Accessory Structures in Petaluma, CA (2026)
4 verified accessory structures rules for Petaluma, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Petaluma IZO §7.030 implements California's permissive ADU laws (Gov Code §65852.2). Most single-family lots may build at least one ADU and one Junior ADU.
Petaluma Accessory Dwelling Units (ADUs)
Few RestrictionsShed Rules
Sheds in Petaluma must meet zoning setback rules for accessory structures. Under the California Building Code, a building permit is generally required for sheds over 120 square feet; smaller sheds still must meet placement rules.
Accessory Structures: Shed Rules
Some RestrictionsGarage Conversions
Under California Gov Code §65852.2(e), Petaluma must approve conversion of an existing garage to an ADU and may not require replacement parking even if the conversion eliminates required parking.
Petaluma Garage Conversion to ADU
Few RestrictionsLooking for Sonoma County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Petaluma city rules.
Accessory Structures in Sonoma County →