S.C. Code § 30-5-130
Mortgages of leaseholds or other interests in real estate within the State and mortgages of dwellings or structures thereon, whether in one instrument or in separate instruments, shall be deemed to be mortgages of real estate and shall be recorded in the same manner as mortgages of real estate. The notice of such record shall be the same as the notice of the record of real estate mortgages and to the same extent. And the notice of the record of all mortgages of leaseholds or other interests in real estate in the State and of dwellings and structures thereon which have heretofore been recorded in the same manner as real estate mortgages shall be the same notice as given by the record of real estate mortgages and to the same extent.
S.C. Code § 30-5-130