A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Room Addition Contractor Across Beverly Hills
A room addition in Beverly Hills typically runs $180,000 to $450,000 before permit fees, with in-law suites and ADU conversions landing between $140,000 and $320,000 depending on square footage, foundation work, and finish level. The city runs its own plan-check process through Beverly Hills City Hall on Crescent Drive, so the timeline and cost are different here than in surrounding LA County cities. We know that process cold because our crews build in the Flats, up Coldwater Canyon, and through the 90210 and 90211 zip codes every month. Call (361) 315-4177 and we’ll walk you through what your lot actually allows before you spend a dollar on drawings.
Why Fielding ADU Builders Is Beverly Hills’s Preferred Room Addition Contractor Company
Fielding ADU Builders is an independently owned member of the Garrison Partners family, and Reed Calloway runs our Beverly Hills work with the kind of directness that this city’s homeowners have learned to demand. We put the price in writing before any work starts. Not a range, not a ballpark. A written price with a written one-year guarantee behind it, called The Garrison Standard. If something we built fails inside 365 days, we come back and fix it at no charge. That is the entire promise.
Beverly Hills homeowners don’t need another contractor who smiles through the estimate and then goes quiet when plan check sends back comments. Our crews show up in uniform, background-checked before they ever step onto your property, and a live person answers our phone 24 hours a day. No voicemail. No callback queue. When you call at noon or midnight, a person picks up. Reed’s name is on the work, and he stands behind it.
We also know the real Beverly Hills, not the postcard version. A 1920s Spanish Revival off Roxbury Drive has different framing than a 1960s ranch off Benedict Canyon. A hillside lot north of Sunset has different setback and floor-area-ratio rules than a flat lot in the Flats. That local knowledge, combined with our Room Addition Contractor team’s experience across ADU and addition work, is why homeowners here call us back for their second project.
In Law Suite Builders in Beverly Hills
In Law Suite Builders in Beverly Hills means converting or adding a self-contained living area, usually with its own entrance, bathroom, kitchenette, and separate electrical subpanel, for aging parents, adult children, or a full-time caregiver. Most Beverly Hills homeowners we talk to are not building a rental. They are keeping family close without giving up privacy. A new attached in-law suite here typically costs between $160,000 and $280,000 before permit fees, depending on site work and finish level.
Plan Check and the In-Law Suite
Beverly Hills City Hall reviews each in-law suite through its own plan check on Crescent Drive, not the county. They look at parking, unit separation, and fire access. We handle the submittal, corrections, and inspection scheduling so the calendar does not stall on paperwork.
What Most Homes Need First
Many pre-war Beverly Hills houses still run on 100-amp electrical panels. Adding an in-law suite usually forces a panel upgrade and sometimes a dedicated water heater. We write those costs into the first number, not a change order later.
ADU Conversion in Beverly Hills
ADU Conversion in Beverly Hills generally means turning an existing garage, bonus room, or underused wing into a legal accessory dwelling unit with its own address, kitchen, bath, and utility connections. A garage conversion here usually starts around $140,000 and runs to $220,000, while a larger bonus-room conversion can push past $260,000. The city’s own ADU ordinance allows certain setbacks and height limits, but every lot is different, and Beverly Hills enforces its own rules through its own inspection sequence.
The Garage Conversion Reality
Most garages in the flats south of Wilshire were never built to house people. They need new foundations or slab reinforcement, insulation, drywall, and often sewer line upgrades. We quote it honestly up front because the first number should be the real number.
Prefab and Modular Options
We work with Abodu, Cover, and Dvele on Beverly Hills ADU projects where the lot access and zoning support a prefab or panelized build. That can shorten construction time and keep the price from drifting, because the modules are built off-site to spec.
Trusted Brands We Service in Beverly Hills
We build conventional additions and we also work with the prefab and modular platforms Beverly Hills homeowners are already researching. Our team has direct experience with Abodu, Cover, Dvele, and Mighty Buildings units, plus conventional builds using James Hardie siding. We keep relationships with local Beverly Hills suppliers for trim, stucco, and roofing materials, so lead times on fixtures and finishes stay short. If you already have a line on a Dvele or Abodu unit, we can handle the site work, foundation, utilities, and city sign-off around it.
Common Room Addition Contractor Problems We See in Beverly Hills Homes
- Bidding off a napkin sketch before plan check has spoken. A contractor gives you a number before Beverly Hills City Hall reviews setbacks, height limits, and floor-area-ratio against your specific lot. The number moves once the city’s comments land, and now you’re paying more with a hole already dug.
- Assuming the existing electrical service can absorb the addition. Pre-war homes in the Flats and along Rexford Drive often still run 100-amp panels. A 400-square-foot primary suite with a bathroom heater, closet lighting, and a minibar pulls more than the old panel can give, so a service upgrade is mandatory, not optional.
- Treating Beverly Hills permits as a formality. This city runs its own inspection sequence separate from LA County. Missing an inspection or scheduling them out of order stalls the entire job and pushes back the final sign-off, which pushes back move-in.
- Hillside lots north of Sunset with foundation surprises. The canyon-side homes need more structural engineering than a flat-lot house. Soil reports, retaining walls, and deeper footings drive cost in ways a flat-lot bid never anticipates.
Pricing for Room Addition Contractor in Beverly Hills, CA
Here are real numbers for Beverly Hills work, not national averages. A straightforward 400-500 square foot single-story addition runs $180,000 to $320,000. A garage conversion to an in-law suite runs $140,000 to $220,000. A second-story primary suite addition runs $300,000 to $450,000, depending on structural work and the city’s height and setback review. Permit fees, plan check, and school district fees add another $8,000 to $25,000 depending on project size. Every estimate from us is free and written. The number you approve is the number on the final invoice. Call (361) 315-4177 for a line-item quote specific to your lot.
We Also Serve Cities Near Beverly Hills
Our Beverly Hills crews work throughout the west side. We take on room addition projects in West Hollywood, Studio City, Culver City, and Sherman Oaks, and we know the permitting differences between each city and Beverly Hills. The same written-price promise and one-year guarantee apply wherever we work.
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 Room Addition Contractor in Beverly Hills
Yes. Beverly Hills runs its own municipal building code and plan-check process through Beverly Hills City Hall on Crescent Drive, not the LA County system. Your addition goes through Beverly Hills plan check, Beverly Hills inspections, and a final sign-off from the city. We handle all submittals and corrections.
Figure eight to fourteen months total. Design and engineering take four to eight weeks. Beverly Hills plan check typically runs six to ten weeks depending on the current queue and how quickly comments get resolved. Construction on a single-story addition runs four to six months, and a second-story or hillside addition runs six to nine months. We give you a written calendar at the start, not after you sign.
Foundation and structural work. A room addition on a flat lot with a good slab costs less than a hillside addition needing deeper footings. An ADU conversion inside an existing garage saves on shell construction but often spends more on insulation, drywall, electrical, and plumbing retrofits. The finish level matters more than most people expect. Call (361) 315-4177 and we’ll break it down line by line for your specific property.
In most cases, yes. Beverly Hills zoning allows certain garage and bonus-room conversions to legal in-law suites or ADUs, but each lot’s setbacks, parking requirements, and floor-area-ratio limits get reviewed by the city’s own plan check. We evaluate the existing structure, tell you what has to change, and write the permit submittal so it passes cleanly.
The three usual things: city plan-check comments that force design changes, hidden conditions inside pre-war walls or under old slabs, and upgrades the homeowner requests mid-build. Our written price includes a full site review and a plan-check strategy so the first number is the real number. If the city requires a change, we show you the written change order before anything gets done. Call (361) 315-4177 to schedule a free estimate and we will walk your lot with you.
Written by Reed Calloway, Owner at Fielding ADU Builders, serving Beverly Hills.
