Both building permit fees and development impact fees (DIF) may be required for an Accessory Dwelling Unit (ADU).
You can obtain a preliminary cost estimate for all fees by visiting the ADU Calculator.
Please note: No DIF required if the ADU is less than 750 square feet. If ADU 750 square feet or greater, then fee amount is based on the proportionality to the main residence.
Example: If the ADU size is 50% of the main residence, then we will collect 50% of the DIF in effect at the time the permit is issued.
The DIF must be paid prior to the building permit final or issuance of the Certificate of Occupancy. The City Planner will verify that DIF was paid, and is responsible for coordinating with Building and Safety staff to ensure DIF is paid prior to building permit final or issuance of Certificate of Occupancy. Conversely, Building and Safety staff will confirm with the Planning staff that the DIF was paid before building permit final or issuance of Certificate of Occupancy.
For more information related to ADU's, visit the City's ADU Information Page.