Retaining walls in Santa Ana not over four feet in height measured from the bottom of the footing to the top of the wall are exempt from building permits under California Building Code provisions adopted by the city. Taller retaining walls require engineering plans and a building permit.
Under Santa Ana building code provisions consistent with the California Building Code, retaining walls not exceeding four feet in height from the bottom of the footing to the top of the wall are exempt from permit requirements, unless they support a surcharge or impound flammable liquids. Retaining walls exceeding four feet require a building permit with structural engineering calculations stamped by a licensed engineer. Retaining walls within required setback areas must comply with SAMC Chapter 41 zoning requirements. Walls that also function as fences must meet the combined height requirements applicable to the zoning district.
Unpermitted retaining walls exceeding four feet are subject to code enforcement action including stop-work orders, fines, and potential required removal or retrofitting with proper engineering.
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Side-by-side rule comparisons with other cities in Orange County.
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