Best ADU Builders in Los Angeles, CA
The average cost to build an ADU in Los Angeles is $280–$420 per square foot. Top-rated builders include Eco Grizzly, Green Works Construction, AP Remodeling.
Every builder below is CSLB license-verified, bonded, and insured — vetted before they ever reach a homeowner. Browse ratings and real reviews, compare starting prices, or let us match you with the best fit for your lot and budget. It's free; we're paid by the builders, not you.
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23 builders in Los Angeles, CA
Last updated June 26, 2026
License VerifiedEco Grizzly
Serving Los Angeles, CA · Canoga Park, CA
“We had a great experience with the chimney repair team. They were professional, and explained everything clearly before starting the work. The repair was done e…”— Cecilia Adler
Pricing on request
Licensed Southern California design-build contractor for detached ADUs, garage conversions, and JADUs.
License VerifiedGreen Works Construction
Serving Los Angeles, CA · Woodland Hills, CA
“Omri at Green Works was great to deal with on our renovation service. He always returned calls and kept me informed in every step of the process. The crew was e…”— Julianne Riddle
Pricing on request
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License VerifiedAP Remodeling
Serving Los Angeles, CA · Culver City, CA
“Working with Aviv on our complete home remodel was an exceptional experience from start to finish. His professionalism, attention to detail, and commitment to q…”— Asia Adducci
Pricing on request
LA design-build remodeler offering ADUs, garage conversions, and full-home renovation.
License VerifiedGoldenline Construction
Serving Los Angeles, CA · Woodland Hills, CA
“Goldenline handled our 720 sq ft detached ADU from permits through final inspection. Clear schedule, no surprise change orders, and the city sign-off was painle…”— Marisol T., Homeowner
Pricing on request
A Woodland Hills general contractor with a CSLB B license active since 2013.
License VerifiedNEO Builders ADU
Serving Los Angeles, CA · Studio City, CA
“The best, builders and people. As a disabled only parent to a special needs child, we are especially vulnerable to unscrupulous actors. I am beyond grateful to…”— S Cohen
Pricing on request
Locally owned LA ADU design-build team — detached units and garage conversions, fast.
License VerifiedOlympia Construction by Design
Serving Los Angeles, CA · Encino, CA
“We recently completed a full home remodel in Sherman Oaks with Olympia Construction, and the experience was excellent from start to finish. We received five dif…”— Sapir Adani
Pricing on request
Licensed Los Angeles general contractor building custom ADUs across the San Fernando Valley
License VerifiedQuality First Builders
Serving Los Angeles, CA · Sherman Oaks, CA
“Before we started I honestly thought a garage ADU would feel like exactly that... a garage that someone tried to dress up. That was my biggest concern because t…”— Vicente Enriquez
Pricing on request
Design-build ADUs, additions and remodels across Los Angeles and the San Fernando Valley.
License VerifiedGround Up Builders
Serving Los Angeles, CA · Van Nuys, CA
“We cannot recommend Ground Up Builders enough! They converted our two-car garage into an ADU and did a truly amazing job. They finished ahead of schedule, commu…”— Lauren Worsham
Pricing on request
Family-owned LA design-build contractor for ADUs, garage conversions, and whole-home remodels
License VerifiedDwell Homes Los Angeles
Serving Los Angeles, CA · Valley Village, CA
“Dwell designed an attached unit for my aging parents. Thoughtful layout, accessible bathroom, and they handled the JADU paperwork. Genuinely caring team.”— Sofia L., Homeowner
Pricing on request
A Valley Village general building contractor carrying full bonding and $1M liability coverage.
License VerifiedLA CCS
Serving Los Angeles, CA · Encino, CA
“LA CCS turned our detached garage into a full 1-bed ADU. They flagged a setback issue early and adjusted the plan so we didn't lose time at plan check. Very pro…”— Brandon H., Homeowner
Pricing on request
An Encino-based licensed general building contractor for ADUs, additions, and remodels.
License VerifiedActon ADU
Serving Los Angeles, CA · Campbell, CA
“Acton works across California and it shows — their process is dialed in. Standardized floor plan kept costs predictable and the build quality was excellent.”— Rachel P., Homeowner
Pricing on request
A California general building contractor licensed since 1992, serving the LA market statewide.
License VerifiedProgressive Builders
Serving Los Angeles, CA · Canoga Park, CA
“Instead of replacing one thing at a time, we decided to do the bathroom remodel properly in one project. That choice saved us from having to redo the work later…”— Isaac Bailey
Pricing on request
Your Vision, Our Craft — transforming LA homes inside and out.
License VerifiedSouth Land Remodeling
Serving Los Angeles, CA · Sherman Oaks, CA
“Our experience with Southland remodeling has been wonderful. My family came to Ilan with a vision and he and the company turned it into a reality! They are a 5…”— stacy sanker
Pricing on request
5-star, award-winning ADU builder and architect serving Los Angeles and the San Fernando Valley
License VerifiedGo ADU Construction
Serving Los Angeles, CA · Burbank, CA
“We had a beautiful experience working with Gil’s team of Hugo and Daniel and they were very diligent throughout the entire process. They built our ADU from star…”— Teckla Clay
Pricing on request
Build an ADU without the stress, with a contractor you can trust.
License VerifiedGolden ADU
Serving Los Angeles, CA · Los Angeles, CA
“We begun the first phase of our ADU project and so far the experience has been very positive. The team has been professional and organize throughout the demolit…”— Marcia Berry
Pricing on request
Trusted design-build ADU specialists for Los Angeles and surrounding communities.
License VerifiedBaldwin Builders
Serving Los Angeles, CA · Covina, CA
“I have had the pleasure of knowing Tony Ferro, owner of Baldwin Builders, both personally and professionally and I cannot recommend him and his team highly enou…”— carolyn cooney
Pricing on request
California's firefighter-owned ADU and home-addition builder serving LA, Orange & Riverside counties.
License VerifiedThe ADU Pro
Serving Los Angeles, CA · Chino, CA
“Dj,Bryan, and Bruno were awesome dad past away a couple years ago and my wife and I decided to build the adu for mom. They took the worries out of it. They alwa…”— neil lisenby
Pricing on request
Southern California's design-build ADU specialist — detached, attached, garage conversions and JADUs.
License VerifiedVilla Homes
Serving Los Angeles, CA · San Francisco, CA
“Excellent job! The Villa crew from start to finish nothing short of professional. Foundation, home delivery, finish work etc top notch. I would recommend Vill…”— M Ferreira
Pricing on request
Tech-enabled prefab ADU builder delivering turnkey backyard homes across California.
License VerifiedOtto ADU
Serving Los Angeles, CA · Los Angeles, CA
“We hired Otto ADU to design and supervise the building of our new ADU. They did a great job. The new ADU (which replaced our garage) is beautiful and, despite…”— ARP in LA
Pricing on request
Los Angeles ADU builders who make life easier — more space, more income, less stress.
License VerifiedPacific Point Builders
Serving Los Angeles, CA · Encino, CA
“Steven and his team are a literal pond in the desert.I had spoken to COUNTLESS contractors about a garage conversion, the price differentials, general lack of k…”— seehbeeee
Pricing on request
Family-owned LA contractor building ADUs and garage conversions through all four stages
License VerifiedNestadu
Serving Los Angeles, CA · Mill Valley, CA
“Nestadu did a great job on my backyard ADU. Their team was professional, and the final result looks fantastic—well-built and blends in nicely with my home. Pric…”— Stephen Reid
Pricing on request
Custom and prefab ADUs for California homeowners — design, permit, and build, turnkey.
License VerifiedADU Builder and Construction Inc.
Serving Los Angeles, CA · Encino, CA
“Now that my ADU is complete, I can confidently say it has exceeded my expectations. The quality of craftsmanship is impressive, and I’m excited about the potent…”— TOM MERLIN
Pricing on request
Family-owned ADU and garage-conversion builder serving Encino, Woodland Hills & the San Fernando Valley.
License VerifiedGather ADU
Serving Los Angeles, CA · Northridge, CA
New to the directory
Pricing on request
LA's full-service ADU experts — design, permits, and construction under one roof.
Frequently Asked Questions
- How much does it cost to build an ADU in Los Angeles, CA?
- In Los Angeles, ADUs typically run $280–$420 per square foot all-in. A detached 800 sq ft unit commonly lands between $230k and $340k depending on finishes, site conditions, and utility connections. Garage conversions are the most affordable path, often under $180k.
- How long does it take to build an ADU in Los Angeles?
- Plan to budget 6–12 months end to end. California law caps ADU plan check at 60 days for compliant designs, and construction usually takes 4–8 months after permits are issued.
- Do I need a permit to build an ADU in Los Angeles?
- Yes. All ADUs require a building permit, but California mandates ministerial (non-discretionary) approval for compliant units, so there's no public hearing or design review. Your builder typically pulls the permit on your behalf.
- How do I choose a builder in Los Angeles?
- Confirm the contractor holds an active CSLB license, is bonded and insured, and has built ADUs in Los Angeles specifically. Every builder in this directory is license-verified. Use "Get a Quote" to be matched with the best fit for your lot and budget.
ADU costs in Los Angeles: city vs. metro vs. state
Building an ADU in Los Angeles runs roughly $280–$420 per square foot all-in. Here's how the city benchmarks against the broader metro and statewide averages.
| Area | Avg. cost / sq ft | Typical 800 sq ft ADU |
|---|---|---|
| Los Angeles | $280–$420 | $224,000–$336,000 |
| Los Angeles metro | ~$350 | ~$280,000 |
| California (CA) | ~$330 | ~$264,000 |
Cost by ADU type in Los Angeles
| ADU type | Typical size | Project cost | Timeline |
|---|---|---|---|
| Detached ADU | 600–1,200 sq ft | $180,000–$420,000 | 8–12 months |
| Attached ADU | 400–800 sq ft | $140,000–$300,000 | 6–10 months |
| Garage Conversion | 400–600 sq ft | $90,000–$180,000 | 4–7 months |
| JADU (Junior ADU) | ≤ 500 sq ft | $60,000–$140,000 | 3–6 months |
ADU rules & permits in Los Angeles, CA
Los Angeles processes compliant ADU permits ministerially with a 60-day plan-check ceiling set by state law (AB 68). The city's Standard Plan Program offers pre-approved detached-ADU designs that skip most plan check.
| Jurisdiction | Permit timeline | Permit fees | Notes |
|---|---|---|---|
| City of Los Angeles | 60-day plan check (by law) | $3k–$8k | Pre-approved Standard Plan program available |
| Unincorporated LA County | 60–90 days | $4k–$10k | Ministerial approval for compliant ADUs |
| Statewide (CA) | 60 days max by statute | Varies | Owner-occupancy requirement waived through 2030 |
Financing your ADU in Los Angeles
Most LA homeowners fund an ADU with a renovation or construction loan, a HELOC, or a cash-out refinance. RenoFi and ADU-specific construction loans underwrite against the home's after-build value, which often unlocks more than a standard HELOC.
Construction / renovation loan
Funds released in draws as the build hits milestones; underwritten against after-build value.
HELOC / home equity
Borrow against existing equity. Fast to set up if you have 20%+ equity.
Cash-out refinance
Replace your mortgage and pull equity as cash — best when rates are favorable.
ADU-specific lenders
RenoFi and similar lenders underwrite the projected value the ADU adds, often unlocking more.
Pre-ADU Checkup — $499 — Get finalized permits, a pre-ADU checklist, and an on-site feasibility visit. Homeowners save $1,000s by doing this before engaging a contractor.