The lawful use of a building or premises existing on the date of adoption of this Ordinance may be continued although such use does not conform to all the provisions of this Zoning Ordinance, except as hereinafter provided:
(a) A nonconforming use may. be extended throughout a building provided no structural alterations are made therein, except those required by law.
(b) A nonconforming use may be changed to another nonconforming use of the same or greater restrictions; provided, that no structural changes are made in the building. Whenever a nonconforming use has been changed to a conforming use or to a use permitted in a district of greater restrictions, It shall not thereafter be changed to a nonconforming use of a less restricted one.
(c) No building shall be erected upon any premises devoted to a nonconforming use, and no building located. upon any such premises, which has been damaged by fire or other causes to the extent of more than seventy-five percent (75%) of its appraised valuation, shall be repaired or rebuilt, except in conformity with regulations of this Zoning Ordinance; provided, however, that in the event that the owner of such building located upon any such premises damaged by fire or other causes to the extent of more than seventy-five percent (75%) of its appraised value, shall make application for the repair or rebuilding of such damaged building within six months after the date of such damage by fire or other causes, then a building permit shall be issued for the rebuilding or repair of such building for a nonconforming use of the same or greater restrictions. In the event of the issuance of a building permit for such nonconforming use, the repair or rebuilding of such building shall be completed within one year from the date of the issuance of such building permit. Failure to complete the repair or rebuilding within such period of time will result in the cancellation of such building permit and the dental of a use and occupancy permit and the right to continue such nonconforming use in such building.
(d) The Board of Zoning Appeals may authorize by written permit, in a residentially- zoned district for a period of not more than one year from the date of such permit, a temporary building for commercial or industrial use incidental to the residential construction and development of such district.
(e) Nothing herein contained shall require any change. in the plans, construction or designated use of a building for which a building permit has been heretofore Issued, and the construction of which has been diligently prosecuted within ninety days of the date of such permit and which entire building shall be completed according to such plans filed within three years from September 2, 1952.
(f) In the event that a nonconforming use of any building or premises is discontinued for a period of one year, the use of the same shall thereafter conform to the uses permitted in the district in which it is located. (1969 Code §27-48; 2-16-78)