S.C. Code Ann. § 29-3-70

A bank, savings and loan association, financial institution, mortgage company, or any public or private mortgagee doing business in this State, when making a mortgage loan, may not require, as a condition or term of the mortgage, that the mortgagor purchase casualty insurance on property which is the subject of the mortgage in an amount in excess of the replacement cost of the buildings or appurtenances on the mortgaged premises.