S.C. Code Ann. § 6-29-960

When the regulations made under authority of this chapter require a greater width or size of yards, courts, or other open spaces, or require a lower height of building or smaller number of stories, or require a greater percentage of lot to be left unoccupied, or impose other more restrictive standards than are required in or under another statute, or local ordinance or regulation, the regulations made under authority of this chapter govern. When the provisions of another statute require more restrictive standards than are required by the regulations made under authority of this chapter, the provisions of that statute govern.