N.C. Gen. Stat. § 54C-131

A savings bank may invest in real property and equipment and in leasehold improvements to rented facilities necessary for the conduct of its business and in real property to be held for its future use. A savings bank may invest in office buildings and appurtenances for the purpose of the transaction of the savings bank's business. This investment may not be made without the prior written approval of the Commissioner of Banks if the total amount of these investments exceeds fifty percent (50%) of the savings bank's net worth. Facilities, furniture, and fixtures leased for the purpose set forth in this section are not included in this limitation.