Los Angeles ADU permits and regulations 2021

The Los Angeles County Department of Regional Planning relaxed its ADU laws in 2020, per new statewide laws. But keep in mind that planning departments for coastal areas often have separate building requirements, and L.A. is no exception.


Check out the resources below to learn more about specific L.A. requirements for your ADU project.


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Los Angeles ADU resources

Los Angeles ADU ordinance summary

A two-page document covering all the basic building requirements.

L.A. Department of Regional Planning’s ADU page

Offers an overview plus links to ordinances, application forms, and contacts.

Rental rate trends in Los Angeles

The average rent for a one-bedroom apartment in L.A. is $2,187 as of June 2021. For a two-bedroom, it’s $2,740.

Los Angeles plans and ordinances

Keep up to date on community planning efforts and any amendments to local ordinances.

Planning department contact info

(213) 974-6411

Financing options

Villa isn’t a lender, but we can connect you with lenders who specialize in both traditional and alternatives types of loans.

L.A. ADU regulations: Fast facts

Maximum ADU size

1,200 square feet for a new-construction detached ADU on a property with a single-family residence.

Maximum ADU height

For a new-construction detached ADU, 16 feet.

Side and rear setbacks

Each is 4 feet.

Note that additional setback requirements or other restrictions may apply depending on the zone and type of construction.

ADU news and events

Stay on top of trends and processes.

Article: New California ADU Laws Explained

Learn all about the regulation changes in 2020 and 2021.

Webinar: Building an ADU in California

Covering the new state laws, Villa’s building process, and the advantages of ADUS.

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