Retaining Walls: Glendale vs Mesa
How do retaining walls rules compare between Glendale, AZ and Mesa, AZ?
Glendale and Mesa have similar restriction levels.
Glendale, AZ
Maricopa County
Glendale requires building permits for retaining walls over 4 feet in height (measured from the bottom of the footing to the top of the wall). Retaining walls over 4 feet must be designed by a licensed engineer. Combined height of a retaining wall and fence on top is subject to overall height limits. The Unified Development Code and International Building Code govern retaining wall construction.
View full Glendale rules →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 →Key Facts Comparison
| Fact | Glendale | Mesa |
|---|---|---|
| Permit Threshold | Over 4 ft requires building permit | - |
| Engineering Required | Walls over 4 ft need licensed engineer design | For walls over 4 feet |
| Combined Height | Retaining wall + fence measured together for zoning limits | - |
| Drainage | Must not redirect stormwater to neighbors | - |
| Soils | Expansive desert soils require proper footing design | - |
| Contact | Development Services (623) 930-2580 | - |
| Permit Trigger | - | Over 4 feet high |
| Fence Combo | - | Cumulative height applies |
| Code Reference | - | Title 4, Building Regulations |
Highlighted rows indicate differences between cities.
Glendale FAQ
Do I need a permit for a retaining wall in Glendale?
Retaining walls over 4 feet (measured from footing to top) require a building permit and engineered plans. Walls 4 feet or less are generally permit-exempt.
Can I put a fence on top of a retaining wall?
Yes, but the combined height of the retaining wall and fence counts toward zoning height limits for your district.
What about drainage concerns?
Retaining walls must not redirect stormwater onto neighboring properties. The city may require a drainage plan for larger retaining wall projects.
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.
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