S.C. Code Ann. § 6-29-1110
As used in this article:
(2) "Subdivision" means all divisions of a tract or parcel of land into two or more lots, building sites, or other divisions for the purpose, whether immediate or future, of sale, lease, or building development, and includes all division of land involving a new street or change in existing streets, and includes re-subdivision which would involve the further division or relocation of lot lines of any lot or lots within a subdivision previously made and approved or recorded according to law; or, the alteration of any streets or the establishment of any new streets within any subdivision previously made and approved or recorded according to law, and includes combinations of lots of record; however, the following exceptions are included within this definition only for the purpose of requiring that the local planning agency be informed and have a record of the subdivisions: