Tuscaloosa, AL Fence Regulations: Retaining Walls (2026)

Tuscaloosa addresses retaining walls in two places. First, the Zoning Ordinance's fence/wall height section (Sec. 25-149(c)) provides that a retaining wall may exceed the maximum fence and wall heights otherwise allowed (4-10 feet depending on district and yard) if the Director of Planning determines it does not unreasonably impede visibility of street traffic and visibility from vehicles exiting driveways. Like all fences and walls, retaining walls must also comply with the location standards of Sec. 25-148, including the prohibition on obstructing the Sight Triangle, the bar on placing structures in the street right-of-way, the 10-foot setback from the curb line, and the rule that a structure may not block or divert natural drainage onto neighboring land. Second, the City's official 'Do I Need a Permit?' guidance sets a permit threshold by height: retaining walls less than 4 feet tall do not require a permit, while retaining walls greater than 4 feet tall do require a permit. Detailed structural design and drainage requirements for taller walls are governed by the building code administered by the Office of the City Engineer rather than spelled out in the zoning text.