sign-off, and that responsibility falls into three phases.

Before construction. The contractor defines the scope with you, produces an estimate that is either a fixed price or a cost-plus arrangement, prepares and submits the permit application to the Los Angeles Department of Building and Safety (LADBS) or your city’s building department, coordinates plan check, and lines up the trades the project needs: framers, electricians, plumbers, HVAC, roofers and finish trades. A design-build contractor also handles the design, which keeps the drawings and the buildable plan in one set of hands.

During construction. The contractor sequences the trades so framing is complete before electrical rough-in, and rough-in inspections pass before drywall closes the walls; orders materials early enough that long-lead items such as cabinets and windows do not stall the job; checks the work against the scope and the code at each stage rather than at the end; and tracks cost and schedule against the estimate, telling you in writing when either changes.

After construction. The contractor schedules the final inspections, walks the finished work with you, clears the punch list before asking for final payment, and, on new construction and ADUs, obtains the certificate of occupancy.

What a general contractor is not responsible for: financing your project, structural engineering calculations (a licensed engineer stamps those on anything beyond a simple opening), and decisions that are legally yours, such as final material selections and approving change orders. A good contractor guides you through those decisions; the decision and the paperwork behind it still come back to a written agreement between you and the contractor. Everything below is about making sure that agreement, and the person signing it, can be trusted. If you want to see the full range of work a residential contractor covers, our services page lists every category we build.

The Most Common General Contractor Scams and Red Flags

The Door-to-Door Pressure Pitch

Be careful when someone shows up at your home unexpectedly and says they noticed roof damage, recently completed a project nearby, or have leftover materials they can offer at a special price.

The offer usually comes with artificial urgency:

• The price is only available today
• Materials must be purchased immediately
• Their crew is already in the neighborhood
• Another customer supposedly canceled
• You must sign now to secure the discount

A professional contractor should give you enough time to review the proposal, verify the company, compare estimates, and understand the contract. Pressure to sign immediately is not a benefit. It is a warning.

A Large Upfront Deposit

One of the biggest red flags is a contractor asking for 50% or more before starting—or requesting the entire project amount upfront.

Once a contractor has most of your money, you have very little financial leverage if work slows down, quality declines, or the contractor disappears.

Deposit laws vary by state. Because we work in California, homeowners should know that the down payment on most home improvement contracts generally cannot exceed $1,000 or 10% of the contract price, whichever is less. Additional payments should not exceed the value of work performed or materials delivered.

A safer payment structure includes:

• A legally compliant initial deposit
• Progress payments tied to completed construction milestones
• Written confirmation before each payment
• A reasonable final balance held until the walkthrough and punch list are complete

Never allow the payment schedule to get too far ahead of the work.

Cash Only and No Written Contract

Cash is not automatically evidence of fraud, but a contractor who insists on cash, refuses traceable payment methods, or does not want to provide a detailed contract should not be hired.

Without a written agreement, there may be no reliable record of:

• What work was included
• Which materials were promised
• How much the project should cost
• When work was supposed to begin and end
• Who was responsible for permits
• What warranty was included
• How changes were supposed to be approved

A verbal promise is difficult to enforce after a disagreement begins.

A Missing, Expired, or Unrelated License

Never accept a license number simply because it appears on a business card, truck, estimate, or contract.

We have seen license numbers that were expired, suspended, issued to another business, or limited to a completely different construction trade.

Look up the license directly through your state licensing agency. California homeowners can use the Contractors State License Board’s license-check system to verify the license status and confirm that the information matches the contractor being considered.

Confirm that:

• The license is active
• The business name matches
• The license classification covers the proposed work
• The contractor’s bond and workers’ compensation information are current
• Any publicly disclosed disciplinary history has been reviewed

Insurance That Cannot Be Verified

Ask for proof of general liability insurance and workers’ compensation coverage when applicable.

Do not rely only on a photocopy or screenshot. Request a current Certificate of Insurance and confirm it with the insurance agent or carrier listed on the certificate.

The document should accurately identify the insured business, policy number, effective dates, expiration dates, and insurance company. California’s CSLB similarly requires workers’ compensation certificates submitted for licensing purposes to contain identifying policy and coverage information and to be issued by an authorized insurer.

Also ask how subcontractors are covered. An uninsured worker getting injured on your property can create a much larger problem than the project itself.

An Estimate That Is Dramatically Lower Than Every Other Bid

Homeowners understandably want to save money, but a bid that is thousands of dollars below comparable proposals should be investigated carefully.

A low estimate may be based on:

• Missing work
• Unrealistically low material allowances
• Unlicensed or uninsured labor
• Cheaper materials
• No permits
• An incomplete understanding of the project
• Future change orders that have not yet been disclosed

The lowest number is not necessarily the lowest final cost.

Some contractors use a low initial price to secure the project. Once the home is opened up and the homeowner feels committed, additional charges begin appearing. Other contractors simply cut corners in areas the homeowner cannot easily see.

Compare the scope, specifications, allowances, exclusions, and payment terms—not only the total.

Compare any bid with what a Los Angeles general contractor should cost per square foot.

A Vague Scope of Work

A contract that says “remodel bathroom” or “renovate kitchen” does not provide enough protection.

What kind of cabinets will be installed? Which countertop material is included? How much flooring? Which fixtures? Who is painting? Are demolition, disposal, permits, cleanup, appliances, finish materials, and inspections included?

If those details are not written into the agreement, the contractor may be able to substitute lower-quality materials while arguing that the contract has still been fulfilled.

The more detailed the scope, the less room there is for misunderstandings.

Avoiding Required Permits

Some contractors tell homeowners that permits are unnecessary, too expensive, or likely to delay the job. Sometimes a permit truly is not required, but that decision should be based on the actual scope and local building requirements—not the contractor’s desire to avoid inspections.

Unpermitted construction can create problems when selling or refinancing a property, filing an insurance claim, or correcting work that does not comply with code.

A professional contractor should be willing to explain:

• Which permits are required
• Who will obtain them
• What inspections will occur
• Whether permit fees are included
• How corrections will be handled

Permits should be addressed in writing before construction begins.

Using Your Money to Finance Another Project

Contractors sometimes use deposits from new customers to pay labor or material bills from older projects. This is commonly referred to as project float.

The cycle may work temporarily, but once new money stops coming in, multiple projects can stall at the same time. Homeowners are then left with unfinished work while the contractor tries to move money between jobs.

Warning signs may include:

• Large deposits
• Constant requests for early payments
• Materials that never arrive
• Subcontractors complaining that they have not been paid
• Sudden schedule gaps
• Excuses that change from week to week
• Pressure to release the next payment before the current milestone is complete

Milestone-based payments help prevent your project funds from getting too far ahead of your project.

How to Verify a General Contractor Before Signing

The verification stage is where many homeowners make mistakes. They are excited to begin, they like the design, or they finally found someone available, so they skip the background work.

That is exactly where many scams get through.

In California it comes down to five checks that matter more than anything in a sales pitch: an active, correctly classified CSLB license; insurance and a bond you have verified yourself; real experience with permits in your city; multiple bids that are actually comparable; and a contract detailed enough to prevent a dispute later.

Verify the License Yourself

In California, use the Contractors State License Board’s Check a License page. Do not rely on a number printed on a truck or a screenshot the contractor sends you; look it up directly. The record shows whether the license is active, its classification (a Class B General Building license covers whole-home remodels, additions and ADUs), whether the required $25,000 contractor’s bond is current, whether workers’ compensation is on file, and any disciplinary history. Our own license, CSLB #1110975, is a good example of what a clean record looks like.

Check the license number, status, classification, business name, and any available bond, insurance, or disciplinary information.

The business on the contract should match the business associated with the license. Ask questions when names, addresses, or classifications do not line up.

Confirm the Insurance Independently

Request proof of general liability and workers’ compensation coverage when applicable. Ask for the certificate to be sent directly from the insurance agent or call the listed agent to verify that the policy is active.

Also ask whether subcontractors maintain their own insurance or are covered under the general contractor’s policy.

Review Complaints and Business History

Look beyond star ratings.

Search for:

• Complaints through the licensing agency
• Better Business Bureau history
• Lawsuits and public court records
• Mechanic’s liens
• Repeated allegations of abandonment
• Complaints involving deposits or unpaid subcontractors
• Multiple short-lived businesses connected to the same operator

One negative review does not necessarily prove that a contractor is dishonest. Construction projects are complicated, and disputes happen. A pattern of unresolved complaints is much more concerning.

Pay attention to how the contractor responds. Professional responses focus on facts and attempted solutions. Aggressive, insulting, or threatening responses can tell you how the contractor may communicate during your project.

Call Recent Local References

Ask for at least two or three projects completed within the past six to twelve months, preferably projects similar to yours.

Do not ask only whether the homeowner was happy. Ask specific questions:

• Did the project remain close to the original budget?
• Were change orders explained before the work was performed?
• Did the contractor communicate consistently?
• Was the project completed reasonably close to schedule?
• Were required permits and inspections handled?
• Did subcontractors appear organized and supervised?
• Were punch-list items completed?
• Was the contractor responsive after final payment?
• Would you hire the company again?

When appropriate and with permission, visit a completed project or at least drive by it. Photos can show attractive finishes, but they do not tell you how the contractor managed the process.

Verify the Business Entity

Search the business through the applicable state business registry. Confirm that the entity is active and that its name is consistent with the proposal, license, insurance, and contract.

Be cautious when a contractor has operated through several different companies over a short period. There may be an innocent explanation, but frequent business changes can also be used to distance someone from complaints, debts, warranties, or prior projects.

Ask How Long They Have Been Doing This Kind of Work

Experience shows up in the parts of a project you cannot see from the estimate: anticipating what the inspector will ask for, sequencing the trades so nobody waits, and handling the surprise behind the drywall without stopping the job. In our experience, contractors with fewer than five years of hands-on work can struggle to manage timelines, inspections and code requirements on larger remodels. Ask how many projects like yours they have completed in your city, and ask to see one.

Get Multiple Comparable Bids

We generally recommend obtaining at least three bids for a substantial project.

However, three different totals do not help unless the contractors are pricing approximately the same scope. One proposal may include permits, demolition, disposal, finish materials, painting, cleanup, and electrical upgrades, while another excludes half of those items.

Ask each contractor to clarify:

• What is included
• What is excluded
• Which material allowances are being used
• Which products or brands are specified
• Which permits are included
• How unforeseen conditions will be handled
• What could reasonably increase the price

The goal is not simply to collect three numbers. The goal is to compare three versions of the same project.

Ask Who Actually Manages the Work

Some contractors manage every trade and phase with their own project manager; others act mainly as a coordinator between separate subcontractors and, sometimes, a separate designer. Neither model is wrong, but it changes who is accountable when something does not go to plan. Ask directly who will be on site managing the work day to day, who you call when an issue comes up mid-project, and whether design and construction are handled by the same company. A vague answer here is a preview of the finger-pointing that happens later when a detail does not fit.

Questions to Ask During the Estimate

The site visit tells you as much about a contractor as the number at the bottom of the proposal. Five questions worth asking every bidder:

• Are you licensed and insured, and can I see the certificates?
• What is the payment schedule, and which milestone does each payment correspond to?
• Who will be my single point of contact from the first day to the final inspection?
• What exactly is included, and what is excluded? Most disputes start with something a homeowner assumed was in the price.
• What change orders could realistically come up on this house, and how will you price them before the work is done?

A professional answers all five without hesitation. A contractor who deflects on any of them is telling you how the project will go.

What a Strong General Contractor Agreement Should Include

The contract is your safety net if something goes wrong. It should not be treated as paperwork that needs to be signed quickly so construction can begin.

California’s CSLB advises homeowners to ensure financial terms are clear, including the total price, payment timing, and cancellation provisions.

A Detailed Scope of Work

The agreement should describe the project with enough detail that another construction professional could understand what is being provided.

Depending on the project, this may include:

• Demolition and disposal
• Dimensions and square footage
• Cabinet brands and configurations
• Countertop material
• Flooring type
• Fixture and appliance models
• Paint specifications
• Electrical and plumbing work
• Waterproofing
• Insulation
• Finish materials
• Cleanup and site protection
• Permit and inspection responsibility

Do not assume something is included because it was discussed during the walkthrough. If it matters, put it in writing.

An Itemized Cost Breakdown

Labor, materials, allowances, permits, and major project categories should be clearly identified.

An itemized proposal makes it easier to compare bids and evaluate later changes. A single lump-sum number can make it difficult to determine whether an added charge is reasonable or whether the work was already included.

A Milestone-Based Payment Schedule

Payments should be tied to measurable progress rather than arbitrary calendar dates.

Possible milestones include:

• Initial deposit
• Completion of demolition
• Completion of underground or in-wall rough work
• Approval of rough inspections
• Drywall or waterproofing completion
• Cabinet or finish installation
• Substantial completion
• Completion of the final punch list
• Approval of the final inspection

Do not release payment merely because a certain number of weeks has passed. Release it because the corresponding work has been completed.

Start and Completion Information

The contract should state the anticipated start date, estimated duration, and factors that may reasonably affect the schedule.

Construction delays can happen because of inspections, weather, product availability, concealed damage, engineering requirements, or owner-requested changes. A good agreement distinguishes legitimate delays from poor planning or abandonment.

A Written Change-Order Process

Any change to the scope, materials, price, or schedule should be documented and approved before the additional work is performed.

The change order should explain:

• What is changing
• Why it is changing
• The added or reduced cost
• Any schedule impact
• Whether related work is included
• Who authorized it

Do not depend on text messages, hallway conversations, or verbal statements involving thousands of dollars.

Permit and Inspection Responsibility

The agreement should identify who will obtain permits, who will pay the fees, which inspections are anticipated, and whether correction work is included.

Never assume the contractor is handling permits unless the contract says so.

Lien Releases

Even when a homeowner pays the general contractor, unpaid subcontractors or suppliers may have legal remedies involving the property.

The contract and payment process should address conditional and unconditional lien releases from the appropriate contractor, subcontractors, and suppliers as payments are made.

This is one of the protections homeowners most often overlook.

Warranty Terms

The warranty should identify:

• What workmanship is covered
• How long the coverage lasts
• What is excluded
• How warranty requests must be submitted
• Which products carry separate manufacturer warranties
• Who is responsible for manufacturer warranty coordination

A verbal promise that “we’ll take care of anything” is not a warranty policy.

Cleanup, Protection, and Damage Responsibility

The contract should explain how the contractor will protect existing flooring, furniture, landscaping, driveways, and areas outside the active work zone.

It should also address debris removal, dust control, daily cleanup expectations, and responsibility for damage caused during construction.

Final Walkthrough and Punch List

The agreement should include a process for inspecting the completed work, documenting remaining items, and resolving them before final payment.

A contractor should not treat your request to correct incomplete or deficient work as an inconvenience. The final walkthrough is a normal part of professionally closing a project.

Cancellation Rights

Cancellation laws depend on the state, contract type, location where the agreement was signed, and other circumstances.

In California, qualifying home solicitation contracts generally include a three-business-day cancellation right, with the required cancellation notice provided as part of the contract. Homeowners should read the cancellation language carefully rather than assuming every contract follows the same rules.

The $28,000 Kitchen Remodel That Became a Nightmare

One case stays with us because it involved almost every warning sign discussed above.

A homeowner collected three estimates for a full kitchen remodel. The project included new cabinets, countertops, flooring, and electrical work for updated lighting.

Two bids were around $45,000. The third was $28,000.

The contractor offering the lowest bid said he had recently completed a large job nearby and had leftover materials. He claimed he could pass the savings along. He was also able to start within one week, while the other contractors had approximately two-month waiting periods.

The homeowner chose the $28,000 proposal.

What a properly scoped kitchen looks like is on our kitchen remodeling page.

The Deposit Was 60%

The contractor requested $16,800 upfront to order materials.

She paid it.

That payment immediately put the contractor in control. He had most of the money he needed from her before completing a meaningful portion of the project.

The Contract Was Only One Page

The agreement essentially said:

“Remodel kitchen, cabinets, countertops, flooring, electrical — $28,000.”

There were no cabinet specifications, countertop details, material allowances, payment milestones, permit responsibilities, or firm dates. The only timeline was a general promise of six to eight weeks.

Demolition Created a False Sense of Progress

The contractor demolished the kitchen quickly. That made the homeowner feel like the project was moving and reassured her that she had made the right decision.

Then progress slowed.

He would work for one day and disappear for four. He repeatedly said he was waiting for materials, but he could not provide reliable delivery information.

Demolition is fast. Completing a project properly is where organization, cash flow, licensing, scheduling, and trade coordination matter.

The Verbal Upcharges Began

The contractor said the electrical panel needed an upgrade for the new lighting. He requested another $4,000.

He later claimed the subfloor had water damage and needed to be replaced for an additional $3,500.

Neither change was documented through a written change order. The homeowner paid because her kitchen was already torn apart and she felt that she had no choice.

This is how homeowners become financially trapped. Once the house is disrupted, saying no feels much harder than it did before work started.

The Contractor Disappeared

At approximately 60% completion, he stopped showing up.

Some of the cabinets had been installed, but many did not have doors. The countertops had never been ordered. Electrical work was incomplete, exposed wiring remained, and no inspection had been scheduled.

Eventually, the phone number on the contract was disconnected.

When we became involved, we discovered that no permit had been pulled for the electrical work. The license number on the contract belonged to a plumbing license rather than a general building contractor, and it had expired approximately eight months before the project began.

By the time he disappeared, the homeowner had paid around $24,000.

She then had to hire another contractor at close to the proper market cost to complete the project. She also faced permit, inspection, and code-correction expenses because portions of the electrical work had to be redone.

The Warning Signs Were There From the Beginning

The $17,000 difference between the bids was not a bargain. It was a warning.

The 60% deposit gave the contractor more of the homeowner’s money than the amount of completed work justified.

The vague contract made it almost impossible to prove which products or services had been promised.

The license was never independently verified.

The additional $7,500 was approved verbally, leaving no proper change-order documentation.

This homeowner was intelligent and capable. She was not broadly careless. Each decision felt reasonable in the moment because she was excited, wanted to save money, and was being told exactly what she wanted to hear.

That is why homeowners need a process. Excitement can influence judgment, but a verification checklist does not change based on how friendly or convincing the contractor seems.

Green Flags of a Trustworthy General Contractor

Avoiding red flags is important, but homeowners should also know what professionalism looks like.

You can read who we are and how we run jobs on our About page.

They Ask Questions Before Trying to Sell You

A trustworthy contractor wants to understand:

• Your goals
• Your budget range
• Your timeline
• Your priorities
• Your must-haves
• Your preferred finish level
• How you use the space

They generally will not provide a firm price for a substantial remodel without seeing the property. Actual estimates require measurements, existing-condition assessments, and an understanding of the complete scope.

They Conduct a Thorough Site Visit

During the site visit, a professional contractor measures, takes photographs, asks questions, and looks for conditions that could affect cost.

For example, they may inspect:

• Electrical panel capacity
• Access for plumbing or mechanical work
• Signs of leaks or water damage
• Existing flooring and subfloor conditions
• Structural concerns
• Material access and staging areas
• Protection requirements
• Permit implications

A responsible contractor would rather identify a concern before signing than surprise you after demolition.

Their Estimate Takes Time

A full remodeling proposal produced immediately after the walkthrough may be based more on guessing than estimating.

A detailed estimate takes time because the contractor may need to calculate labor, confirm material costs, speak with subcontractors, review permit requirements, and organize the scope.

Speed is not always professionalism. Sometimes careful preparation is the better sign.

They Do Not Pressure You to Sign

A legitimate contractor should expect homeowners to:

• Compare bids
• Check the license
• Verify insurance
• Call references
• Read the contract
• Ask questions
• Take time to decide

They should not become defensive because you are performing basic due diligence.

They Explain the Payment Schedule

A trustworthy contractor can explain why each payment is due and what will be completed before that payment is requested.

They do not need a massive upfront payment to keep their business operating. They also do not constantly ask to move payment dates forward.

They Pull Required Permits

They discuss permits early, obtain them at the proper stage, and schedule inspections when required.

They do not tell you to hide work from an inspector or describe permit avoidance as a benefit.

They Communicate Before You Have to Chase Them

Professional communication does not mean there will never be delays or complications. It means you are informed before you have to repeatedly ask.

A good contractor communicates about:

• Schedule changes
• Material delays
• Inspection results
• Unforeseen conditions
• Decisions needed from the homeowner
• Change orders
• Upcoming payments
• Punch-list scheduling

Problems happen in construction. Silence and avoidance are the larger concern.

They Document Changes Before Performing Them

Unexpected conditions are not automatically evidence of dishonesty. A wall can contain damaged plumbing, unsafe wiring, termite damage, or structural problems that were not visible before demolition.

The difference is how the contractor handles the discovery.

A professional contractor documents the condition, explains the available options, provides the cost and schedule impact in writing, and receives authorization before proceeding.

They Protect the Home

Floor protection, dust barriers, debris control, organized staging, and daily cleanup demonstrate how seriously a contractor treats the homeowner’s property.

The work zone may not be perfectly clean during construction, but it should be managed safely and professionally.

They Manage Their Subcontractors

Homeowners should not receive calls from subcontractors asking why they have not been paid.

The general contractor should coordinate trades, communicate expectations, inspect work, manage scheduling, and address payment issues directly.

A disorganized subcontractor network often leads to delays, quality problems, and lien concerns.

They Complete the Punch List Before Demanding Final Payment

Near completion, the contractor should walk the project with the homeowner and document remaining items.

They should not rush the walkthrough, dismiss legitimate concerns, or demand full payment while meaningful work remains incomplete.

They Remain Reachable After Completion

A trustworthy contractor provides written warranty information and responds when legitimate issues arise.

Not every callback indicates defective work. Homes settle, fixtures occasionally require adjustment, and small issues may appear after a space begins being used.

How a contractor responds after final payment says a great deal about the company.

Here is what those green flags look like as a process. Ours runs in six steps: a consultation about goals, budget and timeline; a site visit before any number is quoted; a design and written proposal that spells out scope, materials and cost; a signed contract with the permits pulled by us, not you; construction managed in-house by one project manager; and a final walkthrough against the agreed scope before we consider the job complete. It is described in full on our About page. Any contractor you are considering should be able to describe their own version of it just as plainly.

Documentation Is Not a Sign of Distrust

The biggest difference between a trustworthy contractor and a risky one is not personality.

It is transparency.

A legitimate contractor makes their license, insurance, references, scope, payment schedule, and warranty easy to verify. They are not offended when you ask questions because they are not worried about what the answers will reveal.

Be cautious whenever a contractor asks you to accept trust without documentation:

• “Don’t worry about the permit.”
• “We’ll finish the contract later.”
• “Just pay me directly and we’ll handle everything.”
• “You don’t need the change order in writing.”
• “The insurance certificate is at the office.”
• “This price is only available if you sign today.”

Documentation is not about accusing someone of being dishonest. It is simply how legitimate construction business should be conducted.

Final Checklist Before Hiring a General Contractor

Before signing, make sure you have:

• Independently verified the contractor’s license
• Confirmed current insurance coverage
• Checked recent references and complaint history
• Compared multiple bids based on the same scope
• Reviewed a detailed written contract
• Confirmed the deposit complies with state law
• Established milestone-based progress payments
• Identified permit and inspection responsibilities
• Required written change orders
• Addressed lien releases
• Reviewed warranty and cancellation terms
• Established a final walkthrough and punch-list process

Do not hire someone solely because they are likeable, available immediately, or significantly cheaper than everyone else.

Hire the contractor who is organized, transparent, properly documented, adequately insured, appropriately licensed, and willing to earn your trust through a professional process.

The right contractor will not make verification difficult. They will welcome it.

You can check our own licence at any time — CSLB #1110975 — and see what we build on our services page or read about the company on our about page.