Full-Service Construction & Remodeling Across Southern California
Green Design & Build is a full-service construction company providing everything from kitchen and bathroom remodeling, ADUs and room additions to complete home renovations, new construction, roofing, outdoor living, and more. We handle projects of every size from design and planning through construction and completion.
Proudly serving homeowners throughout Los Angeles County, Ventura County, Orange County, and Riverside County, Green Design & Build is your one-stop source for quality construction, remodeling, and home improvement.
Design-Build Contractor in Van Nuys, Serving Los Angeles County
Design, Permits and Construction Under One License
Green Design and Build is a licensed residential design-build contractor based in Van Nuys. We build ADUs and garage conversions, kitchen and bathroom remodels, room additions and whole-home renovations for homeowners across Los Angeles, Ventura, Orange and Riverside counties. Our team is committed to providing expert craftsmanship, transparent communication, and a seamless construction experience—from the initial consultation through the final walkthrough.
Proudly serving Los Angeles, Ventura, Orange and Riverside counties, including the San Fernando Valley
Why Choose Us
Licensed & Insured
Fully licensed and insured for your peace of mind on every project.
Transparent Pricing
Detailed estimates upfront with no hidden fees or surprise charges
Quality Materials
We use only premium materials from trusted suppliers and manufacturers
On-Time Completion
We respect your timeline and deliver projects on schedule
Our Process
From the first conversation to the final walkthrough, here is what working with us looks like.
1. Consultation
We start with a conversation about your goals, your property, and your budget.
2. Site Visit
We assess the property in person and talk through what is realistic for your space. The visit itself takes about two hours.
3. Design & Proposal
We put together a design direction and a clear, itemized proposal, usually within about 48 hours of the site visit.
4. Contract & Permits
We finalize the agreement and pull any required permits before work begins. The paperwork takes about a week. Plan check is out of our hands — how long it runs depends on your city’s building and safety department.
5. Construction
We manage every trade in-house and keep you updated throughout the build. How long this takes depends on the size of the job.
6. Final Walkthrough
We walk the finished project with you and resolve anything on the punch list. We are not finished until every inspection has passed.
ADU Rules Calculator: What Your City Must Allow on Your Lot
California law sets a floor that no city, Los Angeles included, is permitted to go below. Answer a few questions about your lot and see the exact size, height, setbacks, parking and impact fees your city has to allow you.
Check my lotEvery answer cites the section of the Government Code it comes from. Los Angeles also publishes a set of pre-approved ADU standard plans — we explain how those work.
Our Services
Quality Construction and remodeling
ADU Construction
Add valuable living space with custom ADUs designed for comfort, functionality, and investment.
Backyard Remodeling
Transform your outdoor space with custom backyard designs built for relaxation, entertainment, and lasting enjoyment.
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.
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.
Roofing
Protect your home with reliable roofing systems built for performance and long-term durability.
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.
Google Reviews for Green Design and Build
Rated 5 out of 5
Good service
KRIS ANNE CORPUZ · Review on Google
Rated 5 out of 5
Working with Drake, Tim and his crew to build my master bedroom, bath and walk in closet was a delight. We got in wonderfully and I would work with them again . Wonderful job guys ☀️
Vanessa Espinoza · Review on Google
Rated 5 out of 5
I never imagined my home could look this polished. Every detail was executed with care and intention. The team kept the project running smoothly without delays. They turned my ideas into something even better than I hoped for. This upgrade changed how I feel in my home every day.
Camila Chaya · Review on Google
Rated 5 out of 5
I couldn’t be happier with the work Green design and build did on my kitchen. From start to finish, they were professional, detail-oriented, and committed to quality. The team was always on time, respectful of my home, and kept everything clean throughout the project. The final result exceeded my expectations — it’s like walking into a brand-new home. Highly recommended!
Shlomo Leon · Review on Google
Rated 5 out of 5
Drake did a great job with my kitchen, it was what I was aiming for since day one
Mooni Levy · Review on Google
Frequently Asked Questions
How many projects has Green Design and Build completed?
More than 500 completed projects. The company is licensed with the California Contractors State License Board under licence number 1110975 and works across Los Angeles, Ventura, Orange and Riverside counties.
How much does an ADU cost in Los Angeles?
For a permitted, finished ADU, realistic budgeting ranges in Los Angeles are: a garage conversion, $100,000 to $200,000; a detached 500 square foot ADU, $180,000 to $260,000; a detached 700 to 800 square foot ADU, $225,000 to $350,000; and a detached 1,000 square foot ADU, $300,000 to $450,000 and up. As a rule of thumb, budget $300 to $450 per square foot all-in for a normal detached ADU. Difficult lots and higher-end construction can run past $500 per square foot. These are budgeting figures rather than a quote — the number for your lot depends on the site, the utilities and the finishes you choose.
What should I budget for a 750 square foot two-bedroom ADU?
Somewhere around $250,000 to $325,000, before assuming anything cheaper. That follows from the $300 to $450 per square foot all-in range that fits most normal detached ADUs in Los Angeles.
How long does an ADU take, from the first call to final inspection?
Usually six months to a year. The build itself is fairly predictable. What varies most is the city — how long the permit and plan check take differs a lot between jurisdictions, and that is the part nobody can promise up front.
Do I need a permit to convert my garage into an ADU?
Yes. A garage conversion needs a permit like any other ADU, which means plans, plan check and inspections.
Do you handle design and permits, or only construction?
All of it. Design, permits and construction under one license, so you are not managing an architect, an expediter and a builder separately.
How much is due up front, and how is the rest paid?
By California law the down payment on a home improvement contract cannot be more than $1,000 or 10 percent of the contract price, whichever is less. The Contractors State License Board confirms this covers the construction of an accessory dwelling unit. After the down payment, payments follow the work: a contractor cannot be paid more than the value of the work actually completed at that point. Anyone asking a homeowner for a larger deposit than that is not permitted to.
Which cities and counties do you serve?
Eight regions: the San Fernando Valley, the Santa Clarita Valley, the Verdugos and San Gabriel Valley, Central and Westside Los Angeles, the South Bay and Harbor, the Conejo Valley and Ventura County, Orange County, and western Riverside County. The full city list is on our Areas We Serve page.
Do you warranty your work?
Yes. We warranty our labor for one year from the date the work is completed. Materials, fixtures and appliances carry their own manufacturer warranties, which are separate from ours and vary by product.