S.C. Code Ann. § 5-3-260: Annexation of church property.

Any area owned entirely by an established church or religious group which is contiguous to a municipality may be annexed to the municipality upon the petition of the governing body of the church or religious group being submitted to the governing body of a municipality. Upon agreement of the governing body of the municipality to accept the petition, and the passage of an ordinance to that effect, the annexation is complete.