Retaining Walls: Mesa vs Scottsdale
How do retaining walls rules compare between Mesa, AZ and Scottsdale, AZ?
Mesa has fewer restrictions than Scottsdale.
Mesa, AZ
Maricopa County
Mesa requires building permits for retaining walls over 4 feet in height including the surcharge. Retaining walls combined with fences on top have cumulative height calculations under the building code.
View full Mesa rules →Scottsdale, AZ
Maricopa County
Scottsdale requires building permits for retaining walls over 4 feet in height (measured from bottom of footing to top of wall). In the ESLO overlay, retaining walls are subject to additional design standards to protect the natural desert environment. All retaining walls must be designed to handle the specific soil and drainage conditions of the Sonoran Desert.
View full Scottsdale rules →Key Facts Comparison
| Fact | Mesa | Scottsdale |
|---|---|---|
| Permit Trigger | Over 4 feet high | - |
| Engineering Required | For walls over 4 feet | - |
| Fence Combo | Cumulative height applies | - |
| Code Reference | Title 4, Building Regulations | - |
| Permit Threshold | - | Required for walls over 4 feet total height |
| Surcharge | - | Permit required regardless of height if supporting loads |
| Engineering Plans | - | Licensed AZ engineer required for permitted walls |
| ESLO Requirements | - | Earth-tone colors, natural materials, desert compatibility |
| Soil Considerations | - | Caliche and expansive clay require special design |
| Drainage | - | Must address hydrostatic pressure behind wall |
Highlighted rows indicate differences between cities.
Mesa FAQ
Do I need a permit for a retaining wall in Mesa?
Yes, if the retaining wall exceeds 4 feet in height including surcharge. Engineered plans are required for the permit application.
Can I put a fence on top of a retaining wall in Mesa?
Yes, but the combined height of the retaining wall and fence is regulated. Check with Mesa Development Services for the maximum allowed height in your zoning district.
Scottsdale FAQ
Do I need a permit for a retaining wall in Scottsdale?
Yes, if the wall exceeds 4 feet in total height from footing to top. Walls supporting a surcharge (driveway, structure, slope) require a permit regardless of height.
Do I need an engineer for a retaining wall?
Yes. Permitted retaining walls require engineering plans stamped by a licensed Arizona structural or civil engineer.
Are there special retaining wall rules in Scottsdale hillside areas?
Yes. In ESLO areas, retaining walls must use earth-tone colors and natural materials where feasible to blend with the desert landscape.
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