Anaheim, CA Accessory Structures: ADU Impact Fees (2026)

240, part of the Quimby Act park-dedication chapter, sets population density figures used to calculate subdivision park fees and then carves out accessory dwelling units from that fee structure. The code states that under Government Code Section 66324, ADUs are exempt from impact fees imposed by local agencies, special districts and water corporations whenever the unit is smaller than 750 square feet. 290. Once an ADU reaches 750 square feet or larger, the exemption ends and the code requires the fee to be charged proportionately, meaning the City calculates it based on the ratio of the ADU's square footage to the square footage of the primary dwelling unit on the same lot, rather than billing the ADU at the same per-unit rate as the main house.

3302 for a mobile home unit. Anaheim last amended both sections by Ordinance 6625 on April 21, 2026, carrying forward a chain of amendments dating to Ordinance 3568 in 1976. Because the exemption is keyed to the statewide 750-square-foot threshold in Government Code Section 66324, a homeowner building a smaller ADU pays no park or water-agency impact fee at all, while an owner of a larger, full-size ADU should expect a bill calculated as a fraction of what the primary house's fee would be.