Peoria requires building permits for retaining walls over 4 feet. Walls exceeding 4 feet must be designed by a licensed engineer. Combined height of retaining wall and fence counts toward zoning limits. Walls must not redirect drainage. Desert soils in northwest Valley require proper footing design.
Retaining walls in Peoria follow the building code. Walls over 4 feet (footing to top) need a building permit and engineered plans. Walls 4 feet or less are generally permit-exempt. Combined height of wall and fence on top counts toward zoning limits. Drainage must be properly managed. Desert soils in Peoria's northwest Valley location include expansive clays requiring proper footing design. Development Services handles retaining wall permits.
Walls over 4 feet without permits or engineering face stop-work orders, fines, and remediation.
Peoria, AZ
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