Retaining walls up to 4 ft in Pasadena require a zoning permit. Taller retaining walls require a building permit and engineering. Hillside areas have additional design standards to blend structures into terrain per PMC Title 14 and Title 17.
Pasadena regulates retaining walls to ensure structural safety and proper drainage. Walls up to 4 feet typically do not require a permit. Walls over 4 feet require a building permit and may need engineered plans stamped by a licensed professional engineer. Surcharge loads from driveways, structures, or slopes above the wall may lower the permit-free threshold. Drainage behind the wall is critical and must be addressed in design. Setback requirements apply to retaining walls near property lines.
Unpermitted walls: stop-work order, required engineering review, potential demolition. Fines $200 to $1,000.
Pasadena, CA
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Pasadena, CA
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Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle retaining walls.
See how Pasadena's retaining walls rules stack up against other locations.
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