Retaining wall permit checklist — Phoenix, Arizona
Assembled from Phoenix’s own published permit rules. Every line below is quoted from a city document and linked to it. Nothing here is generated, estimated, or inferred from another jurisdiction.
Do you need a permit?
Phoenix requires a permit for a retaining wall.
A retaining wall in Phoenix is permit-free at 40 inches and under, sized from the footing top up to the wall's highest point. Adding load behind the wall, or impounding liquids of Class I, II or IIIA, puts it back under the permit requirement.
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Sources
- retaining wall — permit rules ↗verified August 2026
Other permits Phoenix publishes rules for
Listed because the city publishes a separate rule for each type — not because this project necessarily triggers one. Whether it does depends on your scope of work.
- Deck permit checklist
- Fence permit checklist
- Shed permit checklist
- Water heater permit checklist
- Re-roof permit checklist
- Electrical work permit checklist
- General building work permit checklist
BuildSpec is a reference, not the authority having jurisdiction. Confirm requirements with Phoenix before you build.