Accessory Structures in Folsom, CA (2026)
5 verified accessory structures rules for Folsom, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Folsom must allow ADUs on all residential lots under CA Gov Code §65852.2. Ministerial approval within 60 days for ADUs up to 800 sq ft with 4-foot setbacks, no owner-occupancy requirement, and no parking within 1/2 mile of transit. Folsom has adopted an ADU ordinance with local standards that cannot fall below state minimums.
Accessory Structures: Adu Rules
Few RestrictionsShed Rules
Folsom exempts detached sheds and storage buildings under 120 sq ft from building permit requirements, though zoning setbacks and maximum height still apply. Sheds 3 feet from property lines are typical. Electrical and plumbing connections trigger permits regardless of shed size.
Accessory Structures: Shed Rules
Few RestrictionsGarage Conversions
Garage conversions to ADUs are streamlined under CA Gov Code §65852.2 — Folsom cannot require replacement parking for converted garages and must approve ministerially. Conversion to non-ADU habitable space (family room, bedroom) requires standard building permit and may trigger parking replacement requirements.
Accessory Structures: Garage Conversions
Few RestrictionsCarport Rules
Carports in Folsom require a building permit when attached or over 120 sq ft and must meet zoning setbacks. Front yard carports are typically prohibited; side and rear are allowed subject to setback and height standards. Fabric/canopy carports are regulated as temporary structures and may face HOA restrictions.
Accessory Structures: Carport Rules
Some RestrictionsTiny Homes
Tiny homes on foundations in Folsom are regulated as ADUs or primary dwellings under state ADU law. Tiny Homes On Wheels (THOWs) are generally classified as recreational vehicles and cannot be used as permanent dwellings in residential zones. Movable Tiny Houses meeting ANSI 119.5 may qualify as ADUs under AB 68 amendments.
Accessory Structures: Tiny Homes
Some RestrictionsLooking for Sacramento County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Folsom city rules.
Accessory Structures in Sacramento County →