FAQs

ADU / Garage Conversion Permit FAQs in Los Angeles

Common questions about Los Angeles ADU permits, garage conversions, costs, and timelines.

Frequently Asked Questions: Los Angeles ADU Permits

ADU and garage conversion permitting is one of the most active areas of Los Angeles building activity. Below are answers to the questions homeowners and contractors most frequently ask about the Los Angeles ADU permit process. For personalized project guidance, use Zermit AI at app.zermit.ai.

Can I convert my garage into an ADU in Los Angeles?

Yes. Garage conversions are one of the most popular ADU types in Los Angeles. They are permitted on most residential properties in zones allowing residential uses, and a legally built existing garage may be converted without meeting current setback requirements. An LADBS permit is required before any conversion work begins.

Do I need to replace the parking space if I convert my garage?

No. California state law and Los Angeles ordinances do not require replacement parking when a garage is converted to an ADU. This applies regardless of the property's location or proximity to transit.

How long does the Los Angeles ADU permit process take?

Using a pre-approved design from the LADBS Standard Plan Program, permit approval can take 2–3 weeks. Custom plan projects typically take 4–10 weeks or more for plan check review. The total project timeline from design to move-in is typically 6–12 months for a garage conversion.

Are there impact fees for Los Angeles ADUs?

ADUs under 750 square feet are exempt from local development impact fees under California state law. ADUs of 750 square feet or larger pay proportionate fees. School districts may separately assess school impact fees on ADUs larger than 500 square feet.

What is the maximum size for an ADU in Los Angeles?

Detached ADUs may be up to 1,200 square feet. Junior ADUs (JADUs) are limited to 500 square feet and must be created within the existing primary dwelling. Height limits vary: detached ADUs are generally limited to 16 feet, with up to 18–20 feet allowed near transit.

Can I rent out my Los Angeles ADU?

Yes — long-term rentals are permitted for ADUs in Los Angeles. Short-term rentals (e.g., Airbnb) are subject to the City of Los Angeles Home-Sharing Ordinance and are typically only permitted if the ADU is the host's primary residence and the host is properly registered.

What is the LADBS Standard Plan Program for ADUs?

The LADBS Standard Plan Program offers pre-approved ADU designs created by licensed architects and engineers. These designs have already been reviewed for California Building Code compliance. Selecting a standard plan reduces plan check time from months to as few as 2–3 weeks and often lowers overall permit costs. The program was expanded under AB 1332 effective January 1, 2025.

Does a garage conversion require a Certificate of Occupancy?

Yes. A Certificate of Occupancy is required before any ADU — including a garage conversion — can be legally occupied or rented. The Certificate is issued by LADBS after all final inspections are passed.

Need Help With Your Permit? Describe your project at app.zermit.ai and Zermit AI will identify which Los Angeles permits may be required, expected timelines, and documentation you will need to prepare.

Looking for a Licensed Contractor in Los Angeles? Explore licensed contractors and remodeling professionals on zermit.ai/contractors who can assist with permitted work and inspections.