Accessory Dwelling Units (ADUs)How to Obtain a Building Permit
Obtaining a Building Permit
Accessory Dwelling Unit (ADU), Granny Flat, In-Law Quarters, or any residence that is in addition to an existing residence on a parcel is an ADU. General requirements are the same as the construction of a primary residence with only a few exceptions.
Maximum square footage of living space is dependent on lot size. A garage may be attached to the dwelling and not considered part of the maximum square footage of living space. If the ADU is attached to the primary dwelling, the ADU may not exceed 50% of the primary dwelling's square footage. If a manufactured home is used as a second dwelling, please go to our
manufactured home page for additional requirements.
ADU Plan Review Guidelines
Building Services will not accept an Application for a Residential Building Permit unless the Minimum Criteria listed below are met. Use the following as a guideline for your submittal.
Submit two complete sets of plans that include the following, PLUS one additional floor plan:
Please note: one additional floor plan is needed for the county Assessor's Office before permit issuance.
An application missing any items will be deemed incomplete and will not be accepted until all needed items are provided. This may affect application fees and codes since the operative date of application will be the date on which a complete application is received.
CHECK OUR PLAN REVIEW GUIDELINES FOR MORE DETAILS ON THE PLAN CHECK PROCESS. The guideline, while not all-inclusive, is intended to help you prepare residential plans that are essentially "complete".