Sheds and accessory structures in Rancho Santa Margarita

Each rule below links to the section of the Rancho Santa Margarita Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Rancho Santa Margarita's code says

Rancho Santa Margarita code What Rancho Santa Margarita's code adds
Maximum height	No taller than the main building on the site. Applies: Detached accessory structures, except as allowed for accessory dwelling units. § 9.04.020 · code text The structure shall not exceed the height of the principal structure on the building site, except as may otherwise be permitted under Section 9.04.190 (accessory dwelling units). If under 5 feet tall, they may extend into the rear and side setbacks. Applies: Detached fireplaces, barbecues, fire pits, landscape structures and similar structures. § 9.04.020 · code text Detached fireplaces, barbecues, fire pits, landscape structures and other similar structures, with a height less than five feet, shall be permitted to encroach into the rear and side setback areas unless the adopted Uniform Building Code regulations require a more restrictive setback. No more than 8 feet tall. Applies: Detached fireplaces, barbecues, fire pits, landscape structures and similar, unless approved through the alternative development standard process. § 9.04.020 · code text No detached fireplace, barbecue, fire pit, landscape structure or other similar structures shall exceed eight feet in height unless approved through the alternative development standard process described in Section 9.08.050.
Size or lot coverage	No more than 60% of the length of the main building wall it is attached to. Applies: Decks, porches and balconies over 6 feet high, measured from finished grade. § 9.04.020 · code text Decks, porches and balconies over six feet in height measured from finished grade shall not exceed 60 percent of the total length of the principal building elevation to which it is attached and shall maintain all building setbacks of the principal structure.
Side and rear setback	Set back from the rear and side property lines at least as far as the structure is tall. Applies: Detached accessory structures under 450 square feet of gross floor area. § 9.04.020 · code text If less than 450 square feet in gross floor area, the structure shall be located a minimum distance from the parcel's rear and side property line equal to the height of the structure. They must meet the zoning district's minimum side and rear setbacks. Applies: Detached fireplaces, barbecues, fire pits, landscape and similar structures 5 feet or taller, or 450 square feet or more. § 9.04.020 · code text If such structures are five feet or greater in height or if the structure is 450 square feet or more in gross floor area, they shall maintain the minimum side and rear yard setback for the zoning district. At least 3 feet from the rear property line. Applies: Open patio covers in the required rear yard. § 9.04.020 · code text An open patio cover may be erected within the required rear yard to a minimum of three feet from the rear property line.
Distance from the house	At least 5 feet from the main building. Applies: Detached accessory structures. § 9.04.020 · code text The structure shall maintain a minimum separation of five feet between the detached accessory structure and the main building.

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How big can a shed or accessory building be in Rancho Santa Margarita?

Detached accessory structures may be no taller than the main building; fireplaces, barbecues and fire pits are limited to 8 feet unless approved otherwise.

Sheds, garages and other accessory structures in Rancho Santa Margarita

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