Additions to an existing building shall comply with the applicable requirements of state and local laws, rules, regulations, codes, and standards for new construction. Such additions shall not impose loads either vertical or horizontal which would cause the existing building to be subjected to stresses exceeding those permitted under new construction. If the existing building does not comply with the standards provided in this article and the authorized enforcement authority finds that the addition adversely affects the performance of the total building, the authorized enforcement authority may require:
OCGA § 8-2-214