ADU Impact Fees
Accessory Structures
Impact fees, school fees, utility hookup charges, and waivers for ADUs. Many jurisdictions exempt ADUs under 750 sq ft from impact fees per state law.
How ADU Impact Fees Rules Differ by Place
Alameda County, CA: ADU Impact Fee Waiver in Alameda County
Few RestrictionsUnincorporated Alameda County waives park dedication impact fees for accessory dwelling units under 750 sq ft, and never charges them for junior accessory dwelling units, under Chapter…
Camarillo, CA: Camarillo ADU Park Impact Fee Exemption
Few RestrictionsCamarillo exempts every accessory dwelling unit from the Park Impact Fee that new development otherwise pays under Municipal Code Chapter 16.52. The exemption applies automatically at…
Fremont, CA: ADU Impact Fee Exemption in Fremont
Few RestrictionsFremont exempts accessory dwelling units from development impact fees when the ADU is built as a remodel or addition that does not change the use of the property. The exemption sits in…
Antioch, CA: Antioch ADU Impact Fee Discounts
Some RestrictionsAntioch charges development impact fees on accessory dwelling units, but caps them below the standard per-unit rate. An ADU under 750 square feet pays no DIF at all, and larger units…
Brentwood, CA: Brentwood ADU Development Impact Fees
Some RestrictionsBrentwood charges development impact fees on accessory dwelling units through its adopted development fee program, but waives them for any ADU under 750 square feet and for junior ADUs…
Chico, CA: Chico ADU Impact Fee Discount
Some RestrictionsChico cuts development impact fees in half for an ADU that shares its sewer lateral with the main house, under Chico Municipal Code § 3.85.135.
Cities & Counties with ADU Impact Fees Rules
102 locations
California
Other Accessory Structures Topics
ADU Rules
Rules for building accessory dwelling units (granny flats, in-law suites) including size limits, parking requirements, and owner-occupancy rules.
ADU Owner Occupancy
Whether the property owner must live on-site to operate an ADU, deed-restriction requirements, and recent state-law changes lifting owner-occupancy rules.
ADU Rental Restrictions
Whether an ADU can be rented short-term (Airbnb), 30-day minimums, separate rental licenses, and long-term lease requirements.
Shed & Carport Rules
When a storage shed or carport needs a permit, the square-footage exemption thresholds, and the setback and height limits that apply either way.
Garage Conversions
Rules for converting a garage into living space, including whether you need to replace the lost parking and what building codes apply.
Tiny Homes
Zoning rules for tiny houses on wheels and foundations, including minimum square footage requirements and where they can be placed.