LA County ADU facts.

ADU or Accessory Dwelling Units

Los Angeles County has updated its accessory dwelling unit regulations to comply with state laws that took effect on January 1, 2017. The ADU Ordinance was adopted on April 30, 2019 and took effect on May 30, 2019.

Need more living space for your family?

Need more living space for your family? Want to earn rental income? You can build an accessory dwelling unit on the residential or agriculturally zoned property that you own.

What is an ADU?

An ADU is a dwelling unit with a full kitchen and bathroom, which is an accessory use to a primary or main single family residence. The ADU can be used as a rental, but cannot be sold separately from the primary or main single family residence. The existing residence must be a legally established structure.

How to apply for an ADU 

An Accessory Dwelling Unit shall be permitted with a site plan. For more information please follow this link.

Please note that the County’s ordinance only applies in the unincorporated areas of Los Angeles County and zoning of the property is R-A, R-1, R-2, R-3, R-4, A-1 or A-2.