ADU Design & Permitting in Los Angeles - One Fixed Price, Permits Handled

Fast, Reliable ADU Design & Permitting Across Los Angeles

ADU design and permitting in Los Angeles typically runs $8,500-$18,000 for the full permit set and application, with garage conversion ADUs starting around $145,000 all-in and new detached ADUs in Los Angeles from $220,000. We’re Nadia Ellery’s team at Ellery ADU Studio, and we’ve designed, permitted, and built more than 900 ADUs since 2015 - the year California’s ADU laws shifted. Our Los Angeles office coordinates dispatch and scheduling locally, and we serve homeowners from the Valley to South LA with crews who know LADBS’s permit portal, inspection backlog, and the specific protocols that govern alley-fed utilities across this city’s flatland grid.

Call (424) 523-8492

Call (424) 523-8492 to schedule your free estimate. We’ll bring a written price before any work starts, per Haven Standard Clause 1.

Why Ellery ADU Studio Van Nuys Is Los Angeles’s Preferred ADU Design & Permitting Company

Los Angeles is the epicenter of California’s ADU reform wave, and the city’s own streamlined ordinance - combined with LADBS’s pre-approved Standard Plan Program and the vast inventory of car-culture-era detached garages built across the San Fernando Valley, Eastside, and South LA flatlands between the 1940s and 1970s - makes garage-to-ADU conversion the dominant project type here at a scale and pace unmatched anywhere else in the country. With LA rents among the highest in the nation and state law preempting most local restrictions, homeowners are converting at record volume, meaning the real competitive advantage for contractors is mastering LADBS’s specific permit portal, inspection scheduling backlog, and the nuances of the city’s tiered JADU/ADU/multi-ADU rules rather than just the construction itself.

Our ADU Design & Permitting team has completed hundreds of projects in Los Angeles neighborhoods from Van Nuys to Silver Lake to Leimert Park. Nadia Ellery founded this studio in 2015 specifically to close the designer-versus-builder blame gap that derails most ADU projects - one contract, one written price, one accountable party. Reviews from Los Angeles customers consistently cite our documentation: the permit set delivered as a core product, not an afterthought, and the photo record from every site visit that shows exactly what was found and what was done. We don’t promise speed we can’t control - LADBS sets the inspection timeline - but we do promise that your plans will be right the first time through the counter, because we design for the conditions we actually find in Los Angeles housing stock, not generic assumptions.

Our ADU Design & Permitting Services in Los Angeles

Site Assessment

Every Los Angeles ADU starts with a site assessment that maps the conditions your permit set must address. On the flatland grid from Van Nuys to Watts, detached garages are alley-loaded with no street frontage, and LADBS-compliant plans here route the sewer lateral and new electrical service through the alley - where the Bureau of Sanitation and LADWP run different inspection protocols than street-side connections. A detail out-of-area designers routinely miss. Our crew documents your existing slab thickness, panel amperage, roof structure, and utility access point before a single line is drawn. In Los Angeles, this step typically takes 2-3 hours and produces a written findings report with photos.

ADU Design & Blueprints

We produce permit-ready construction documents calibrated to LADBS’s current submittal requirements, including Title 24 energy compliance calculations and structural engineering for seismic zone D - the highest classification. Los Angeles’s mild Mediterranean climate means low heating and cooling loads, but the seismic requirements add shear walls, hold-downs, and foundation tie-downs that a non-local designer might under-specify. For prefab and modular systems, we specify and coordinate Abodu, Cover, and Dvele units within the same single contract, ensuring the manufacturer’s drawings integrate with our site plan and LADBS’s Standard Plan Program where applicable. Every set includes the documentation the client receives: full drawings, energy compliance forms, and a written scope locked at signing under Haven Standard Clause 5 (No Surprises).

Permit Application

LADBS processes thousands of ADU permits annually, and the permit application is where most Los Angeles projects stall. We submit through LADBS’s online portal with a complete package: plans, engineering, energy docs, and the property-specific zoning verification that proves compliance with the city’s tiered JADU/ADU/multi-ADU rules. Because we design for the alley-fed utility protocol and the 60-amp panel reality common to 1940s-1970s Los Angeles housing stock, our applications clear plan check faster than packages drawn by out-of-area firms who assume street-side connections and modern electrical service. We track the inspection scheduling backlog and coordinate corrections directly with LADBS plan checkers, not through the homeowner.

HOA & Zoning Compliance

State law preempts most HOA restrictions on ADUs in Los Angeles, but HOAs still attempt to enforce design guidelines, parking replacement rules, and owner-occupancy requirements that don’t apply. We review your CC&Rs against current California ADU law - AB 68, SB 13, AB 881 - and produce a written compliance memo that you can present to your board. For zoning, we verify your lot’s specific tier: whether it qualifies for a JADU (attached, owner-occupied), a standard ADU (detached or attached, no occupancy requirement), or multiple ADUs under the latest state density bonuses. In Los Angeles, this matters because the city has its own overlay districts and R-1 variations that affect setback, height, and parking waiver eligibility.

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Trusted Brands We Service in Los Angeles

We specify and coordinate prefab and modular systems from James Hardie, Abodu, and Cover within our single-contract design-build model, meaning the manufacturer’s drawings, our site prep, and the LADBS permit are one integrated package - not three separate contracts pointing at each other when something doesn’t fit. For Los Angeles homeowners, this eliminates the coordination failures common when a designer specifies a unit they’ve never installed or a builder receives factory drawings they didn’t review. We maintain relationships with these manufacturers’ West Coast distribution and keep current on their lead times, foundation requirements, and Title 24 compliance packages so your permit set reflects actual product specifications, not catalog assumptions.

Common ADU Design & Permitting Problems We See in Los Angeles Homes

• Alley-fed utility connections rejected at plan check. Plans drawn for street-fed sewer and electrical get kicked back because the garage is alley-loaded and the lateral must be permitted through the Bureau of Sanitation’s alley protocol, not the standard street-side approval. We catch this in site assessment and design for it from the first submission.
• Original 60-amp or 100-amp panels discovered post-submittal. These panels are still common on 1940s-1970s Los Angeles homes. Finding them after plans are in forces a service upgrade that stalls the permit and de-energizes the ADU schedule. We test and document amperage during site assessment, then write the upgrade into the contract as a priced allowance if needed.
• Non-reinforced, undersized garage slabs failing structural review. The 4-inch slabs common to this era weren’t built to carry residential loads or meet current seismic code. Once walls open, they require new footings or full slab replacement - work a design-only quote never covered. Our contracts include a slab-and-foundation allowance with a written trigger: if the engineer calls for replacement, the price is already agreed.
• Failed waterproofing and undersized framing hidden until demolition. On a 1953 alley-loaded garage in Van Nuys, our crew opened the walls for a conversion and found the 60-amp service panel, non-reinforced 4-inch slab, and a sewer lateral that drained to the alley rather than the street. We redesigned the plans with alley-side connections, wrote a service-upgrade and footing allowance into the contract, and priced the Title 24 and shear-wall engineering before pulling the LADBS permit - no surprises at final inspection.

Pricing for ADU Design & Permitting in Los Angeles, CA

We Also Serve Cities Near Los Angeles

Our crews work throughout the metro core and inner suburbs, including ADU Design & Permitting in Los Angeles and neighboring Culver City, West Hollywood, Beverly Hills, and Glendale. Each city maintains its own planning department with distinct submittal requirements, and we maintain current permit protocols for all four.

FAQs - ADU Design & Permitting in Los Angeles