ADU Design & Permitting in Los Angeles - Design, Permits and Build Under One Contract

Fast, Reliable ADU Design & Permitting Across Los Angeles

ADU design and permitting in Los Angeles runs $8,500-$22,000 for the full architectural and engineering package, with LADBS permit fees adding another $3,200-$7,800 depending on valuation and scope. A garage conversion ADU in Los Angeles typically totals $145,000-$215,000 all-in, drawings through final inspection, while a new detached unit runs $285,000-$420,000. Call (424) 407-8266 to schedule your free estimate - every project receives a written price before any work starts, per Haven Standard Clause 1.

Call (424) 407-8266

We’re a design-build studio, not a designer who hands off to a contractor and walks away. Our ADU Design & Permitting team handles the drawings, the permit set, and the construction under one contract at one written price. Dispatch and scheduling are coordinated from our Los Angeles office; crews serve Los Angeles locally. That matters because an ADU in this city lives or dies at the permit counter, and the difference between a six-week approval and a six-month ordeal is whether your team understood LADBS’s Standard Plan Program eligibility before they quoted.

Why Ellery ADU Studio North Hollywood Is Los Angeles’s Preferred ADU Design & Permitting Company

We’ve designed, permitted, and built over 900 ADUs since 2015 - the year California’s ADU laws shifted - and a significant share of those have been new detached ADUs in Los Angeles, from West Adams to Reseda. Our clients receive a documented photo record on every visit, a written price locked at signing, and the 365-Day Done Right Promise in writing before the project starts.

Los Angeles homeowners find us because they’ve already talked to a contractor who quoted a number without opening a wall. We don’t do that. Our site assessment includes a physical inspection of the existing structure, a preliminary Title 24 analysis, and a written scope with line-item pricing. No voicemail queues, either - a live person answers calls 24/7.

Response time to Los Angeles inquiries is same-day during business hours. We know the difference between an R1 lot in Jefferson Park with alley access and a hillside parcel in Laurel Canyon that triggers CalFire review. That local knowledge prevents the eligibility surprises that kill timelines.

Our license number appears on every page, verified, not just claimed. Background-checked, uniformed crews. And if you already have a written estimate in hand, we offer a Free Second Opinion - we’ll review it against what we find on site and tell you where the gaps are.

Our ADU Design & Permitting Services in Los Angeles

Site Assessment

Every Los Angeles ADU starts with a physical site assessment, not a satellite-photo guess. We inspect the existing structure, photograph conditions, and test what we can reach. On a 1920s bungalow garage in West Adams or Leimert Park, we’re looking for knob-and-tube wiring, notched framing from old termite repairs, and failed waterproofing where the garage slab meets the stem wall - all code-upgrade triggers once the permit is pulled. On a 1950s-1970s San Fernando Valley ranch in Reseda or Van Nuys, we’re checking whether the electrical panel and clay sewer lateral can carry a second unit. The assessment produces a written report with photos, a preliminary Standard Plan eligibility screen, and a line-item quote. Under Haven Standard Clause 5 (No Surprises), the scope is locked at signing; no door-side upsells, no scope creep.

ADU Design & Blueprints

Our architectural team produces permit-ready drawings calibrated to Los Angeles’s specific conditions. For flat lots on R1 zones with alley access - common in Jefferson Park, Highland Park, and Echo Park - we design against the LADBS Standard Plan Program geometries to compress plan check from months to weeks. For hillside lots in Silver Lake, Hollywood Hills, or Chatsworth that fail Standard Plan eligibility on slope, lot coverage, or existing setback, we engineer a full custom submittal from the start rather than waste time on a program that won’t accept the site. We also specify and coordinate prefab and modular systems from Abodu, Cover, and Dvele within the same single contract, so the manufacturer’s drawings integrate with our site plans and structural calcs rather than arriving as an afterthought.

Permit Application

Permit application in Los Angeles means LADBS, and LADBS means specific submittal packages with exact sheet counts, digital filing protocols, and inspection sequences that vary by project type. We handle the entire application: plan check responses, correction letters, resubmittals, and scheduling. For Standard Plan projects, we manage the reduced plan-check workflow and coordinate the required pre-construction meeting. For custom submittals, we track the full plan-check timeline and escalate when reviews stall. Our permit set is the core product, not an afterthought - every drawing is produced in-house, stamped where required, and cross-checked against the field conditions we documented during assessment.

HOA & Zoning Compliance

Los Angeles’s zoning overlay is dense: R1, R2, R3, R4, and various Specific Plans and Overlay Districts that modify base requirements. We verify zoning classification, check for HOA restrictions or CC&R prohibitions on ADUs, and confirm parking replacement rules under state law. In Beverly Hills-adjacent areas or certain Pasadena-bordering neighborhoods with active HOAs, we produce the compliance documentation the association requires and coordinate any required hearings. The zoning analysis is written, dated, and included in your project file.

Title 24 Energy Compliance

Every new ADU in Los Angeles must meet California’s Title 24 energy standards, and the 2019 and 2022 code cycles have tightened envelope and mechanical requirements significantly. For a garage conversion on a 1938 West Adams bungalow, this means insulating walls and roof to current R-values, specifying high-efficacy lighting, and often upgrading to a heat-pump water heater or mini-split system. For a new detached unit behind a 1960s Reseda ranch, we model the energy budget early so the HVAC specification doesn’t force a redesign mid-permit. Our Title 24 documentation is produced in-house and submitted with the permit package, not farmed out to a third party who disappears when corrections arrive.

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. For Los Angeles clients, this means the manufacturer’s structural and MEP drawings are integrated into our permit set from day one, not reconciled in the field after LADBS approval. James Hardie’s fiber-cement siding meets CalFire non-combustible cladding requirements for Very High Fire Hazard Severity Zone projects in the Hollywood Hills or Chatsworth. Abodu and Cover units arrive with pre-engineered Title 24 packages that we adapt to Los Angeles’s specific solar orientation and site conditions. We do not markup manufacturer pricing; our fee is for design, permitting, and construction coordination, disclosed in writing before you commit.

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

• Knob-and-tube wiring in 1920s-1950s garage conversions. Our crew opened the walls of a 1938 bungalow garage on a West Adams alley lot and found cloth-wrapped knob-and-tube feeding an undersized 60-amp service, plus a rear wall stud pack notched down to almost nothing by a past termite repair. We wrote the panel upgrade, reframing, and Title 24 envelope into a priced change order and got it signed before the LADBS inspector saw anything. Because the geometry cleared Standard Plan eligibility, the whole job still moved through plan check in weeks rather than months.
• Standard Plan eligibility failures on hillside lots. The LADBS Standard Plan Program offers pre-approved ADU blueprints that cut plan check dramatically, but its site eligibility rules around slope, lot coverage, and existing setback pre-screen out many hillside lots. The same program that speeds up a flat West Adams alley-garage conversion can force a Silver Lake or Laurel Canyon project back to a full custom submittal. We run this screen during assessment, not after submittal.
• Undersized utilities on post-war valley ranches. A 1950s-1970s ranch in Canoga Park or Van Nuys may present a simple rear yard, but the electrical panel and clay sewer lateral often can’t carry a second unit. We identify this during site assessment and price the upgrade into the original contract, not as a mid-permit surprise.
• CalFire requirements in Very High Fire Hazard Severity Zones. Roughly a third of LA’s residential hillside neighborhoods sit inside VHFHSZ designations, which impose ember-resistant vents, Class A roofing, and non-combustible exterior cladding. These aren’t add-ons; they’re engineered into the plan set before submittal. A contractor who treats an ADU in Bel Air or Chatsworth as a standard design-first exercise will hit a wall at plan check.

Pricing for ADU Design & Permitting in Los Angeles, CA

We Also Serve Cities Near Los Angeles

Our crews work throughout the metro area. We also handle ADU Design & Permitting in Los Angeles adjacent communities including Culver City, West Hollywood, Beverly Hills, and Pasadena. Zoning, setback, and HOA rules vary by jurisdiction; we verify local requirements for each municipality before quoting.

FAQs - ADU Design & Permitting in Los Angeles