- Typical cost
- $120k to $400kBeverly Hills, 2026
- Building department
- City of Beverly Hills
- Permit needed
- Usually yes
- Licensed
- CSLB 1083262Class B general building
State ADU law applies in Beverly Hills exactly as it does everywhere else and the city cannot opt out of it. What it does apply is its own design standards and fee schedule. The jurisdiction trap here catches people constantly: a Beverly Hills Post Office address is in the City of Los Angeles, goes through LADBS, and follows LA's rules instead. We confirm by parcel before anything is drawn.
What it costs in Beverly Hills
| What | Typical Los Angeles range | Notes |
|---|---|---|
| Junior ADU, inside the house | $60,000 to $120,000 | Up to 500 sq ft, may share a bathroom |
| Garage conversion | $120,000 to $150,000 | 350 to 400 sq ft, reuses the structure |
| Detached ADU, 400 to 500 sq ft | $150,000 to $200,000 | Studio or small one-bedroom |
| Detached ADU, 600 to 800 sq ft | $200,000 to $250,000 | Standard finishes |
| Detached ADU, 1,000 to 1,200 sq ft | $300,000 to $350,000 | Or $350k to $400k two-story |
| Utility work that catches people out | $10,000 to $60,000 | Sewer upsizing, panel upgrade, separate meter |
Los Angeles County figures, reviewed 2026-10-29 by America General Contractors, California contractor licence CSLB 1083262. Planning ranges, not a quote, and not legal advice. We confirm the current rules for your parcel before anything is drawn.
How we approach it here
An ADU is a second, legal home on your lot. It can be a detached unit in the backyard, an addition with its own front door, a converted garage, or a small unit carved out of the house. State law has made them legal on nearly every residential lot in California, and Los Angeles builds more of them than anywhere else in the state.
We build them for homeowners who want rent or room for family, and for investors adding units to houses and apartment buildings. We handle the lot check, the drawings, the utilities, the permit and the build through to the day the city signs off and the unit gets its own address.
Building rules in Beverly Hills
Beverly Hills runs its own building division with design review for hillside areas, strict construction hour limits, and a separate approval process for projects on the Beverly Hills side of the city boundary versus the LA side (BHPO is LA City). Hillside lots in Trousdale and the canyons carry grading and geotechnical requirements that shape both design and budget.
Building department
City of Beverly Hills Community Development, Building & Safety Division
ZIP codes we cover
90210, 90211, 90212
Neighborhoods
The Flats, Trousdale Estates, Beverly Hills Post Office (BHPO), South of Wilshire, Benedict Canyon
What a adu builder job includes
- A lot check: setbacks, height, utilities and what the city will allow
- Drawings, energy-code paperwork and structural engineering
- Permit filing and the back-and-forth with the city
- Sewer, water, gas and electrical hookups, with a separate meter if you want one
- Foundation, framing, roofing, insulation and the full interior
- Kitchen, bathroom, laundry and heating and air
- Fire separation and escape windows where the code requires them
- Final inspection, certificate of occupancy and a new address
What moves the price
- Converting something that exists versus building new from the ground
- How far the unit sits from the sewer, and whether the main line can handle another unit
- Whether your electrical panel has room, and whether you want a separate meter
- Getting equipment into the backyard: access, slope, trees, and anything that has to come down first
- Finish level, and whether you are renting it out or putting family in it
Permits and inspections
ADUs are allowed by right on most residential lots under state law, and the city has to approve or deny a complete application within 60 days. Real-world timelines run 2 to 4 months once you count the corrections the city sends back. New detached units get 4-foot side and rear setbacks and at least 16 feet of height. A converted garage keeps the setbacks it already has. The City of Los Angeles also has pre-approved standard plans that skip most of the design review.
How we run the job
1. Walk the property
We meet you on site, listen, and look at what the building and the city will need. You get a written scope and a budget range.
2. Drawings
When drawings are needed we bring in the architect and engineer, and price the design while it is being drawn.
3. Permit
We file with the city, handle the corrections they send back, and tell you where it stands.
4. Price and contract
An itemized price, a schedule and payment terms. Anything new after signing gets priced in writing first.
5. Build
One supervisor on your job, licensed trades, inspections in order, and a weekly update with photos.
6. Walkthrough
A final fix list, the city's sign-off, and a written warranty on our work.
Beverly Hills questions about ADU and garage conversion work
Do I need a permit for ADU and garage conversion work in Beverly Hills?
City of Beverly Hills Community Development, Building & Safety Division Real-world timelines run 2 to 4 months once you count the corrections the city sends back. New detached units get 4-foot side and rear setbacks and at least 16 feet of height. A converted garage keeps the setbacks it already has. The City of Los Angeles also has pre-approved standard plans that skip most of the design review.
How much does ADU and garage conversion work cost in Beverly Hills?
$120k to $400k is the usual range across Los Angeles County, and Beverly Hills sits inside it. The table on this page breaks it down by scope. What moves the number locally is the condition of the existing house and whether the layout changes, not the ZIP code. We price from a walkthrough, not a square-foot rule.
How long does ADU and garage conversion work take in Beverly Hills?
Drawings and engineering take 4 to 8 weeks. Permits take 2 to 4 months. Construction is 3 to 5 months for a garage conversion and 5 to 8 months for a detached unit. New utility meters run on the utility company's schedule, not ours, so we start those applications early.
Can I build an ADU on my lot?
Almost certainly. State law requires cities to allow at least one ADU and one junior ADU on single-family lots, and multiple units on apartment lots. Hillside, fire-zone and historic properties get extra conditions but are rarely flat-out prohibited. We confirm it with a parcel check.
Do I have to replace the parking I lose?
No. State law bars cities from making you replace parking when you convert a garage into an ADU.
Other work we do in Beverly Hills
kitchen and bathroom remodeling, room additions, whole-house renovation, seismic retrofit and foundation work. Or see everything on the Beverly Hills page.
ADU Builder in nearby cities
Pasadena, Culver City, Long Beach, Santa Monica, Burbank, Sherman Oaks.