Retaining Wall Permit Requirements in Smithville, TN
City of Smithville is the AHJ: listed EXEMPT on the TN State Fire Marshal residential jurisdictions list, meaning it enforces its own local building codes (not the state, not DeKalb County). Building and Zoning at City Hall, 104 E. Main St Ste 103, 615-597-4745 ext. 2. TN statewide residential minimum is the 2018 IRC (with 2018 IECC); the city does not publish its own specific adopted edition or a fee schedule online and directs fee questions to ext. 2. DeKalb County is separately exempt for unincorporated areas (inspector Lewis Bryant, 931-644-3935). County seat of DeKalb County.
By Joey, Founder · Last verified May 31, 2026 · How we research →
When you need a Retaining Wall permit
A retaining wall over 4 feet in height (measured from the bottom of the footing to the top of the wall) or any wall supporting a surcharge requires a building permit from the City of Smithville (City Hall, Building and Zoning) under the 2018 IRC; shorter freestanding walls generally do not. Provide drainage behind the wall and confirm thresholds with City Hall, 615-597-4745 ext. 2.
Retaining Wall Permit Costs: Smithville vs. Nearby
| City | Estimated Fee |
|---|---|
| Smithville | N/A |
| Nashville | $150 – $600 |
| Memphis | $150 – $600 |
| Knoxville | $150 – $600 |
Fees shown are estimates based on local building code data. Actual fees may vary based on project scope and valuation. See all Smithville permit costs →
Zoning Considerations
Retaining walls near property lines may require zoning setback review. Walls that significantly change the grade of a property may need additional zoning approval.
Estimated Project Timeline
Here's a typical timeline for a retaining wall project:
Timeline is based on the typical about 1 week permit processing time. Actual timelines vary by project complexity, completeness of application, and current department workload.
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Frequently Asked Questions
Contact the building department for current Retaining Wall permit fee information. Fees typically vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Retaining Wall projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for Retaining Wall permits is about 1 week. More complex projects may take longer if plan review is required.
Learn More About Retaining Wall Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Retaining Wall Guide →