New Detached ADU in Beverly Hills - Design, Permits and Build Under One Contract

Fast, Reliable New Detached ADU Across Beverly Hills

A new detached ADU in Beverly Hills typically runs $285,000-$620,000 all-in, from permit-ready drawings through final inspection, with timeline and cost driven by whether your lot sits on the flats south of Santa Monica Boulevard or the hillside slopes north of Sunset. We’re Ellery ADU Studio, and our New Detached ADU team has designed, permitted, and built 900+ ADUs since 2015 - including multiple projects in the Beverly Hills flats and the Trousdale Estates area. Dispatch and scheduling are coordinated from our Los Angeles office, and crews serve Beverly Hills properties directly. Call (747) 322-4648 to schedule your free estimate; every project receives a written price before any work starts, per Haven Standard Clause 1.

Call (747) 322-4648

Why Ellery ADU Studio Burbank Is Beverly Hills’s Preferred New Detached ADU Company

Beverly Hills homeowners know the city runs its own Building & Safety department, entirely separate from LADBS, with its own submittal requirements and a permit timeline that moves on its own schedule. We’ve learned that rhythm. Our documented photo record on every visit means clients see exactly what we found - expansive soil conditions on a hillside lot, setback calculations on a 12,000-square-foot flat parcel, or the stucco match sample that cleared objective design standards - not a summary of how we felt about it.

Our 365-Day Done Right Promise applies to every Beverly Hills project: if the finished ADU is not built to the permitted drawings, we make it right, in writing, before the project starts. A live person answers our phones 24/7. And our Free Second Opinion is available on any written estimate already in hand - bring us a competing quote and we’ll tell you exactly where the scope differs from ours.

Our New Detached ADU Services in Beverly Hills

Custom Built ADU

Custom built ADUs in Beverly Hills demand precision because the city’s objective architectural design standards effectively require visual continuity with the primary residence. A 1930s Spanish Colonial on Roxbury Drive or a Tudor Revival on Camden Drive will face pushback if the ADU presents a flat-roof contemporary facade - standards that neighboring West Hollywood and Culver City have largely abandoned under state ADU law pressure, but that Beverly Hills has defended through its ordinance. We design to match: stucco texture, roof pitch, window proportions, material palette. On a recent project north of Sunset in the Trousdale area, we specified James Hardie fiber-cement backing behind custom stucco to maintain the Spanish Colonial street presence while meeting current fire and structural codes. Custom built ADUs in Beverly Hills typically run $320,000-$620,000 all-in, depending on square footage, foundation complexity, and finish level.

Prefab ADU Installation

Prefab ADU installation in Beverly Hills works when the unit design can be adapted to the city’s aesthetic requirements and the lot conditions are straightforward. We specify and coordinate systems from Abodu, Cover, and Dvele - brands whose modules we can clad and detail to satisfy Beverly Hills’s objective standards. On flat lots south of Santa Monica Boulevard, where soils are stable and foundation requirements are simpler, prefab can compress the construction timeline significantly. The key is front-loading the design phase: we work with the manufacturer’s engineering team to produce a Beverly Hills-ready permit set that includes the aesthetic modifications before we ever file with Building & Safety. Prefab ADU installations in Beverly Hills typically run $285,000-$450,000 all-in.

Modular ADU

Modular ADUs differ from prefab in their structural system and transport logistics. In Beverly Hills, the constraint is rarely the module itself - it’s the crane access on tight flat lots or the steep driveway approaches common in the hills north of Sunset. We evaluate every modular candidate for site access, then design the foundation and utility connections as a single system with the module. Our one-contract design-build model means the modular manufacturer, our foundation crew, and our utility team all answer to the same scope document - no designer-versus-builder blame gap if the crane pad location conflicts with the sewer lateral. Modular ADUs in Beverly Hills typically run $295,000-$480,000 all-in.

Studio ADU

Studio ADUs - 300 to 450 square feet, single open living space - are the most common starting point for Beverly Hills homeowners testing the ADU opportunity. On the flats, we regularly convert existing detached multi-car garages or pool houses into studio ADUs, preserving the footprint and working within existing setback lines. This matters in Beverly Hills because the city’s separate Building & Safety department interprets setback and height limits with its own specificity, and an existing structure’s grandfathered position often saves months of variance negotiation. Studio ADUs in Beverly Hills typically run $285,000-$380,000 all-in for conversions, $320,000-$420,000 for new construction.

1-Bed & 2-Bed ADU

One-bedroom and two-bedroom ADUs in Beverly Hills follow the same design-standard and soils-report requirements as smaller units, but the added square footage amplifies any foundation or utility miscalculation. On hillside lots, a 2-bed ADU’s larger footprint means more linear feet of foundation in potentially expansive soil - the soils and geology report becomes more critical, not less. We size utilities for the full occupancy load from the start: a 2-bed unit with kitchen and laundry demands a larger water service and electrical panel upgrade than a studio, and we specify those in the initial permit set rather than discovering them mid-construction. One-bed ADUs in Beverly Hills typically run $340,000-$480,000 all-in; two-bed units run $380,000-$620,000.

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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 - all within the same single contract that covers design, permitting, and construction. For Beverly Hills projects, James Hardie fiber-cement products appear frequently in our specifications: they’re code-compliant for fire zones, accept custom stucco and trim details that satisfy the city’s objective design standards, and our crews have installed them on multiple Spanish Colonial and Tudor Revival-matching ADUs in the flats and hills. We don’t ask clients to manage manufacturer relationships separately. Every brand coordination, every warranty registration, every delivery schedule is our scope, documented in the same written price you receive before work starts.

Common New Detached ADU Problems We See in Beverly Hills Homes

• Design rejection under objective architectural standards. Filing a flat-roof contemporary ADU design on a Spanish Colonial or Tudor Revival primary residence gets rejected by Beverly Hills’s objective architectural design standards, which most neighboring cities have abandoned under state ADU law pressure. We match the primary residence’s style in the initial permit set, not as a revision.
• Foundation redesign after skipping soils reports on hillside lots. North of Sunset, expansive alluvial soils on the Santa Monica Mountain slopes routinely require soils and geology reports. Skip this step and discover problematic soil conditions mid-permit, and you add months to an already slow Beverly Hills Building & Safety timeline.
• Wrong department submittal. Treating Beverly Hills like LADBS or a neighboring jurisdiction and preparing documents for the wrong department gets your package bounced. Beverly Hills runs its own Building & Safety department with its own submittal requirements, checklists, and review sequences.
• Underestimating utility upgrades on estate lots. Many Beverly Hills properties, especially in the flats, have aging water and electrical services sized for a single 1920s-1960s residence. A new 2-bed ADU with full kitchen and laundry often requires service upgrades that must be coordinated with Beverly Hills Building & Safety and the utility providers - a parallel permit track we build into our timeline from day one.

Pricing for New Detached ADU in Beverly Hills, CA

We Also Serve Cities Near Beverly Hills

Our crews work throughout the metro area, including Beverly Hills and neighboring West Hollywood, Studio City, Culver City, and Sherman Oaks. Each city has its own permit department, its own timeline, and its own common conditions - we adjust the permit set and the construction approach accordingly, never copy-pasting a package built for another jurisdiction.

FAQs - New Detached ADU in Beverly Hills