New Detached ADU in West Los Angeles - Design, Permits and Build Under One Contract

Fast, Reliable New Detached ADU Across West Los Angeles

A new detached ADU in West Los Angeles typically costs $280,000-$520,000 all-in, from the first site visit through final inspection, depending on whether you choose a custom stick-built unit or a prefab system like Abodu or Cover. Most West Los Angeles projects we take on move from signed contract to permit in 6-10 weeks, with construction lasting 4-8 months for custom builds and 3-5 months for prefab installations. Call (747) 322-4648 to schedule your free estimate - every project receives a written price before any work begins, per Haven Standard Clause 1.

Call (747) 322-4648

We know the West Los Angeles market because we’ve designed, permitted, and built here since 2015. Our dispatch and scheduling run from our Los Angeles office, and our crews serve West Los Angeles neighborhoods including Palms, Mar Vista, and Sawtelle daily. The coastal marine layer, the 1940s-1960s post-war housing stock, and the City of LA’s specific ADU ordinances create conditions that inland contractors routinely misread. We’ve seen it. We price for it upfront.

Why Ellery ADU Studio Burbank Is West Los Angeles’s Preferred New Detached ADU Company

We’ve completed more than 900 ADUs across greater Los Angeles since 2015, and a significant share of those have been in West Los Angeles. Our clients in Palms, Mar Vista, and Sawtelle come to us after receiving quotes that didn’t account for alley addressing, vapor-barrier remediation, or electrical panel upgrades - the three items that blow budgets on westside detached ADU conversions. They stay because we name those costs in writing before demo day.

Response time to West Los Angeles is typically same-week for initial site visits. We’re not crossing county lines to get here. Our crews know the difference between a standard street-facing garage conversion and a rear-alley conversion that requires LA Bureau of Engineering sign-off. That local fluency saves weeks on permitting.

Our reviews from West Los Angeles clients consistently cite two things: the documented photo record we deliver after every site visit, and the fact that the final invoice matched the written quote. No change orders, no scope creep. Under Haven Standard Clause 5 (No Surprises), the scope is locked at signing.

We’re independently owned and operated, led by Nadia Ellery. Every crew member is background-checked and uniformed, and our license number appears on every page of this site - verified, not just claimed.

Our New Detached ADU Services in West Los Angeles

Custom Built ADU

A custom built ADU in West Los Angeles runs $320,000-$520,000 all-in, drawings through final inspection. This is the right choice when your lot has constraints - tight setbacks, mature trees you want to preserve, or a slope that requires engineered foundations - that a prefab module can’t accommodate. In West Los Angeles, we often recommend custom builds for corner lots in Mar Vista where the coastal marine layer demands specific moisture-management detailing, or for properties in Sawtelle where rear-alley access complicates crane placement and delivery logistics. Our architects produce the permit set in-house; our builders execute from those drawings. One contract, one written price, no designer-versus-builder blame gap.

Prefab ADU Installation

Prefab ADU installation in West Los Angeles typically costs $280,000-$420,000 all-in. We specify and coordinate systems from Abodu, Cover, and Dvele within the same single contract that covers design, permitting, and construction. Prefab works well on West Los Angeles lots with clear street or driveway access for crane delivery. The City of LA’s Standard Plan Program can accelerate permitting for certain prefab configurations, cutting plan-check time from months to days. We evaluate your lot in the first site visit and tell you honestly whether prefab or custom makes more sense for your access, your soil, and your timeline.

Modular ADU

Modular ADU construction in West Los Angeles falls in the $300,000-$460,000 range. Modular differs from prefab in that modules are built to California Factory-Built Housing standards and arrive 80-90% complete, requiring minimal on-site finish work. For West Los Angeles clients in Palms and Sawtelle with alley access too tight for a full prefab module, modular delivery in smaller sections can solve the logistics puzzle. We coordinate the factory schedule, the transport permits, and the crane operator - all under one written contract at one written price.

Studio ADU

A studio ADU in West Los Angeles - typically 350-450 square feet - runs $280,000-$380,000 all-in. This is the most common detached ADU we build on the Westside, and it rents for $2,500-$3,800/month in the current market. The compact footprint keeps construction costs controlled while still delivering a full kitchen, bath, and living-sleeping area. On 1940s-1960s Palms and Mar Vista lots with 5,000-7,500 square feet, a studio ADU often fits within existing setbacks without variance. We size the unit to maximize your rental income without triggering parking replacement requirements under current City of LA code.

1-Bed & 2-Bed ADU

One-bedroom detached ADUs in West Los Angeles typically cost $320,000-$440,000; two-bedroom units run $380,000-$520,000. The jump from studio to 1-bed opens your rental pool to young professionals working in the Sawtelle/Olympic tech cluster or at UCLA. A 2-bed unit commands the highest rents but requires careful attention to parking, utility capacity, and whether your existing main-house panel can handle the additional load. We model all three variables in the first site visit and price the electrical and utility work as a written allowance, not a guess.

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Trusted Brands We Service in West Los Angeles

We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie - but for West Los Angeles’s coastal conditions, we most often recommend Abodu and Cover for their moisture-management detailing and Title 24 compliance out of the box. Dvele’s smart-home integration appeals to tech-sector landlords in the Sawtelle corridor. We don’t sell brand inventory; we specify the system that fits your lot, your budget, and your rental strategy, then coordinate factory delivery, foundation prep, and utility tie-in under our single contract. Local parts and factory support mean warranty claims don’t turn into cross-country phone tags.

Common New Detached ADU Problems We See in West Los Angeles Homes

• No vapor barrier under 1940s-1960s garage slabs. The coastal marine layer in West Los Angeles pushes ground moisture through unprotected concrete year-round. A finished ADU built on that slab feels chronically damp and fails Title 24 energy compliance. We install a full vapor-barrier and slab-insulation assembly as baseline scope, priced in writing before demo.
• Single 15-amp garage circuits that can’t carry ADU loads. Kitchen, HVAC, and laundry together pull 60-100 amps. Reusing the existing circuit guarantees plan-check failure and creates a fire hazard. We price panel or sub-panel upgrades as a line item in every West Los Angeles quote.
• Rear-alley access requiring Bureau of Engineering re-addressing. Many Palms and Sawtelle lots have garage doors facing the alley, not the street. Converting these to legal ADUs requires re-routing utilities and obtaining a new address through LA’s Bureau of Engineering - a permitting wrinkle that surprises contractors pulling their first westside permit. We’ve handled dozens.
• Setback and height restrictions in dense West Los Angeles neighborhoods. Lots in Palms and Mar Vista often sit within 5 feet of property lines. A detached ADU must clear side and rear setbacks, plus height limits that vary by zone. Our permit set includes a full site survey and zoning verification; no surprises at plan check.

Pricing for New Detached ADU in West Los Angeles, CA

We Also Serve Cities Near West Los Angeles

Our New Detached ADU in West Los Angeles crews also work in Burbank, North Hollywood, Glendale, and Studio City. Each city carries its own permitting environment - Burbank’s separate municipal code, Glendale’s hillside grading requirements - and we quote accordingly. The same single-contract, one-written-price model applies everywhere we build.

FAQs - New Detached ADU in West Los Angeles