Garage Conversion ADU in Los Angeles - Plans, Permits & Build, One Fixed Price

Fast, Reliable Garage Conversion ADU Across Los Angeles

A garage conversion ADU in Los Angeles typically runs $95,000-$185,000 all-in, from measured drawings through final inspection, with most projects permitted in 8-16 weeks depending on whether your lot qualifies for the LADBS Standard Plan fast track. We’re Ellery ADU Studio, a design-build practice with our Los Angeles office coordinating dispatch and scheduling locally, and our crews work the full span of the city from the flatland bungalow blocks of West Adams and Leimert Park to the hillside parcels of the Hollywood Hills and Laurel Canyon. Because we handle the permit set, the build, and the final inspection under one contract at one written price, there’s no designer-versus-builder blame gap when a 1920s slab needs seismic ties or a hillside lot triggers WUI requirements. Call (213) 329-7167 to schedule your free estimate.

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Why Ellery ADU Studio West Hollywood Is Los Angeles’s Preferred Garage Conversion ADU Company

We’ve designed, permitted, and built more than 900 ADUs since 2015, the year California’s ADU laws shifted, and a significant share of those have been garage conversions across Los Angeles’s diverse housing stock. Our Los Angeles clients receive a written price before any work starts, per Haven Standard Clause 1, plus a documented photo record on every site visit and the 365-Day Done Right Promise backed in writing.

Our crews know the difference between a flatland Mid-City lot on a 5,500 sq ft parcel and a hillside property in the Very High Fire Hazard Severity Zone, and we price accordingly from the first meeting. We don’t quote a standard number and discover fault setbacks later.

A live person answers our phone 24/7. No voicemail queue, no callback that doesn’t materialize.

We also offer a Free Second Opinion on any written estimate already in hand. If another design-build practice or contractor has given you a scope, we’ll review it against what we find on your actual site.

Our Garage Conversion ADU Services in Los Angeles

Detached Garage Conversion

Detached garage conversions are the most common ADU type we build in Los Angeles, especially in neighborhoods like Leimert Park, West Adams, and Boyle Heights where 1920s-1950s bungalows sit on 5,000-7,500 sq ft lots with a one-car garage at the rear. These garages routinely have pier-and-beam or slab foundations with no seismic ties, uninsulated stud walls, and early Romex wiring. We assess the existing structure, tie the slab or upgrade the foundation, and build out a full permit set that complies with LADBS requirements. If your lot is flat and standard-sized, we may be able to use the Standard Plan Program and pull your permit over the counter.

Attached Garage Conversion

Attached garage conversions in Los Angeles often share a wall with a neighboring parcel, which triggers party-wall notice requirements and potential access disputes that can stall inspection if not handled at the permit stage. We identify these constraints during our initial site measure and build the notice timeline into the schedule. On tight flatland blocks in Mid-City and the eastern San Fernando Valley, we also coordinate staging to avoid blocking driveways and manage noise ordinances that limit work hours.

Garage JADU

A Junior ADU, or JADU, converts part of an existing garage while the remaining space stays as garage or storage, with a separate exterior entrance and efficiency kitchen. In Los Angeles, JADUs are limited to 500 sq ft and must be within the walls of the primary residence or an attached garage, though many homeowners pair a JADU with a full detached ADU on the same lot. We evaluate whether your garage footprint and zoning allow the JADU pathway, which has different parking and setback rules than a full ADU conversion.

Garage Partition & Bathroom Add

Some Los Angeles homeowners don’t need a full ADU but want to partition the garage into a usable studio space with a bathroom added. This is a lighter scope than full ADU conversion but still requires plumbing rough-in, venting, and compliance with LADBS mechanical and electrical codes. We see this frequently in hillside areas like Laurel Canyon where the garage is already a separate structure but the lot constraints or WUI requirements make a full ADU conversion disproportionately expensive.

Carport Conversion

Carport conversions in Los Angeles face a specific challenge: many carports lack any foundation at all, sitting on compacted earth or thin concrete pavers. We evaluate whether the existing structure can be enclosed under the Standard Plan Program or if the missing foundation triggers full discretionary review. On standard flatland lots, a carport conversion can be an economical path to a small ADU, but the scope changes significantly if the site is in a liquefaction zone or fault setback.

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Trusted Brands We Service in Los Angeles

We specify and coordinate prefab and modular systems from Abodu, Cover, and Plant Prefab within the same single-contract design-build model. For Los Angeles projects, this means we can drop a pre-engineered bath core or kitchen module into a garage conversion and have it inspected as part of the unified permit set, rather than managing separate vendor contracts. On the Leimert Park project off Degnan Boulevard, we used a Plant Prefab panel for the bath core and James Hardie siding for the exterior finish, both specified in the original written price. We don’t introduce brand options mid-project as upsells.

Common Garage Conversion ADU Problems We See in Los Angeles Homes

• Seismic and foundation gaps. The original slab on a 1920s bungalow garage in West Adams or Boyle Heights often has no rebar, no ties to the foundation, and no shear walls. We find this on roughly half our flatland garage conversions. Tying the slab and adding shear adds $8,000-$15,000 to the scope, and we disclose it in the written quote after our site measure, not after demolition starts.
• Party-wall notice failures. In dense Los Angeles flatland blocks, an attached garage conversion sharing a wall with a neighboring parcel can trigger required notice and access disputes. If the neighbor refuses access for inspection, the project stalls. We identify party-wall conditions during permit prep and build the notice timeline into the schedule.
• Hillside and hazard-zone reclassification. A garage inside the Very High Fire Hazard Severity Zone, like much of the Hollywood Hills and Santa Monica Mountains, falls out of the Standard Plan fast track. The project adds Class A roofing, fire-resistant siding, ember-resistant vents, and full discretionary review. This splits the cost and timeline dramatically from a flatland conversion.
• Constrained access and staging. Narrow lots in Mid-City and Boyle Heights often can’t fit a concrete truck or crane. Lack of off-street parking forces permitted lane closures that add cost before framing starts. We price the logistics in the original quote, including moving permits and night-before material staging.

Pricing for Garage Conversion ADU in Los Angeles, CA

We Also Serve Cities Near Los Angeles

Our Garage Conversion ADU in Los Angeles crews also work in Inglewood, Culver City, West Hollywood, and Glendale. Each city has its own ADU ordinance layered on state law, and we permit and build to the local standard in each jurisdiction.

FAQs - Garage Conversion ADU in Los Angeles