Santa Maria, CA Accessory Structures: ADU Impact Fees (2026)

05(1)(k) sets Santa Maria's ADU impact fee structure in two parts. First, no development impact fees are required for an ADU under 750 square feet in floor area; the section defines "impact fee" for this purpose as a fee under the state Mitigation Fee Act, Government Code Section 66000(b), and a fee under the Quimby Act, Government Code Section 66477, expressly excluding any water or sewer connection fee or capacity charge from that waiver. Second, for an ADU at or above 750 square feet, any development impact fee that does apply must be charged proportionately to the square footage of the primary dwelling unit, with the exact amount set by the City's adopted fee resolutions and ordinances in effect when the fee is paid.

05(1)(j): ADUs and JADUs are not treated as new residential uses for calculating utility connection fees or capacity charges, and a unit built within an existing residence or existing accessory structure needs no new or separate utility connection or related fee at all. Only new attached and detached ADUs pay a connection fee or capacity charge, and even then it must be proportionate to the unit's burden on the water or sewer system, measured by square footage or drainage fixture unit values under the Plumbing Code.