Rancho Cucamonga, CA Accessory Structures: Shed Rules (2026)

Rancho Cucamonga follows the California Residential Code exemption allowing one-story detached accessory buildings used as sheds, tool storage, or playhouses up to 120 square feet to be built without a building permit, provided they do not include plumbing, electrical wiring, mechanical equipment, or HVAC. Sheds over 120 square feet require a full Building permit and Planning zoning review. All sheds regardless of size must comply with Rancho Cucamonga Development Code zoning rules, which typically require a 5-foot setback from rear and side property lines in single-family zones, 5 feet of separation from the main house, and a maximum height of 15 feet or lower depending on zone. Hillside and VHFHSZ properties have additional fire code requirements, including non-combustible or ignition-resistant materials within defensible space zones and minimum clearances from structures. HOAs in Terra Vista, Victoria Gardens, Rancho Etiwanda, and the foothill communities typically add material, color, and placement restrictions through CC and R review. Even permit-exempt sheds must meet the maximum rear yard accessory coverage (often 30 percent of the rear yard). Electrical run to a shed requires a separate electrical permit. Sheds cannot be used as dwelling units; a converted shed for habitation triggers ADU regulations.