[Amended 11-9-1998 by L.L. No. 5-1998; 10-24-2005 by L.L. No. 11-2005]
All buildings, other than buildings being used as detached one-family dwellings, shall have side yards of at least 15 feet. Notwithstanding the foregoing, the side yards of any legal preexisting nonconforming building in excess of 31 feet in height shall not be reduced to less than 20 feet.