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…
Alameda, CA: Alameda ADU Impact Fee Exemptions
Few RestrictionsAlameda exempts accessory dwelling units from its Improvement Tax under AMC Section 3-62 and bars treating an ADU as a new residential use for water or sewer connection fees and…
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…
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…
Baldwin Park, CA: ADU Park Fee Reduction in Baldwin Park
Some RestrictionsBaldwin Park cuts its park land-dedication in-lieu fee in half for a second dwelling unit added to a single-family lot, and adds a further 50% surcharge only if a third unit is later…
Bellflower, CA: Bellflower ADU Impact Fees
Some RestrictionsBellflower charges ADU development impact fees scaled to the primary home's square footage, plus a separate utility connection or capacity charge, subject to state ADU fee exemptions.
Cities & Counties with ADU Impact Fees Rules
194 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.