A nonconforming building or structure may be maintained.

Repairs and structural alterations may be made to a nonconforming building or to a building housing a nonconforming use.

1. A building or structure occupied by a nonconforming use and a building or structure nonconforming as to height, area or yard regulations shall not be added to or enlarged in any manner or moved to another location on the lot except as provided by subsection B of this section.
2. A building or structure occupied by a nonconforming use or a building or structure nonconforming as to height, area or yard regulations may be added to or enlarged or moved to a new location on the lot upon a permit authorized by the board of adjustment, which may issue, provided that the board of adjustment after hearing, shall find:
   1. The addition to, enlargement of, or moving of the building will be in harmony with one or more of the purposes of this title as stated in Section 17.04.020, and shall be in keeping with the intent of the title.
   2. That the proposed change does not impose any unreasonable burden upon the lands located in the vicinity of the nonconforming use or structure.

A building or structure lacking sufficient automobile parking space in connection therewith as required by this title may be altered or enlarged provided additional automobile parking space is supplied to meet the requirements of this title for such alteration or enlargement.

A nonconforming building or structure or a building or structure occupied by a nonconforming use which is damaged or destroyed by fire, flood, wind, earthquake or other calamity or act of God or the public enemy, may be restored and the occupancy or use of such building structure or part thereof, which existed at the time of such damage or destruction may be continued or resumed, provided that such restoration is started within a period of one year and is diligently pursued to completion.

A building or structure or portion thereof occupied by a nonconforming use, which is, or hereafter becomes, vacant and remains unoccupied by a nonconforming use for a continuous period of one year, except for dwellings and buildings to house animals and fowl, shall not thereafter be occupied except by a use which conforms to the use regulations of the zone in which it is located.

The occupancy of a building or structure by a nonconforming use, existing at the time the ordinance codified in this title becomes effective, may be continued.

A vacant building or structure may be occupied by a use for which the building or structure was designed or intended if so occupied within a period of one year after the use became a nonconforming use.

The nonconforming use of a building or structure may not be changed except to a conforming use; but where such change is made, the use shall not thereafter be changed back to a nonconforming use.

A nonconforming use may be extended to include the entire floor area of the existing building in which it is conducted at the time the use became nonconforming.

The nonconforming use of land, at the time the ordinance codified in this title becomes effective, may be continued; provided, that no such nonconforming use of land shall in any way be expanded or extended either on the same or on adjoining property, and provided that if such nonconforming use of land, or any portion thereof, is abandoned or changed for a period of one year or more, any future use of such land shall be in conformity with the provisions of this title.