Except when the procedures for an annexation provided for in Sections 5-3-100, 5-3-110, 5-3-120, 5-3-130, 5-3-140, and 5-3-150 are followed, the assessed value of real property of any single freeholder to be annexed, as defined in Section 5-3-240, shall not at the time of a proposed annexation exceed twenty-five percent of the assessed value of real property of the existing area of a municipality.
S.C. Code § 5-3-235