Corona, CA Accessory Structures: Shed & Carport Rules (2026)

Corona Code of Ordinances § 17.66.010 governs every detached garage, shed, workshop or other accessory building placed on residential property. No accessory building can go up in an R zone unless the lot already carries a permissive primary dwelling unit. Once that unit exists, a detached accessory building must sit at least five feet from the primary unit, and two accessory buildings on the same lot must be separated from each other by five feet as well. Placement in the front half of the lot is allowed only if the accessory building matches the primary unit's architecture and meets every other applicable setback; a structure with a different architectural style has to go behind the primary unit instead. The city exempts two categories from these placement standards entirely: detached accessory buildings under six feet tall sitting in the rear yard, and any detached accessory building under 120 square feet, regardless of height.

Side and rear setbacks from the property line depend on construction: a shed without fire-resistive walls needs four feet of clearance from a side or rear lot line, while one built with fire-resistive walls can come as close as two feet, provided any strip three feet or narrower is poured with at least two inches of concrete and graded to drain properly. Garages with alley access can't sit closer than 25 feet from the alley's far property line, and no accessory building may occupy the street-side yard of a corner lot or, on a reversed corner lot, sit closer to the street than the key lot's building line.

Separately, Corona's amended building code (§ 15.02.090, amending Section 105.2) exempts one-story detached tool sheds, storage sheds and playhouses up to 120 square feet from needing a building permit at all, unless the shed sits within 50 feet of another building, which triggers the wildland-urban interface standards in Chapter 15.25.