ADU in Beverly Hills, CA
Junior ADU and interior conversion in Beverly Hills typically runs $85,000-$195,000 all-in, while full site prep and utility work adds $35,000-$125,000 depending on hillside conditions and existing infrastructure. We’re Ellery ADU Studio, and we’ve found that Beverly Hills homeowners don’t need another generic contractor - they need a design-build studio that understands this city’s independent Building & Safety Division, its 1920s-1950s estate housing stock, and the fire-hazard constraints that govern every hillside project. Call (213) 698-7591 to schedule your free estimate.
Our Los Angeles office coordinates dispatch and scheduling for Beverly Hills crews, but every permit set we submit goes through Beverly Hills’s own plan-check process - entirely separate from LA’s DBS. That distinction matters when your project involves converting a 1930s chauffeur garage or adding a kitchenette to a pool house in Trousdale Estates.
Why Beverly Hills Homes Are Different
Beverly Hills is a fully independent municipality, not part of Los Angeles, with its own Building & Safety Division, ADU ordinance, and plan-check process. Contractors permitted for LA ADU work must re-qualify under Beverly Hills’s distinct fee schedule, setback standards, and design-review requirements. The city’s large estate-era lots contain detached pool houses, chauffeur garages, and original guesthouses from the 1920s-1950s that owners are converting to luxury ADUs, where finish expectations and per-square-foot costs exceed anything in the surrounding region.
The flat district features Spanish Colonial Revival, Tudor, and traditional estates on generous lots, many with existing detached structures and utility stubs that simplify conversion. Trousdale Estates presents a different challenge: post-and-beam Mid-Century Modern homes on steep, graded pads where structural tie-ins and soils reports add complexity. The north hillside falls within California’s Very High Fire Hazard Severity Zone, requiring Chapter 7A ignition-resistant standards - non-combustible siding, ember-resistant vents, and defensible-space setbacks that constrain placement even on spacious lots. Many Trousdale properties sit on artificially graded pads from the 1950s, meaning compacted-fill boundaries run directly under logical ADU placement; Beverly Hills Building & Safety requires geotechnical reports for hillside ADUs that LA’s DBS would not demand.
Our Main Beverly Hills Services
These are the three services Beverly Hills homeowners research most before calling us.
ADU Design & Permitting in Beverly Hills
Every Beverly Hills ADU starts with a permit set that meets this city’s independent Building & Safety standards, not LA’s. We produce architectural drawings, structural calculations, and Title 24 energy compliance as a single deliverable, then shepherd the plan-check process through Beverly Hills’s distinct review timeline. Our ADU Design & Permitting in Beverly Hills page details how we handle estate-era as-built conditions and hillside geotechnical requirements.
Garage Conversion ADU in Beverly Hills
Beverly Hills’s flat district contains hundreds of 1920s-1950s detached garages with existing slabs and roof structures that convert efficiently to ADUs, though many need seismic anchoring and fire-separation upgrades to meet current code. We assess the existing footprint, utility capacity, and setback compliance before quoting a written price. See our Garage Conversion ADU in Beverly Hills page for typical costs and timeline.
New Detached ADU in Beverly Hills
New construction on Beverly Hills estate lots offers design flexibility but triggers the city’s full design-review process, hillside geotechnical requirements in Trousdale, and Chapter 7A fire-resistant materials on north-facing properties. We coordinate soils engineers, surveyors, and the permit set as one contract. Details are on our New Detached ADU in Beverly Hills page.
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.
Junior ADU & Interior Conversion in Beverly Hills
Junior ADU and interior conversion in Beverly Hills solves a specific problem: adding rental income or multigenerational space without building new square footage on constrained or hillside lots where detached construction triggers geotechnical complexity. We handle Junior ADU & Interior Conversion as a single design-build contract, from as-built documentation through final inspection, with a written price before any work starts per Haven Standard Clause 1.
Room-to-ADU Conversion
Signs you need it
An underused wing, former staff quarters, or ground-floor suite with separate exterior access and existing utility rough-ins is the ideal candidate.
What it costs in Beverly Hills
Room-to-ADU conversions in Beverly Hills typically run $85,000-$155,000 including the permit set, fire separation, kitchenette, and bathroom.
How we do it
We document existing conditions, design the partition and egress plan, produce the Beverly Hills permit set, then execute the build with documented photo records on every visit.
Interior JADU
Signs you need it
You need a compact, code-minimum unit inside your existing footprint for family use or limited rental, without altering the exterior envelope.
What it costs in Beverly Hills
Interior JADU projects in Beverly Hills typically range $75,000-$135,000 with efficient fixtures and shared-wall utility routing.
How we do it
We verify owner-occupancy compliance, design the efficiency kitchen and separate entrance, permit through Beverly Hills Building & Safety, and build to the documented scope.
What Junior ADU & Interior Conversion Costs in Beverly Hills
| Item | Typical range in Beverly Hills |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000 - $155,000 |
| Interior JADU (all-in) | $75,000 - $135,000 |
| Above-garage ADU conversion | $95,000 - $175,000 |
Does a Junior ADU need its own meter in Beverly Hills?
No - a JADU shares utilities with the primary residence and does not require a separate electrical or water meter, though sub-metering is permitted if desired. Call (213) 698-7591 for an exact quote; estimates are free.
Can I convert a pool house to an ADU in Beverly Hills?
Yes, if the structure meets setback, ceiling height, and egress requirements; many 1920s-1950s pool houses need structural and insulation upgrades to qualify. Call (213) 698-7591 for an exact quote; estimates are free.
ADU Site Prep & Utilities in Beverly Hills
ADU site prep and utilities in Beverly Hills often determines whether a project proceeds at all - estate-era lots may have 80-year-old sewer laterals, undersized electrical panels, and compacted-fill hillside conditions that standard LA contractors underestimate. We handle ADU Site Prep & Utilities as a scoped, written-price phase within the same single contract, with geotechnical coordination for Trousdale Estates properties and fire-zone compliance for north hillside work.
Foundation & Grading
Signs you need it
Your hillside lot shows settlement cracks, your existing slab is under 4 inches, or Beverly Hills Building & Safety has flagged a geotechnical review requirement.
What it costs in Beverly Hills
Foundation and grading work in Beverly Hills typically runs $35,000-$85,000 for hillside compaction, retaining, or stem-wall upgrades.
How we do it
We engage a soils engineer, produce the grading plan for Beverly Hills review, execute the earthwork with documented progress photos, and pour to the structural engineer’s specification.
Electrical Panel Upgrade
Signs you need it
Your main panel is under 200 amps, contains fused disconnects, or the load calculation for the ADU exceeds remaining capacity.
What it costs in Beverly Hills
Electrical panel upgrades in Beverly Hills typically range $8,500-$18,000 including permit, SCE coordination, and new service lateral if required.
How we do it
We perform the load calculation, specify the new panel and grounding system, pull the Beverly Hills electrical permit, and coordinate Southern California Edison for service cutover.
What ADU Site Prep & Utilities Costs in Beverly Hills
| Item | Typical range in Beverly Hills |
|---|---|
| Foundation & grading (hillside) | $35,000 - $85,000 |
| Electrical panel upgrade | $8,500 - $18,000 |
| Plumbing lateral replacement | $12,000 - $28,000 |
Does Beverly Hills require a geotechnical report for all ADUs?
No - flat-district projects on undisturbed soil typically do not, but hillside properties including Trousdale Estates almost always do due to 1950s graded-fill conditions. Call (213) 698-7591 for an exact quote; estimates are free.
Can you upgrade utilities without building the ADU yet?
Yes - we scope and price utility upgrades as a standalone phase, though we design them to match the eventual ADU load so nothing is ripped out later. Call (213) 698-7591 for an exact quote; estimates are free.
Brands We Service in Beverly Hills
We specify and coordinate prefab and modular systems from Plant Prefab, Tuff Shed, and James Hardie within our single-contract design-build model, with parts and expertise stocked locally for Beverly Hills projects. See our brands for full compatibility details and typical turnaround.
Pricing for ADU in Beverly Hills, CA
| Service | Typical range in Beverly Hills |
|---|---|
| Room-to-ADU conversion | $85,000 - $155,000 |
| Interior JADU | $75,000 - $135,000 |
| Above-garage ADU conversion | $95,000 - $175,000 |
| Foundation & grading (hillside) | $35,000 - $85,000 |
| Electrical panel upgrade | $8,500 - $18,000 |
| Plumbing lateral replacement | $12,000 - $28,000 |
| Gas line extension | $4,500 - $12,000 |
| Landscaping & hardscape restoration | $15,000 - $45,000 |
Prices push higher in Beverly Hills for hillside geotechnical work, Chapter 7A fire-resistant materials, and the premium finishes typical of estate-era conversions. Every project receives a written price before any work starts, per Haven Standard Clause 1 - no exceptions.
Neighborhoods We Serve in Beverly Hills
We work across Beverly Hills’s distinct districts, from the flat estate zone to the Trousdale Estates hillside, with crews scheduled from our Los Angeles office for consistent response times throughout the 90036, 90046, 90069, and 90095 ZIP codes.
- Trousdale Estates
- Westwood
- Westwood Village
- Flat District / Golden Triangle
- Beverly Hills Post Office area
Service Area - Cities Near Beverly Hills
Ellery ADU Studio serves homeowners throughout the Westside and San Fernando Valley, with regular projects in West Hollywood, CA, Studio City, CA, Culver City, CA, and Sherman Oaks, CA. Each city maintains its own permitting authority and fee structure, and we maintain active qualification with all of them.
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 Building & Safety typically completes initial plan check for ADUs in 8-12 weeks, longer than LA’s DBS due to independent staffing and design-review requirements for visible exterior changes; hillside projects add 2-4 weeks for geotechnical referral.
California law limits HOA prohibition of ADUs, but Beverly Hills’s older CC&Rs may impose design guidelines, height limits, or material requirements that we review during preliminary due diligence before quoting.
Yes - we serve the full Beverly Hills city limits including commercial-adjacent residential zones, with the same permit coordination and written-price structure applied to every project regardless of landmark proximity.
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."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."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.