Construction and Remodeling Services in Los Angeles and Southern California
Green Design and Build is a licensed general contractor (CSLB #1110975) based in Van Nuys that designs, permits and builds ADUs, kitchens, bathrooms, additions, whole-home renovations, foundations and outdoor living for homeowners across Los Angeles, Orange and Ventura counties and the western Inland Empire. Roof replacement and repair is performed and permitted under a C-39 Roofing license, by a roofing contractor scheduled and supervised by us.
Our Services
Quality Construction and remodeling
ADU Construction
Add valuable living space with custom ADUs designed for comfort, functionality, and investment.
Bathroom Remodeling
Upgrade your bathroom with modern designs, quality materials, and expert craftsmanship.
Electrical
Safe and professional electrical installations, upgrades, and lighting solutions tailored to your home’s needs.
Flooring
Enhance your home’s beauty and durability with professionally installed flooring solutions.
Foundation & Structural
Restore stability and peace of mind with professional foundation repair and reinforcement services.
Full Home Renovation
Reimagine your living space with comprehensive home renovation services that enhance comfort, style, and value.
Garage Conversion
Convert underutilized garage space into a functional and valuable living area.
Kitchen Remodeling
Create a beautiful, functional kitchen designed for everyday living and lasting value.
New Home Construction
Custom homes, teardown rebuilds, hillside lots and SB 9 second homes, designed, permitted and built under one contract.
Outdoor Living
Transform your backyard into the perfect space for relaxing, entertaining, and making memories.
Painting
Refresh and protect your property with high-quality interior and exterior painting services.
Patio Cover
Expand your outdoor living space with custom patio covers built for comfort and style.
Pavers
Create stunning outdoor spaces with durable paver driveways, walkways, and patios.
Plumbing
Reliable plumbing solutions designed to improve functionality, efficiency, and long-term performance throughout your property.
Remodeling Services
Transform your home with expert remodeling solutions tailored to your lifestyle, needs, and budget.
Roof Replacement and Repair
Roof replacement, repair and tile lift-and-relay, managed by us as your general contractor, with the permit and any deck repair put in writing.
Room Additions
Expand your living space with seamless room additions designed to match your home.
Windows & Doors
Improve energy efficiency, security, and curb appeal with expertly installed windows and doors.
Backyards, Driveways and Outdoor Living
The same crew that remodels the inside builds the outside
Concrete, pavers, patio covers, retaining walls, turf, fencing, outdoor kitchens and full backyard makeovers, designed, permitted and built by one licensed contractor across Los Angeles, Orange, Ventura, western Riverside and western San Bernardino counties.
Backyard Remodels
Design-build for the whole yard: grading and drainage first, then surfaces, structures and planting, under one contract.
Concrete Driveways
Driveway replacement from the base up, with the approach, the drainage and any city permit handled as part of the job.
Concrete Patios
Broom, stamped and exposed-aggregate flatwork on a compacted base, the step that decides whether a slab cracks.
Pavers
Driveways, walkways, patios and pool decks that can be lifted and reset if a root or a pipe ever moves them.
Patio Covers & Pergolas
Alumawood, insulated, wood and louvered covers, permitted and built on real footings.
Retaining Walls
Engineered walls with the drainage built in behind them, so the wall is still straight in ten years.
Artificial Turf
Artificial turf on a base that stays flat, with the edges pinned and the drainage handled underneath.
Outdoor Kitchens
Grill islands and full outdoor kitchens with the gas, water and electrical permitted and run properly.
Decks
Composite and redwood decks on engineered framing, with railings and stairs to code.
Also: Fencing & Gates Landscaping & Irrigation Fire Rebuild What a backyard remodel costs
What Green Design and Build does
Green Design and Build is a licensed California design-build general contractor (CSLB #1110975), based in Van Nuys and working across Los Angeles County, the San Fernando Valley, Orange County, Ventura County, western Riverside County and western San Bernardino County. Design, permitting and construction are handled by one company under one contract, with the structural calculations and Title 24 energy documents produced by a licensed engineer and an energy consultant we coordinate, which is the practical difference between a design-build contractor and hiring an architect and a builder separately.
We take on residential work from a single bathroom through to a whole-house rebuild: additions and ADUs, kitchens and baths, foundations, electrical and plumbing, flooring and paint, and everything outside the house: concrete, pavers, patio covers, retaining walls, turf, fencing, outdoor kitchens and landscaping. Below is every service we offer, what a job of that type typically costs across Southern California, and where to read the detail.
What we build, and what it costs in Los Angeles
These are the ranges we quote from. Each links to a full cost breakdown showing what moves a project to the top or the bottom of its range.
| Service | Typical Los Angeles cost | Detail |
|---|---|---|
| ADU construction | Garage conversion ADU $100,000–$200,000; JADU $60,000–$150,000; detached ADU $180,000–$450,000 or more by size | ADU cost guide |
| Garage conversion | $100,000–$200,000 | Garage conversion cost |
| Room additions | $300–$500 per sq ft ground floor; $400–$650 second story | Room addition cost |
| Kitchen remodeling | $25,000–$100,000+ | Kitchen remodel cost |
| Bathroom remodeling | $8,000–$80,000+ | Bathroom remodel cost |
| Whole-home renovation | $100–$500 per sq ft of house | Whole-home renovation cost |
| New home construction | $300–$600 per sq ft | Cost to build a house in LA |
| Roof replacement and repair | $12,000–$65,000 for a 1,500–2,000 sq ft single-story house. Roofing is performed and permitted under a C-39 Roofing license, by a roofing contractor scheduled and supervised by us. | Roof replacement cost |
| Foundation & structural | $500 for a single crack to $30,000+ for major work | Foundation repair cost |
| Seismic retrofit | $3,000–$15,000 for bolt-and-brace on a raised-foundation house; engineered hillside or stepped-foundation retrofits $15,000–$40,000+ | Earthquake Brace + Bolt grant |
| Pavers & hardscape | $15–$25+ per sq ft installed | Paver patio cost, Backyard remodel cost |
| Concrete & driveways | $8–$18 per sq ft; stamped $12–$26 | Concrete patio cost, Driveway replacement cost, Stamped concrete cost |
| Retaining walls | $30–$95 per sq ft of wall face, plus engineering and permits when the wall is over 4 ft measured from the bottom of the footing | Retaining wall cost |
| Artificial turf | $12–$18 per sq ft installed; pet systems $15–$22 | Artificial turf cost |
| Fencing & gates | $35–$110 per linear foot for wood or vinyl; block walls $130–$240 | Vinyl fence cost |
| Outdoor kitchens, decks & pergolas | Kitchens $6,000–$85,000+ by tier; decks $35–$95 per sq ft | Outdoor kitchen cost, Pergola cost |
| Landscaping & irrigation | $6–$30 per sq ft planted; drip and lighting per item | Backyard remodel cost |
| Patio covers | $25–$110 per sq ft installed | Patio cover cost |
| Outdoor living & backyards | $13,000–$70,000 for a full yard | Backyard remodel cost |
| Flooring | Quoted by area and material | Hardwood floor cost, Vinyl plank flooring cost, Flooring guide |
| Painting | Quoted by area and preparation required | Interior painting cost, Exterior painting cost, Hiring a painter |
| Electrical | Panel upgrades, rewires, outdoor circuits | Panel upgrade cost |
| Plumbing | Repipes, relocations, gas lines | Sewer line replacement cost |
| Windows & doors | Quoted per opening | Window replacement cost |
| Fire rebuild | Like-for-like rebuilds after the Palisades and Eaton fires | Fire rebuild guide |
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.
Load-bearing wall removal, which comes up in most open-plan kitchen projects, runs $10,000 to $25,000 on a single-story house — see removing a load-bearing wall. Our full pricing approach is on the pricing page, and financing options are set out separately. Our cost guides, permit explainers and planning advice for homeowners are collected in the resource center.
How a project runs with us
One contract covers design through final inspection, so there is no gap between the person who drew it and the people who build it.
- Site walk and feasibility. We look at the property, what the zoning and the existing structure allow, and give you a realistic range before anyone pays for drawings.
- Design and engineering. Plans produced in-house; structural calculations and Title 24 energy documentation are produced by a licensed engineer and an energy consultant, coordinated under our contract.
- Permitting. We submit, answer plan-check corrections and pull the permits. This is where most owner-managed projects stall.
- Construction. One superintendent, our own crews for the core trades, and a schedule you can see.
- Inspections and closeout. We carry the job through final sign-off, and the work is covered by our warranty.
The longer version, including what happens at each stage and who you deal with, is on the design-build process page.
Where we work
We build across five counties. County pages: Los Angeles County, Orange County, Ventura County, western Riverside County and western San Bernardino County. Cities we work in most often include Van Nuys, Sherman Oaks, Encino, Studio City, Woodland Hills, Northridge, Burbank, Glendale, Pasadena, Santa Clarita, Thousand Oaks, Irvine, Anaheim, Corona, Ontario and Rancho Cucamonga. The complete list is on areas we serve.
License, insurance and warranty
We hold California contractor license CSLB #1110975, which you can verify directly on the CSLB license check. We are licensed, bonded and insured, and carry workers’ compensation for our crews. Our workmanship warranty is written into the contract. Homeowner reviews are on our reviews page, and if you are comparing contractors, our guide to hiring a general contractor without getting scammed explains exactly what to check before you sign anything — including the license status of whoever else you are talking to.
Recent projects
A sample of completed work across the services above, photographed by our own crews.
- Kitchen Remodel in Pasadena — a load-bearing wall taken out, cabinetry to the ceiling, quartz counters and an island with seating.
- Complete Home Remodel in Encino — a full interior remodel: white kitchen with a waterfall island, dark stone bathrooms and a feature fireplace wall.
- Irvine Bathroom Remodel — a corner platform tub and builder-grade vanity replaced with a freestanding tub and walk-in shower.
- Garage-to-ADU Conversion in Los Angeles — an unused detached two-car garage converted into a roughly 500 sq ft ADU with its own kitchen, bathroom and entrance.
- Anaheim Paver Driveway and Side Yard — bare dirt taken through excavation, compacted base and finished pavers with drains set flush.
- Roof Replacement in Newport Beach — a full tear-off and replacement.
More completed work, with before, during and after photographs, is in the project gallery.