Accessory Structures in Rancho Cucamonga, CA (2026)
5 verified accessory structures rules for Rancho Cucamonga, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Rancho Cucamonga must permit ADUs and JADUs on residential parcels under CA Gov Code 65852.2. Up to 1,200 sq ft detached or 50 percent of primary for attached, no owner-occupancy required statewide.
Rancho Cucamonga ADU Rules
Few RestrictionsShed Rules
Rancho Cucamonga allows backyard sheds under 120 square feet without a building permit, but zoning setbacks, height limits, and foothill fire code restrictions still apply.
Rancho Cucamonga Shed Rules
Some RestrictionsGarage Conversions
Garage conversions to ADUs are protected under CA Gov Code 65852.2 and are streamlined in Rancho Cucamonga. Replacement parking is not required, but permits, egress, and insulation upgrades are mandatory.
Rancho Cucamonga Garage Conversions
Few RestrictionsCarport Rules
Carports in Rancho Cucamonga require a Building permit and must meet zoning setbacks. Foothill properties face additional Chapter 7A fire-resistant construction rules and HOA design review.
Rancho Cucamonga Carport Rules
Some RestrictionsTiny Homes
Tiny homes on foundations can qualify as ADUs or Junior ADUs in Rancho Cucamonga under state law. Tiny homes on wheels are regulated as RVs and cannot be used as permanent dwellings.
Rancho Cucamonga Tiny Home Rules
Some RestrictionsLooking for San Bernardino County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Rancho Cucamonga city rules.
Accessory Structures in San Bernardino County →