S.C. Code § 5-27-520
A municipality may construct or authorize the construction of motor vehicle parking facilities which encroach upon or project over a public sidewalk in the shopping districts of such municipality. Any such encroachment or projection shall be, in the opinion of the municipality's governing body, of a sufficient height above the sidewalk so as not to impede or interfere with normal pedestrian or vehicular movement. No such parking facility shall be allowed to encroach upon or project over any street within the State highway system or which has been constructed or improved with Federal aid funds, but this provision shall not apply to any such parking facility constructed or in the process of construction on May 23, 1961. The encroachment or projection of any such parking facility shall be removable and shall be removed, without compensation, upon reasonable notice given by the governing body of the municipality that the area subject to encroachment or projection is needed for street-widening purposes or that the encroachment or projection interferes with normal pedestrian or vehicular movement.
S.C. Code § 5-27-520