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Accessory Dwelling Units

Allowable ADU Size and Special Districts

APN Number is used to find the Allowable Adu Gross floor area for your Property
For address lookup, please use the full address format, i.e., “701 Ocean St” as opposed to “701 Ocean”.
Do not use a period after abbreviations.
For APN lookup, do not use dashes.
Please be patient, it takes a moment to generate your report.
 

* Information in this tool is based on the County’s Geographic Information Systems data. Allowable ADU size is maximum based on the County Code (gross site area) and does not take into account size and footprint of existing structures, or any other physical constraints of your parcel that can affect the allowable size of new structures (net site area). For properties encumbered by rights-of-way or coastal bluffs and beaches, please consult with Planning Department staff to determine maximum allowable ADU size. This tool also does not take into account the current use of the parcel; ADUs are only allowed on parcels with single family homes. This tool does not replace or supersede confirmation of your development envelope with the County Planning Department.

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