A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Beverly Hills, CA
ADU construction in Beverly Hills, CA costs more per square foot than almost anywhere else in Los Angeles County, and the reasons are specific: older hillside lots, strict zoning review, seismic requirements, and architectural standards that go well beyond what most cities ask for. We are Fielding ADU Builders, an independently owned Garrison Partners company. We price ADUs, garage conversions, and room additions in writing before any work starts, then stand behind the finished job for a full year under The Garrison Standard. Call (361) 315-4177 to talk through your lot and your budget.
Why Beverly Hills Homes Are Different
Beverly Hills is not a typical flat suburban grid. The 90210 ZIP stretches into the canyons and up into hillside lots where retaining walls, slope analysis, and foundation engineering drive cost before framing even begins. Many homes south of Sunset Boulevard sit on generous flat parcels, which makes for straightforward ADU placement. North of Sunset, lots in the Trousdale Estates and Beverly Crest areas often climb at grades that require stepped foundations, taller retaining walls, and careful drainage design. A detached ADU on a sloping Beverly Hills lot can require $15,000 to $40,000 of site work before the structure itself is ordered.
Housing age matters too. Beverly Hills has a large stock of 1920s and 1930s Spanish Revival and Tudor homes, many of which carry historic designation or sit in neighborhoods with strict design review. Converting a garage in one of these homes means working around old slab pours, undersized electrical panels, and sometimes unpermitted prior work that has to be corrected. The city’s building department reviews every ADU application against a detailed design standard, and setback variance requests (the city’s written permission to build closer to the property line than the standard rule allows) move at their own pace. We prepare plans with that review in mind from day one.
Our Main Beverly Hills Services
Most Beverly Hills homeowners come to us for one of three jobs: adding square footage to the existing house, converting a garage, or building a detached ADU in the yard. Each has its own permitting path, its own price range, and its own page on this site.
Room Addition Contractor in Beverly Hills
A room addition in Beverly Hills usually means expanding outward on a flat lot or upward where the existing footprint is tight. We have built ground-level family room additions off the back of 90210 homes, complete with foundation matching, roofline blending, and stucco or James Hardie siding matched to the original exterior. Hillside additions sometimes require cantilevered floor framing or pier drilling, which adds cost but preserves usable yard space below. Most Beverly Hills room additions run six to nine months from first plan to final inspection. Room Addition Contractor in Beverly Hills
Garage Conversion Contractor in Beverly Hills
Garage conversions are the fastest path to an ADU in Beverly Hills because the structure already exists. The work is interior-heavy: raising the slab to living height, insulating the walls, running new electrical, and replacing the roll-up door with a wall system that meets the city’s design review. Flat-lot garages off the alley are simpler; attached garages on older hillside homes sometimes need footing reinforcement. We carry the drawings through Beverly Hills plan check and the permit board stays on the wall. Garage Conversion Contractor in Beverly Hills
ADU Builders in Beverly Hills
A detached ADU in Beverly Hills is either prefab or stick-built, and the right answer depends on your lot access and your budget. We are fluent with leading prefab platforms including Cover and Dvele, and we also build conventional ADUs with Hardie siding where design review calls for a specific exterior. On narrow hillside lots where a crane cannot reach, a modular panel system sometimes beats a factory-built box. Every ADU we build in Beverly Hills gets the same written price upfront and the same 365-day written guarantee. ADU Builders in Beverly Hills
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Beverly Hills
We install and finish ADU structures from Cover, Dvele, and Mighty Buildings, and we frame conventional builds with James Hardie siding. Our brands page lays out what each platform offers, but the short version is that Beverly Hills lots with tight access favor panelized systems while flat lots with wide driveways open up more factory-built options.
Pricing for ADU Company in Beverly Hills, CA
| Service | Typical range in Beverly Hills |
|---|---|
| Garage conversion (attached, flat lot) | $110,000 – $160,000 |
| Garage conversion (detached, alley access) | $120,000 – $175,000 |
| Detached ADU, prefab 400 – 600 sq ft (Cover, Dvele) | $210,000 – $310,000 |
| Detached ADU, conventional build 400 – 600 sq ft | $195,000 – $290,000 |
| ADU over garage, new build | $265,000 – $380,000 |
| Junior ADU (interior conversion) | $85,000 – $125,000 |
| Room addition, ground-level 300 – 500 sq ft | $155,000 – $240,000 |
| Room addition, second-story 300 – 500 sq ft | $210,000 – $320,000 |
| Site prep on hillside lot (grading, retaining, drainage) | $15,000 – $40,000 |
| Permit fees and plan check (city, separate from build) | $8,000 – $20,000 |
What pushes a Beverly Hills job toward the top of those ranges: slope, access, historical review, and any correction of prior unpermitted work. We hand you a written price before any work starts, and that number does not move unless you change the scope. The Garrison Standard applies on every job: show up in the window, price in writing, build by the book, leave it clean, stand behind it for a year.
Neighborhoods We Serve in Beverly Hills
We work across every part of Beverly Hills, from the flat streets south of Wilshire to the canyon roads at the north edge of the 90210 boundary. Crews are local to the Westside, and we schedule estimates across the full service area within a few business days.
- Trousdale Estates
- Beverly Crest
- The Flats (south of Sunset)
- Beverlywood-adjacent 90210
- The Golden Triangle
Service Area – Cities Near Beverly Hills
Our Beverly Hills crews also cover the surrounding Westside and Valley communities. If you live just over the city line, we serve West Hollywood, CA, Studio City, CA, Culver City, CA, and Sherman Oaks, CA. Scheduling is coordinated from our Los Angeles office, but the crew on your Beverly Hills job lives and works in the local area.
Serving Beverly Hills, CA - Our Local Coverage Area
We’re based in the Beverly Hills area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Company in Beverly Hills
Plan review in Beverly Hills typically takes four to eight months depending on design review triggers and whether a setback variance is required. We start drawings immediately after the estimate, and we do not begin construction until the permit card is posted. Call (361) 315-4177 to get the process moving on your lot.
Yes. Beverly Hills applies a design review standard to ADUs and garage conversions that goes beyond basic building code. Exterior materials, rooflines, and street-facing elevations all get scrutinized. We have worked through this process enough to submit plans that clear review on the first or second pass in most cases.
Prefab and panelized ADUs are allowed in Beverly Hills, but the unit must still pass the same plan check and design review as a stick-built structure. Factory-built units from Cover, Dvele, and Mighty Buildings have been permitted in the city. We handle the site work, foundation, utility connections, and final finishes for every prefab install. For an exact quote on your property, call (361) 315-4177.
For a free written estimate on any ADU, garage conversion, or room addition in Beverly Hills, call (361) 315-4177. A live person answers, and the price goes in writing before any work starts.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Beverly Hills Customers Say
"Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B."Honest feedback on what the lot could fit. Told me up front what would fit on the lot and what the setbacks would allow."
- Rita C."Clear price breakdown. Change orders were all in writing."
- Hal P.
