S.C. Code Ann. § 39-14-30
(B) A local governing body may enact or amend an ordinance of general applicability to require the removal of any nonconforming, lawfully erected off-premises outdoor advertising sign only if the ordinance requires the payment of just compensation to the sign owners, except as provided in this subsection. The payment of just compensation is not required if the:
(D) If a local governing body requires removal of an off-premises outdoor advertising sign, the local governing body may enter into an agreement with the owner of a nonconforming off-premises outdoor advertising sign to relocate and reconstruct the sign. The relocated sign must comply with the provisions of Title 57. The agreement must include provisions for:
(1) relocation of the sign to a site reasonably comparable to or better than the existing location. In determining whether a location is comparable or better, the following factors must be taken into consideration, the:
(2) payment by the local governing body of the reasonable costs of relocating and reconstructing the sign including: