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🧱 Retaining Wall permit checklist

A wall holding back soil where grade changes — height triggers engineering and permit thresholds. Print this sheet and take it to your building department.

Typical requirement. Across 50 states we reviewed, about 100% require a permit for retaining wall (verdict: conditional; typical go / no-go: allowed). Common exemption: Walls ≤4 ft above grade and not supporting a surcharge are exempt under IRC R105.2. Your city or county sets the exact rule — confirm with the permit checker.

For your specific project, use the permit checker, then open your county permit portal to start the application.

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