ADU in Beverly Hills, CA
Junior ADU & Interior Conversion in Beverly Hills typically costs $85,000-$180,000 all-in, while ADU Site Prep & Utilities runs $15,000-$75,000 depending on hillside conditions and utility distance. Most Beverly Hills ADU work involves legalizing existing structures rather than ground-up builds. Call (424) 523-8492 for a written estimate before any work starts.
We’re Ellery ADU Studio, a design-build practice that coordinates drawings, permitting, and construction under one contract at one written price. Our Los Angeles office dispatches crews to Beverly Hills daily. Junior ADU & Interior Conversion is what we handle most here, given the city’s stock of unpermitted guest cottages and staff quarters built between the 1920s and 1960s.
Why Beverly Hills Homes Are Different
Beverly Hills is an independent municipality, not part of Los Angeles, with its own planning department and ADU ordinance. Homeowners cannot use LA City’s streamlined permitting program and must navigate Beverly Hills’s review process entirely.
The flats south of Santa Monica Boulevard hold 1920s-1940s Spanish Colonial and Tudor Revival homes on 7,000-10,000 sq ft lots, most with detached garages accessed from rear alleys. The hillside estates north of Sunset, built 1930s-1960s, contain legacy pool houses and carriage structures constructed to lower habitability standards. These existing structures dominate our workload; legalizing and upgrading them is a conversion challenge unique to this city’s estate character.
Hillside parcels face marine layer intrusion and higher humidity than the flats, making vapor management critical in below-grade or hillside-embedded conversions. Winter rain on steep grades demands engineered drainage solutions flat-lot projects rarely need. Flats properties with alley access allow garage-conversion ADUs with their own rear entry, leaving the historic street facade undisturbed, a design-review advantage Beverly Hills planners specifically value.
Our Main Beverly Hills Services
These are the three services Beverly Hills homeowners call about most, in addition to the two detailed below.
ADU Design & Permitting in Beverly Hills
We produce the full permit set, structural calculations, and Title 24 energy compliance as a core deliverable, not an afterthought. Beverly Hills’s independent planning department requires site-specific documentation that LA City’s streamlined program does not; our drawings account for this from the first sheet. ADU Design & Permitting in Beverly Hills covers every phase from feasibility study through certificate of occupancy.
Garage Conversion ADU in Beverly Hills
Flats-area garages with alley access convert cleanly to independent units without altering the primary home’s street presence. We assess slab thickness, ceiling height, and firewall separation, then produce a permit set that preserves the historic envelope while meeting current code. Garage Conversion ADU in Beverly Hills is typically our fastest path to a legal ADU here.
New Detached ADU in Beverly Hills
Where no existing structure exists or where hillside conditions favor a new build, we coordinate prefab systems from Abodu, Cover, or Dvele within our single-contract model. Setback variances, the extra distance Beverly Hills requires between structure and property line, are resolved in the permit set before construction begins. New Detached ADU in Beverly Hills includes full MEP design and utility tie-ins.
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.
Before
AfterJunior ADU & Interior Conversion in Beverly Hills
Junior ADU & Interior Conversion in Beverly Hills solves the city’s most common ADU problem: existing habitable space that was never permitted as such. The hillside estates north of Sunset hold dozens of pool houses and above-garage quarters built to 1930s-1960s standards, while the flats contain basement and attic spaces ripe for legal independent units. Marine layer humidity and older framing make vapor management and structural assessment critical first steps. Junior ADU & Interior Conversion covers every interior path to a legal ADU under one contract.
Room-to-ADU Conversion
Signs you need it
You have a main-floor bedroom wing, den, or former staff quarters with separate exterior access that could become an independent unit without altering the home’s footprint.
What it costs in Beverly Hills
Room-to-ADU conversion in Beverly Hills typically runs $85,000-$140,000 all-in, including the permit set, MEP rough-in, kitchen and bath build-out, and final inspection.
How we do it
We verify firewall separation and sound transmission ratings, design a compact kitchen and full bath within the existing envelope, and produce a permit set that satisfies Beverly Hills’s independent building division.
Above-Garage ADU
Signs you need it
Your property has a detached garage with a finished upper level, former chauffeur’s quarters, or staff apartment that lacks a certificate of occupancy.
What it costs in Beverly Hills
Above-garage ADU conversion in Beverly Hills typically runs $110,000-$180,000 all-in, including structural reinforcement for the new occupancy load, MEP upgrades, and staircase or exterior access improvements.
How we do it
We assess the existing framing and foundation for live-load compliance, design egress and kitchen ventilation that meets current code, and coordinate the permit set with Beverly Hills’s hillside grading requirements where applicable.
What Junior ADU & Interior Conversion Costs in Beverly Hills
| Item | Typical range in Beverly Hills |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000-$140,000 |
| Above-garage ADU conversion (all-in) | $110,000-$180,000 |
| Basement ADU conversion (all-in) | $95,000-$160,000 |
Can a Junior ADU have its own kitchen in Beverly Hills?
Yes, a Junior ADU in Beverly Hills may include a small efficiency kitchen with cooking appliances, though it must remain within the existing footprint of the primary home. We design these to meet Beverly Hills’s specific fire-separation and ventilation requirements.
Will converting interior space trigger a full home upgrade?
Not necessarily; Beverly Hills applies triggered upgrades only to the portion of the structure being modified, not the entire home, though electrical service and sewer lateral capacity must support the new unit. We assess this in our feasibility study before any work begins.
ADU Site Prep & Utilities in Beverly Hills
ADU Site Prep & Utilities in Beverly Hills addresses the physical and regulatory groundwork that must precede any conversion or new build. Hillside estates require engineered drainage and retaining-wall assessment, while flats properties often need electrical service upgrades and sewer lateral work to support a second dwelling unit. Marine layer conditions and older infrastructure make utility sizing and moisture management critical to long-term performance. ADU Site Prep & Utilities is integrated into every project we take on.
Electrical Panel Upgrade
Signs you need it
Your home has a 100-amp service, fused panel, or visible corrosion, and the ADU will add a second kitchen, laundry, and HVAC load.
What it costs in Beverly Hills
Electrical panel upgrade in Beverly Hills typically runs $4,500-$12,000, including permit, SCE coordination, and new grounding to meet current NEC standards.
How we do it
We size the new load calculation for the primary home plus ADU, coordinate with Southern California Edison for service-line capacity, and pull the permit through Beverly Hills’s building division.
Foundation & Grading
Signs you need it
Your conversion involves a hillside-embedded structure, a garage slab under 4 inches thick, or visible cracking and settlement on an existing accessory building.
What it costs in Beverly Hills
Foundation and grading work in Beverly Hills typically runs $15,000-$45,000, including geotechnical report, engineered drainage, and retaining-wall modifications where hillside conditions apply.
How we do it
We engage a soils engineer for hillside parcels, design drainage that handles concentrated winter runoff, and produce a grading plan that Beverly Hills’s planning department approves before we pour.
What ADU Site Prep & Utilities Costs in Beverly Hills
| Item | Typical range in Beverly Hills |
|---|---|
| Electrical panel upgrade | $4,500-$12,000 |
| Foundation & grading (hillside) | $15,000-$45,000 |
| Sewer lateral replacement or extension | $8,000-$22,000 |
Does Beverly Hills require a separate water meter for an ADU?
Beverly Hills does not mandate separate water meters for most ADUs, though we size the existing service for combined demand and document this in the permit set. Call (424) 523-8492 to confirm for your specific parcel.
How long does utility coordination take in Beverly Hills?
Utility coordination with SCE and Beverly Hills Public Works typically adds 3-6 weeks to the pre-construction schedule, longer if a sewer lateral crosses into the street. We handle this timeline in our project schedule, not yours.
Brands We Service in Beverly Hills
We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, and Mighty Buildings within our single-contract model, with parts and technical support coordinated from our Los Angeles office. Turnaround on brand-specific engineering questions is typically 48 hours. See our brands for full compatibility.
Pricing for ADU in Beverly Hills, CA
| Service | Typical range in Beverly Hills |
|---|---|
| Room-to-ADU conversion | $85,000-$140,000 |
| Above-garage ADU conversion | $110,000-$180,000 |
| Basement ADU conversion | $95,000-$160,000 |
| Electrical panel upgrade | $4,500-$12,000 |
| Foundation & grading (hillside) | $15,000-$45,000 |
| Sewer lateral replacement | $8,000-$22,000 |
| Gas line extension | $3,500-$9,000 |
| Landscaping & hardscape (post-build) | $12,000-$35,000 |
Price in Beverly Hills pushes higher for hillside geotechnical work, longer utility runs on large parcels, and design-review revisions for visible exterior changes. Under Haven Standard Clause 1, every project receives a written price before any work begins; no estimate changes without a signed change order.
Neighborhoods We Serve in Beverly Hills
Our crews work across Beverly Hills’s distinct zones, from the flats to the hillside estates. Response time is typically same-day for site visits scheduled through our Los Angeles office.
- The Flats (south of Santa Monica Blvd)
- Trousdale Estates
- Beverly Hills Post Office
- Beverly Crest
- Golden Triangle
Service Area - Cities Near Beverly Hills
We serve homeowners throughout the Westside and San Fernando Valley, with crews dispatched daily from our Los Angeles office. Nearby cities include West Hollywood, CA, Studio City, CA, Culver City, CA, and Sherman Oaks, CA. Each follows its own municipal ADU ordinance, and our permit sets are jurisdiction-specific.
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 in Beverly Hills
Beverly Hills’s independent planning department typically reviews complete ADU permit sets in 8-14 weeks, longer than LA City’s streamlined program but predictable if the initial submission is thorough. Our permit sets are produced to minimize revision rounds.
California state law limits HOA prohibitions on ADUs, but Beverly Hills HOAs may enforce design guidelines on visible exterior modifications; we review CC&Rs during feasibility to flag any constraints before design begins.
Yes, though historic properties require additional design-review approval from Beverly Hills’s Cultural Heritage Commission; our permit sets include the documentation this review demands, and we coordinate the submission.
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
"The rental income has covered the payment since the second month. They were realistic about the numbers rather than optimistic."
- Odette N."They walked us through setbacks and utility capacity before we paid anything, and told us one of our two options was not going to get approved."
- Mireille T."The permit set and the build were one contract with one number. Our neighbours used two firms and spent a year watching them blame each other."
- Helena V.