S.C. Code Ann. § 6-7-1100
From and after the time when the platting jurisdiction of the local planning commission shall have attached by virtue of adoption by the planning commission of a major street plan and the adoption by the governing authority of land subdivision regulations recommended to them by the planning commission, as provided in this chapter, no building permit shall be issued for and no building or other structure shall be erected on any lot unless the street giving access to the lot upon which the building is proposed to be placed (a) shall have been accepted or opened as, or shall have otherwise received the legal status of, a public street prior to that time; or (b) unless such street corresponds in its locations and lines with a street shown on a subdivision plat approved by the planning commission or on an official map made and adopted by the planning commission and the governing authority or with a street located and accepted by the governing authority of the municipality or the governing authority of the county. Any building erected in violation of this section shall be deemed an unlawful structure, and the building official or municipal or county attorney or other official designated by the governing authority of the municipality or the governing authority of the county may bring appropriate action to enjoin such erection or cause it to be vacated or removed.