Fast, Reliable New Detached ADU Across Beverly Hills
A new detached ADU in Beverly Hills typically runs $380,000-$780,000 all-in, from permit set through final inspection, with custom finishes and long-lead millwork driving the calendar more than framing labor. We’re Ellery ADU Studio Westchester, and our New Detached ADU team serves Beverly Hills from our Los Angeles office, with crews who know the city’s separate Building & Safety Division, its estate-era lot patterns, and the permitting reality that stops most LA-qualified builders cold. Call (213) 698-7591 to schedule your free estimate - every project gets a written price before any work starts, per Haven Standard Clause 1.
Why Ellery ADU Studio Westchester Is Beverly Hills’s Preferred New Detached ADU Company
We’ve designed, permitted, and built ADUs across Beverly Hills since 2015, including custom 1-bed and 2-bed detached units in Pico-Robertson, studio ADUs in Sentous, and hillside work in Trousdale Estates where the city’s own geotechnical requirements apply. Our 900+ ADU portfolio includes documented photo records from every visit - clients receive evidence of what we found and what we did, not a summary of how it felt.
Beverly Hills homeowners find us because we don’t treat their city as an LA suburb. It’s a fully independent municipality with its own ADU ordinance, fee schedule, and design-review board. A builder who routinely permits through LA’s DBS must re-qualify here. We already have.
Response time to Beverly Hills is same-day for initial consultation scheduling. Our live person answers calls 24/7 - no voicemail queue, no callback promise that doesn’t materialize. And our Free Second Opinion applies to any written estimate already in hand, including those from competitors who later discover they filed with the wrong jurisdiction.
Our license number appears on every page, verified, not just claimed. Background-checked, uniformed crews. The 365-Day Done Right Promise is backed in writing before the project starts: if the finished ADU is not built to the permitted drawings, we make it right.
Our New Detached ADU Services in Beverly Hills
Custom Built ADU
Custom built ADUs in Beverly Hills start around $420,000 and run past $780,000 for estate-tier finishes. These are not flat-city spec builds. The Spanish Colonial Revival and Tudor stock in the flat district, plus the post-and-beam Mid-Century Modern homes in Trousdale Estates, demand architectural coordination that respects existing massing and materials. We produce the permit set, manage the design-review submission to Beverly Hills Building & Safety, and build under one contract at one written price. Custom millwork, architectural glass, and specialty hardware are specified early, ordered after the fixed price is signed, and tracked against the documented photo record.
Prefab ADU Installation
Prefab ADU installation in Beverly Hills ranges from $380,000-$520,000 for systems we specify and coordinate - Abodu, Cover, and Plant Prefab among them. The catch is jurisdiction: prefab manufacturers often assume LA DBS permitting, but Beverly Hills requires its own plan-check path and design-review clearance. We handle that re-qualification before the panel order is placed. On Trousdale Estates graded pads, we confirm the foundation system can accommodate the geotechnical realities before the manufacturer finalizes their shop drawings. Written price, fixed before ordering.
Modular ADU
Modular ADU projects in Beverly Hills - Dvele, Mighty Buildings, Boxabl - typically fall between $400,000 and $580,000. These systems compress the construction calendar, but they don’t compress the permitting calendar. Beverly Hills Building & Safety reviews modular foundation plans, crane-access routes, and fire-zone material compliance separately from LA. We coordinate the modular delivery with the soils investigation timeline and the design-review schedule so that long-lead interior finishes aren’t sitting in a warehouse while the city reviews the pad.
Studio ADU
Studio ADUs in Beverly Hills run $380,000-$480,000, though “studio” here often means something different than in surrounding cities. Estate-era lots in South Carthay and Pico-Robertson frequently have existing detached structures - pool houses, chauffeur garages, original guesthouses from the 1920s-1950s - with footprints and utility stubs that change the structural approach. We assess existing conditions against the Beverly Hills ADU ordinance, determine whether conversion or new construction yields the better asset, and quote both paths in writing.
1-Bed & 2-Bed ADU
One-bedroom detached ADUs in Beverly Hills typically range $420,000-$580,000; two-bedroom units run $520,000-$780,000 depending on finish level and hillside complexity. The 1-bed and 2-bed configurations are where the long-lead calendar really shows: custom cabinetry, architectural glass, imported hardware, and millwork matched to the primary residence. We fix the price before any of these items are ordered. Under Haven Standard Clause 5 (No Surprises), the scope is locked at signing; no door-side upsells, no scope creep.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Beverly Hills
We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie within the same single contract. For Beverly Hills’s Chapter 7A fire-zone requirements, James Hardie non-combustible siding and ember-resistant venting are standard on our hillside specifications - not an upgrade, not a surprise. We maintain relationships with regional distributors so that replacement components and finish-matching materials don’t add weeks to a project already constrained by design-review timelines. Every brand we name appears in the written scope, with model numbers, before the price is fixed.
Common New Detached ADU Problems We See in Beverly Hills Homes
- Filing with LA’s DBS instead of Beverly Hills Building & Safety. Contractors who work across the region routinely submit to LA’s Department of Building and Safety, then lose weeks re-qualifying under Beverly Hills’s separate fee schedule, setback standards, and design-review requirements. We file correctly the first time because we know which jurisdiction owns the parcel.
- Placing an ADU on a Trousdale Estates graded pad without soils data. The 1950s compacted-fill boundary can run directly under the logical footprint. Beverly Hills Building & Safety requires a geotechnical report for hillside ADUs that LA’s DBS would not demand on a comparable flat lot. We stage the investigation before finalizing the pad design.
- Specifying standard combustible materials on the north hillside. The Very High Fire Hazard Severity Zone covering Trousdale Estates and north Beverly Hills requires Chapter 7A ignition-resistant standards - non-combustible siding, ember-resistant vents, and defensible-space setbacks. We specify James Hardie and compliant venting from the permit set forward, not as a mid-project change order.
- Ordering long-lead finishes before the price is fixed. Architectural glass, custom millwork, and imported hardware drive the calendar on high-end Beverly Hills ADUs. Under Haven Standard Clause 1, the written price precedes every purchase order. No exceptions.
Pricing for New Detached ADU in Beverly Hills, CA
| Sub-Service | Typical Range (All-In) |
|---|---|
| Studio ADU | $380,000 - $480,000 |
| 1-Bed Custom Built ADU | $420,000 - $580,000 |
| 2-Bed Custom Built ADU | $520,000 - $780,000 |
| Prefab ADU Installation | $380,000 - $520,000 |
| Modular ADU | $400,000 - $580,000 |
What moves the number: hillside versus flat lot, geotechnical complexity, existing structure condition if converting, finish tier, and long-lead custom items. Every Beverly Hills project receives a written line-item quote before any work begins - Haven Standard Clause 1. No “call for pricing.” No range that widens at permit. The price we write is the price you pay, or we make it right under the 365-Day Done Right Promise.
Free estimates include a site assessment, preliminary setback analysis against Beverly Hills’s ADU ordinance, and a documented photo record of existing conditions. Call (213) 698-7591 to schedule.
We Also Serve Cities Near Beverly Hills
Our crews work across the metro core, including Beverly Hills, West Hollywood, Studio City, Culver City, and Sherman Oaks. Each city carries its own permitting jurisdiction and its own common failure modes - we don’t apply a flat-city template to hillside work or a hillside template to flat lots. The written price and documented photo record apply everywhere we build.
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 - New Detached ADU in Beverly Hills
No. Beverly Hills is a fully independent municipality with its own Building & Safety Division, its own ADU ordinance, and its own plan-check process entirely separate from LA’s DBS and LADWP. Contractors must re-qualify under the city’s distinct fee schedule, setback standards, and design-review requirements. We file directly with Beverly Hills Building & Safety on every project. Call (213) 698-7591 for a free estimate - we’ll confirm the correct jurisdiction for your parcel.
Many Trousdale Estates properties sit on artificially graded pads carved into the Santa Monica Mountains foothills in the 1950s, and the compacted-fill boundary can run directly under where a detached ADU would logically be placed. Beverly Hills Building & Safety requires a geotechnical report for hillside ADUs that LA’s DBS would not require on a comparable flat-city lot. We stage the soils investigation before finalizing the pad design so the footprint doesn’t have to move at plan-check. Call (213) 698-7591 - the investigation timeline is built into our written schedule.
Chapter 7A ignition-resistant standards: James Hardie non-combustible siding, ember-resistant vents, and defensible-space setbacks that constrain placement and materials. The north Beverly Hills hillside, including Trousdale Estates, falls within California’s Very High Fire Hazard Severity Zone. We specify these materials from the permit set forward, not as a mid-project change order. Call (213) 698-7591 for a site-specific material list - it’s itemized in the written quote.
Long-lead custom finishes, not labor. Architectural glass, imported hardware, custom millwork, and cabinetry matched to the primary residence often carry 12-16 week lead times. We fix the price before ordering any of these items, under Haven Standard Clause 1, and we sequence the permit approval, soils work, and rough framing so the finish package arrives when the structure is ready. The framing crew waits for the glass, not the other way around. Call (213) 698-7591 to review the critical path for your project.
Often yes, and it’s frequently the better asset play. Beverly Hills’s estate-era lots - particularly in Pico-Robertson, South Carthay, and the flat district - contain detached pool houses, chauffeur garages, and original guesthouses from the 1920s-1950s with existing footprints and utility stubs. We assess structural condition, setback compliance under the current ADU ordinance, and whether conversion or new construction yields more square footage and better long-term value. Both paths are quoted in writing. Call (213) 698-7591 for a free site assessment.
Written by Nadia Ellery, Owner at Ellery ADU Studio Westchester, serving Beverly Hills since 2015.