Damage to Buildings or Structures. Any nonconforming use, building or structure, other than a single-family detached dwelling on an undersized lot, which shall be more than 50% damaged by reason of windstorm, fire, explosion or other act of God or man shall be deemed completely destroyed and the use, building or structure may not be reestablished, rebuilt, restored or repaired except in conformity with this Chapter. For single-family homes on undersized lots which shall be destroyed as described above, said structures may be reconstructed, provided that no aspect of the new or rebuilt structure increases any nonconformity of the original structure or causes any new nonconformity with this Chapter.