A building greater than 6,500 square feet of gross floor area existing prior to the adoption of these regulations shall be allowed to increase its gross floor area by no greater than 10%, provided that:
The existing building footprint is not increased and, if the existing part of the building to be increased in gross floor area is within the required or preexisting setback, the setback nonconformance shall not be increased; and
A building greater than 6,500 square feet of gross floor area existing prior to the adoption of these regulations shall be allowed to increase its gross floor area by no greater than 10%, provided that:
The existing building footprint is not increased and, if the existing part of the building to be increased in gross floor area is within the required or preexisting setback, the setback nonconformance shall not be increased; and