What ADU Permitting in Los Angeles Actually Involves
ADU permitting in Los Angeles is a multi-step city review process - not a single form.
An Accessory Dwelling Unit (ADU) - a secondary residential unit added to a single-family or multi-family property - requires full approval from the Los Angeles Department of Building and Safety (LADBS), the city agency that reviews, approves, and inspects ADU permit applications, before any work can start.
That approval isn't one submission. It's a sequence.
First, permit-ready drawings go to LADBS for plan check - the city's technical review of submitted drawings before a permit is issued. The plan check team flags corrections. You respond with revised drawings. That round can repeat. Once the drawings clear, the permit issues. Construction begins. Then inspection milestones - scheduled city inspections at framing, rough electrical, and other defined stages - must each pass before the next phase starts.
The process ends with a Certificate of Occupancy, the final approval issued after all inspections confirm the completed unit meets building code.
California state law under AB 2221 has shortened LADBS's ADU review timeline in recent years. Still, a submission with incomplete drawings or missing site data goes back to the correction queue. That alone can cost weeks.
SNA Remodeling Hollywood manages every step - from preparing your site plan (a scaled drawing showing the ADU's location, setbacks, and site features required for permit submission) to scheduling your final inspection.
Working Inside the LADBS Jurisdiction Every Day
Our office is at 1433 N Martel Ave - inside the city limits LADBS serves.
That matters more than it sounds. Los Angeles ADU permit submissions run through LADBS's Metro and West LA offices. The 90046 zip code sits directly in that jurisdiction. We're not filing paperwork remotely from another county.
Here's what most homeowners don't realize about the LA plan check process: LADBS reviewers often flag items specific to your property's parcel - setback measurements from a 1940s lot line, or utility easements that don't show up in standard parcel maps. Those flags look like problems. They're usually just data gaps that a well-prepared site plan closes on the first correction round.
Los Angeles also has more pre-1980 housing stock than almost any city in the country. Many Hollywood-area properties - including bungalows near Fountain Ave and older duplexes off Highland - were built before modern setback rules applied. That history affects how a site plan is drawn for LADBS review. We account for it before the first submission goes in.
When you work in a city every day, you learn how its agencies operate - not just what the forms say.
A Call We Often Get: "I Have Plans - Now What?"
Having drawings doesn't mean you're ready to submit. It means you're close.
I'm Liam Harris, founder of SNA Remodeling Hollywood. A situation we run into regularly goes something like this.
A property owner in Silver Lake or West Hollywood reaches out. They've already paid an architect for ADU drawings. They're holding a set of plans and ready to move. But LADBS requires more than architectural drawings to accept a submittal. You also need a fully dimensioned site plan, a Title 24 energy compliance report, structural calculations if the unit involves any new framing, and a completed permit application with the correct project valuation.
Missing any one of those delays the submittal - sometimes by weeks, depending on LADBS's current queue.
What we do in that situation is review what the client has. We identify what's missing. If the drawings are permit-ready, we supplement the package. If the drawings have gaps that will generate plan check corrections, we flag them before submission - not after.
The difference between a clean first submission and a first-round correction letter isn't always the drawings themselves. It's whether the full package was checked before it went in.
This is how ADU permitting in Los Angeles actually works when someone has done it more than once.
You Will Know Where Your Permit Stands at Every Stage
Your ADU permit has a trackable status inside LADBS's system - we monitor it for you.
LADBS uses an online permit tracking portal. Every submission gets a case number. Every plan check correction gets logged. Every inspection result gets recorded.
Many property owners aren't familiar with the portal or how to read it.
We check it. When a correction letter posts, we get it, review it, and prepare the response. You don't need to visit a building counter or call a city office to find out what happened. We tell you - plainly, in terms that make sense.
Your role during the permit process is minimal once we're engaged. We handle the city correspondence. We answer technical questions from reviewers. We book inspections at each milestone and confirm they're passed before moving to the next phase.
How We Move an ADU From Application to Approved
A permitted ADU in Los Angeles follows a defined sequence. We manage each step.
Our standards during the permit and construction process:
- Permit-ready drawingssite plan, floor plan, elevations, and energy compliance included in the first package
- Accurate project valuationcorrectly declared on the application so the permit fee is calculated right the first time
- Correction-round managementevery LADBS comment addressed in writing with revised drawings submitted promptly
- Inspection readinesseach construction phase completed to code before the inspection is scheduled, not after
- Clear owner communicationstatus updates at every major step, including plan check clearance and inspection results
- Coordinated timelinespermit milestones tracked alongside construction scheduling so the project doesn't stall between approvals
Every ADU we build goes through this same sequence. Permitting isn't a side task. It's built into the project from day one.
What Happens at Each LADBS Inspection Checkpoint
LADBS inspects ADU construction at multiple stages - each one must pass before work continues.
Permit Issuance and Site Posting
Before a shovel goes in the ground, the permit must be issued and posted on-site. We confirm the permit is in hand and the approved drawings are accessible to the inspector before any work begins.
Framing Inspection
Once framing is complete - walls, roof structure, any structural elements - LADBS sends an inspector to verify the framing matches the approved drawings. This is the stage where structural details matter most. We build to the approved plans so this inspection passes clean.
Rough MEP Inspections
Rough mechanical, electrical, and plumbing work is inspected before walls are closed. Running these inspections in the right order matters. Closing drywall before a rough inspection passes means tearing it back open.
Final Inspection and Certificate of Occupancy
The final inspection covers finished work, safety features, egress, and smoke and CO detectors. When the inspector signs off, LADBS issues the Certificate of Occupancy. That document is what makes the ADU a legal, rentable unit. We schedule the final and confirm all items are addressed beforehand so there's no delay at the finish line.
Los Angeles Neighborhoods We Permit ADUs In
SNA Remodeling serves a wide range of Los Angeles neighborhoods for ADU permitting and construction.
We work across Los Angeles, West Hollywood, Hollywood, Silver Lake, Culver City, Beverly Hills, Burbank, Glendale, Santa Monica, Studio City, Sherman Oaks, Van Nuys, Pasadena, and Encino. We also serve communities throughout the San Fernando Valley and the broader Greater LA area.
Start Your ADU Permit Review With SNA Remodeling
The fastest way to move your ADU forward is to get your permit package right from the start.
Call SNA Remodeling Hollywood at (323) 761-0179 or email info@snaremodeling.com to start the conversation. Tell us your property address and where you are in the process. We'll review what you have, identify what LADBS will need, and walk you through the next step. You can also learn more about our full ADU construction services, custom ADU plans, and ADU floor plans.
