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

Trusted ADU Design & Permitting for Los Angeles Homeowners

ADU design and permitting in Los Angeles typically costs $8,500-$28,000 for the full design-build package, with permit approval timelines ranging from 4 to 12 months depending on your property’s zoning and the complexity of your site. At Ellery ADU Studio Los Angeles, we’ve designed, permitted, and built over 900 ADUs since 2015 - the year California’s ADU laws fundamentally changed - and every project starts with a written price before any work begins, per Haven Standard Clause 1. Call (424) 551-7706 to schedule your free estimate; a live person answers 24/7.

Call (424) 551-7706

Los Angeles homeowners face a specific challenge: the city’s ADU ordinance overlays state law with local requirements that vary block by block. A property in Venice with an R-1 zone and Coastal Commission overlay faces entirely different setback and height restrictions than a lot in Studio City under the Baseline Mansionization Ordinance. We’ve navigated these layers for properties from Westchester to Beverly Hills, and we document every finding in your permit set rather than summarizing what we think will pass.

Our clients are homeowners who bought between 2015 and 2025 at peak prices and now need the ADU to pencil as a long-term asset - rental income, multigenerational housing, or future sale value. They don’t want a designer who disappears after the drawings are stamped, or a contractor who claims the permit set was “just conceptual.” Our single-contract model eliminates that gap: Nadia Ellery’s team produces the drawings, submits the permit application, and builds to those exact drawings at the written price.

What Our ADU Design & Permitting Service Includes

Site Assessment

A site assessment is the foundation of every ADU project we take on in Los Angeles. We evaluate your lot’s specific constraints - setback distances from property lines, existing utility locations, slope and drainage patterns, and any protected trees under the city’s Protected Tree Ordinance. For a recent project in Sherman Oaks, we found the sewer lateral ran directly through the proposed ADU footprint; we rerouted it in the design phase rather than discovering it during excavation. You need this before any drawings begin, because what the city will approve depends entirely on what your site can accommodate. Our assessment includes a documented photo record of existing conditions and a written findings report with recommended ADU types - garage conversion, detached new build, or Junior ADU - ranked by feasibility and your budget.

ADU Design & Blueprints

The ADU design and blueprints - our permit set - is our core product, not an afterthought. We produce architectural drawings, structural calculations, MEP (mechanical, electrical, plumbing) plans, and energy compliance documentation that meets LADBS’s current checklist requirements. Every sheet is drawn to the scale and detail level that plan checkers expect - we’ve learned their common objections over 900+ submissions and design to avoid them. In West Hollywood, for example, we know plan checkers flag insufficient fire separation between an attached Junior ADU and the primary residence; we detail that assembly explicitly rather than leaving it to the builder’s interpretation. You need this service when you’re ready to move from “thinking about an ADU” to having buildable plans with a realistic construction price attached. Our drawings include fixture schedules, finish specifications, and the structural system - whether conventional stick-frame, Abodu panelized, or Cover’s modular system - so your written construction price has no hidden assumptions.

Permit Application

Permit application in Los Angeles means navigating LADBS’s online permitting system, scheduling plan check appointments, and responding to correction letters with revised sheets. We handle the full submission, not just the initial upload. For a detached ADU in Inglewood, we recently managed three rounds of corrections - all on the city’s side regarding their own zone map discrepancy - and kept the project on schedule by anticipating the delay and front-loading other approvals. You need this service if you want your permit approved in months rather than years. Our team tracks your application daily, attends plan check meetings in person when required, and provides you with the permit set stamped “Approved” along with the inspection sequence schedule before construction begins.

HOA & Zoning Compliance

HOA and zoning compliance is where many Los Angeles ADU projects stall. California law limits HOAs from outright banning ADUs, but many associations in Beverly Hills, West Los Angeles, and Culver City have design guidelines - roof pitch, exterior materials, parking requirements - that functionally block projects if not addressed early. We review your CC&Rs in the site assessment phase and design to comply, or document the state-law preemption where applicable. Zoning compliance includes verifying your lot’s specific zone, any Specific Plan overlays (like the Venice Coastal Zone or Hollywood Community Plan), and whether your property falls under rent control or relocation assistance requirements. You need this before submitting plans, because a permit approved in conflict with HOA rules or zoning overlays can be challenged after construction starts. We provide a written compliance memo with every permit set, citing the specific code sections and HOA provisions that govern your project.

Title 24 Energy Compliance

Title 24 is California’s energy code, and compliance is mandatory for every ADU permit in Los Angeles. We model your project’s energy performance using approved compliance software, specifying insulation values, window U-factors, HVAC efficiency, and solar readiness requirements. For a garage conversion in Santa Monica, we specified a heat pump water heater and mini-split system that exceeded Title 24’s baseline by 12%, reducing the owner’s operating costs and satisfying the city’s additional energy efficiency goals. You need this service because LADBS will not issue a permit without a signed Title 24 compliance form, and many designers treat it as a last-minute add-on that triggers expensive changes. We integrate energy compliance into the design from the first schematic, so your mechanical and envelope specifications are coordinated with your budget and performance goals.

Brands We Service for ADU Design & Permitting

We specify and coordinate prefab and modular ADU systems within our single-contract model, including Abodu, Cover, and Dvele. For Abodu units, we’ve completed the full design integration - foundation design, utility connections, and LADBS plan check - for properties in Venice and Westchester, working with their panelized wall system and factory-built modules to meet California’s factory-built housing approval requirements. Cover’s steel-frame modular system requires specific structural coordination with our foundation design; we’ve managed this for hillside lots in Studio City where conventional framing would have triggered geotechnical complications. Dvele’s smart-home-integrated units need additional electrical planning for their low-voltage and solar-battery systems, which we detail in our MEP plans rather than leaving to field decisions.

We also work with Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie systems when they fit the project constraints. James Hardie’s fiber-cement siding is our default exterior specification for conventional builds in coastal zones - it meets the salt-air durability requirements we see in Marina del Rey and Playa del Rey without the maintenance cycle of wood siding. Whether you arrive with a preferred brand or need us to recommend the system that fits your lot and budget, we coordinate the full design, permitting, and construction within one written price.

Signs You Need ADU Design & Permitting Right Now

• Your garage sits unused while your mortgage payment climbs. In Los Angeles, a converted garage ADU typically rents for $1,800-$2,800 monthly - income that offsets rising property taxes and interest rates. Every month of delay is a month of lost revenue that compounds over the 30-year life of the asset.
• Your adult child needs housing and the market offers nothing affordable. The median rent for a one-bedroom in West Los Angeles exceeds $2,500. A Junior ADU - converted from existing interior space with a separate entrance - costs less to build than two years of market rent and remains your property.
• Your property’s zoning allows ADUs today, but the next Community Plan update may restrict them. Los Angeles updates its Community Plans on rolling schedules; the Venice and Downtown plans have already seen density restrictions tighten. Your current entitlements are worth documenting now.
• You’re holding a contractor’s estimate that lacks a permit set or written scope. We provide free second opinions on any written estimate already in hand. Most “estimates” we review assume the property has no constraints, then balloon by 40% once the real design begins.
• Your neighbor’s ADU project revealed problems you didn’t know your lot had. If their excavation hit undocumented utilities, or their permit was denied for a setback you share, your property likely has the same conditions. A site assessment now prevents surprises later.

Our ADU Design & Permitting Process - Step by Step

1. 1
   Free estimate and site assessment. We visit your property, photograph existing conditions, measure setbacks and utilities, and review your goals and budget. Within 48 hours, you receive a written findings report with recommended ADU types and a written price for design and permitting - no call-for-pricing, no range that doubles later. This is Haven Standard Clause 1: the price is locked before work starts.
2. 2
   Schematic design and zoning verification. We produce preliminary floor plans and elevations, then submit a preliminary plan check to LADBS or your local jurisdiction to confirm zoning interpretation before we invest in full construction documents. For a project in Hawthorne, this step caught an R-2 zone overlay that changed the required parking ratio - we redesigned before the permit set was complete, saving six weeks.
3. 3
   Permit set production. Our team completes architectural, structural, MEP, and energy compliance drawings to LADBS submission standards. Every sheet is cross-referenced; every specification is named. You receive the full set for review before submission, with a walkthrough meeting to explain any details.
4. 4
   Permit submission and plan check management. We submit electronically, track daily, attend plan check meetings, and respond to corrections with revised sheets. We provide you with the correction letter and our response, so you see exactly what the city asked and how we addressed it. The approved permit set and inspection schedule are delivered before construction begins.
5. 5
   Construction to the approved drawings at the written price. Because we designed what we build, there is no designer-builder gap to exploit. Our 365-Day Done Right Promise, backed in writing before construction starts, means if the finished ADU is not built to the permitted drawings, we make it right. The documented photo record from every visit shows you what was found and what was done, not a summary of how it felt.

How Much Does ADU Design & Permitting Cost in Los Angeles?

ADU Design & Permitting Near Los Angeles - Our Service Area

We design and permit ADUs across Los Angeles and the immediate metro core, including Culver City, West Los Angeles, Santa Monica, Venice, Westchester, Beverly Hills, West Hollywood, Inglewood, Hawthorne, Studio City, and Sherman Oaks. Response time for initial site assessments is typically 3-5 business days from call to visit in the basin; hillside properties in the Santa Monica Mountains or canyon areas may require 5-7 days to coordinate access and geotechnical consultation. Every property receives the same permit-set-first approach, whether it’s a 3,000-square-foot lot in Venice or a half-acre in the Hollywood Hills.

Frequently Asked Questions - ADU Design & Permitting in Los Angeles

Schedule Your ADU Design & Permitting Service in Los Angeles Today

Call (424) 551-7706 to schedule your free estimate. A live person answers 24/7. You’ll receive a written price before any work begins, a documented photo record on every visit, and the 365-Day Done Right Promise in writing - the Haven Standard we’ve applied to over 900 ADU projects since 2015. No obligation, no call-for-pricing, no surprises.

Written by Nadia Ellery, Owner at Ellery ADU Studio Los Angeles, serving Los Angeles since 2015.