ADUCheckby ViviendaCheck a propertyCheck
Los Angeles County

ADU rules in Los Angeles County

What state law allows on any property in Los Angeles County, and which cities ADUCheck covers in full. Updated November 6, 2026.

Full reports cover the City of Los Angeles and unincorporated LA County, with more cities each month. Enter an address to see which rules apply to it.

What state law allows anywhere in Los Angeles County

Every city must allow at least this much. A city can allow more, never less. State rules current to November 6, 2026.

  • Detached ADU

    Up to 1,200 sq ft. At least 800 sq ft is always allowed.

  • Height

    16 ft; 18 ft within half a mile of transit, plus 2 ft for a roof that matches the home.

  • Setbacks

    4 ft from the side and back of the property.

  • Parking

    None needed within half a mile of transit, or for a conversion.

  • Fees

    No impact fees up to 750 sq ft. No school fees up to 500 sq ft.

  • Timeline

    The city must decide within 60 days of a complete application.

Cities in Los Angeles County

Full reports in Los Angeles. 88 cities get the state rules today.