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Knoxville, TN Fence Regulations: Retaining Walls (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Easement walls
Owner's risk, Engineering approval required
Commercial site plans
Stamped retaining wall calculations required
Height cap
No separate zoning height limit
Citation
Appendix B § 10.1.E

Summary

Knoxville permits retaining walls within utility and drainage easements only at the owner's risk and with City Department of Engineering approval; commercial site plans must also submit stamped wall calculations.

E. Utility and Drainage Easements. Permanent structures and accessory structures are prohibited within utility and drainage easements. Stormwater facilities, retaining walls, and fences may be installed at the property owner's risk, subject to the approval of the City Department of Engineering.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 80).

Full Breakdown

Knoxville's zoning code treats utility and drainage easements as largely off-limits to construction: permanent and accessory structures are barred outright. Retaining walls get a narrow carve-out, they, along with stormwater facilities and fences, are permitted in an easement only at the property owner's risk and only with sign-off from the City of Knoxville Department of Engineering. Outside easements, retaining walls still trigger standard site-plan review; commercial site development plans submitted to the Engineering Department must include stamped retaining wall calculations, and residential landscape plans must show wall elevations. There is no separate citywide retaining-wall height cap in the zoning code itself.

Violations & Fines

Building a retaining wall in a utility or drainage easement without Engineering Department sign-off is a zoning violation; the City can require removal, and the owner bears all risk and cost for any resulting damage.

Frequently Asked Questions

Does Knoxville require a permit for a retaining wall?
Not a standalone zoning permit for most walls, but any wall inside a utility or drainage easement needs City Department of Engineering approval, and commercial site plans must submit stamped wall calculations.
Is there a maximum retaining wall height in Knoxville's zoning code?
Appendix B doesn't set a citywide zoning height cap for retaining walls; construction still has to meet separate Building Code structural requirements.

Sources & Official References

Other rules in Knoxville

Parking Rules: Overnight ParkingSome RestrictionsParking Rules: Street Parking LimitsSome RestrictionsHeight LimitsSome RestrictionsFence Permit RequirementsSome RestrictionsMaterial RestrictionsSignificant RestrictionsNoise Ordinances: Leaf Blower RulesLight RestrictionsParking Rules: Towing & Impound RightsSignificant RestrictionsParking Rules: Curb Color RulesSome RestrictionsParking Rules: Commercial & Oversized VehiclesSome Restrictions

All Knoxville rules

Compare Knoxville to another location·View the Tennessee fence regulations overview

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