Nonconforming buildings or structures. Any nonconforming building or structure lawfully existing on the effective date of the original Building Zone Ordinance on February 23, 1926, or lawfully existing at any time thereafter, but which does not conform to the requirements of this Code adopted or amended thereafter and currently in effect, may be continued. No such nonconforming building or structure may thereafter be repaired, reconstructed or structurally altered, enlarged or expanded, except in conformity to the Code provisions applicable at the time of such repair, reconstruction, alteration, enlargement or expansion, provided that:
(1) No nonconforming building or structure shall be altered, structurally changed, or enlarged in any manner which would exacerbate or increase the degree or type of nonconformity.
(2) Notwithstanding anything in this subsection to the contrary, if a nonconforming building or structure, is damaged by fire, explosion, force majeure or act of public enemy, or any other cause (other than action by or on behalf of the property owner), to an extent not more than 50% of its value, such building or structure may be restored or reconstructed in its previously nonconforming location and condition only as provided in this Code.
(3) Any nonconforming building which shall not have been used for any lawful purpose for a continuous period of six months or more, for any reason and regardless of intent, shall be presumed to be abandoned as a nonconforming building.