Mebane, NC Fence Regulations: Retaining Walls (2026)

Mebane UDO § 12-4 defines a Retaining Wall as 'a structure, either masonry, metal, or treated wood, designed to prevent the lateral displacement of soil, rock, fill or other similar material.' Under § 4-3(C), the Supplementary Dimensional Requirements article lists retaining walls, alongside fences, mailboxes, flagpoles, and HVAC equipment, among the features that 'are permitted in required setbacks provided there is no interference with any sight area,' so a homeowner can build a retaining wall inside a front, side, or rear setback without a variance as long as it does not block visibility at a driveway or intersection.

That general allowance changes once the wall sits inside a Special Flood Hazard Area. Mebane UDO § 5-6.7(C)(10)(b) singles out retaining walls, sidewalks, and driveways in regulated floodways and non-encroachment areas (NEAs), providing that any retaining wall that places fill inside a regulated floodway or NEA must meet the limitations of § 5-6.7(E). That section bars encroachments, including fill for a wall footing, unless a registered professional engineer certifies through hydrologic and hydraulic analysis that the wall will not raise base flood levels, submitted to the Zoning Administrator before a permit is issued, or unless FEMA has approved a Conditional Letter of Map Revision for the project.

Outside the floodway, the Ordinance's fence height table in § 4-3(D) does not separately cap retaining wall height, so a wall's size is instead controlled through the ordinary zoning permit review the Planning and Zoning Department conducts for setback and sight-area compliance. Violations of either standard are enforced the same way as any other UDO violation, under Article 11's civil penalty and permit revocation provisions.