Costa Mesa regulates carports through Title 13 (Zoning) of the Costa Mesa Municipal Code and Title 5, which adopts the 2022 California Building and Residential Codes. A carport is a structure that requires a building permit, must meet the setbacks of the underlying zone, and counts toward required covered parking for single-family homes.
Costa Mesa Municipal Code Title 13 sets development standards including setbacks, height, and lot coverage for accessory structures and parking by zone (R1, R2, etc.). A carport is a roofed structure with at least one open side; under the 2022 California Residential Code (adopted in CMMC Title 5), any carport beyond a small fabric or temporary cover requires a building permit because it has structural roof framing and posts. CRC Section R105.2 exempts only one-story detached accessory structures used as tool/storage sheds 120 square feet or less, which does not cover carports. A single-family home in Costa Mesa is generally required to provide two covered parking spaces, and a carport may satisfy that requirement when sized and located per the zone. Front-yard setbacks generally restrict carports to behind the front building line; an attached carport must meet the side-yard setback of the main dwelling. Confirm zone-specific dimensions with the Costa Mesa Planning Division.
Building a carport without a building permit, encroaching into a required setback, or removing the open-side requirement to convert it into an enclosed garage without a permit are violations enforceable by Costa Mesa Code Enforcement and can require removal or after-the-fact permits.
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Side-by-side rule comparisons with other cities in Orange County.
See how other cities in Orange County handle carport rules.
See how Costa Mesa's carport rules rules stack up against other locations.
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