Any land, the existing lawful use of which does not conform to the regulations of the district in which it is located either because of the original passage of this chapter or because of subsequent amendment of applicable regulations, shall have such use considered as a nonconforming use which may continue on such land but shall be subject to regulations governing nonconforming uses.

Any lawful building or the lawful use of any building which does not conform to use, height, location, size, bulk or other regulations of the district in which it is located, either because of the original passage of this chapter or because of subsequent amendment of applicable regulations, shall be considered a nonconforming building or use and may continue as such in its present location, but shall be subject to the regulations governing nonconforming uses.

A nonconforming building or use shall be considered as such unless and until it complies with the regulations of the district in which it is located. Such use shall not be changed to a use designated for a district having less restrictive regulations.

If a nonconforming use of land ceases and the landowner intends to abandon the use, then subsequent use of such land shall be in conformity with the regulations of the district in which it is located. Should a nonconforming use cease for a continuous period of one year or more, then it shall be presumed that the landowner has intended to abandon such nonconforming use.

Any lawful nonconforming use of a portion of a building may be extended throughout the building, and any lawful nonconforming building or any building of which a lawful nonconforming use is made may be extended upon the lot occupied by such building and held in a single and separate ownership on the date it first became such, provided that the area of such building shall not be increased by more than a total of 25% of the area of such building existing on the date it first became a lawful nonconforming building or a building of which a lawful nonconforming use is made, and provided further that any structure, alteration, extension or addition shall conform to all the height, area, width, yard and coverage requirements for the district in which it is located.

The Zoning Hearing Board shall have discretion to determine what resumption or change of nonconforming use is of the same class of use and permissible.

A nonconforming building which has been damaged or destroyed by fire, explosion, accident or calamity (as contrasted to deterioration due to time or neglect) may be reconstructed and used for the nonconforming use, provided that:

A nonconforming building which has been legally condemned shall not be rebuilt or used except in accordance with the provisions of this chapter.

A temporary nonconforming use which will benefit the public health or welfare or promote proper development of a district in conformity with the intent of this chapter may be permitted for a period of not more than one month, on the approval of the Zoning Hearing Board, but any such use to be permitted for a longer period shall require a public hearing thereon, after which Zoning Hearing Board authorization may be issued for a period not exceeding one year in any case.