Rock Hill, SC Fence Regulations: Retaining Walls (2026)

Rock Hill's retaining wall rule sits inside the same general building-permit exemption list as the city's fence exemption. City Code § 10-74, Work Exempt from Permit, exempts a retaining wall from the building permit requirement only if it is four feet (1,219 mm) or less, measured from the bottom of the footing to the top of the wall, and only if the wall does not support a surcharge or impound Class I, II or III-A liquids. A wall over that four-foot threshold, or a shorter wall carrying a surcharge load or holding back a flammable or combustible liquid, falls outside the exemption and needs a building permit, which typically means engineered plans given the loads involved.

6(A)(8), Maximum Height, if a fence sits on top of a retaining wall, a four-foot minimum-height safety fence is allowed on top of the wall and its height is not added to the wall's own height, so a property owner can add a safety fence to a retaining wall without pushing the combined structure over the district's fence-height limit. The permit-exemption threshold and the fence-on-wall allowance come from different instruments: § 10-74 is part of the 2014-codified general Code of Ordinances, while the fence provision comes from the Zoning Ordinance's June 22, 2026 update, so a homeowner in Rock Hill, York County, South Carolina, planning a retaining wall over four feet should confirm current engineering and permit requirements with the city's Building Standards Division.