Any lot, as defined herein, which exists at the time of adoption of this chapter that fails to comply with the minimum area requirements of the chapter may be used for any use not otherwise prohibited in the district in which it lies, provided that said lot is not contiguous to and in common ownership with one or more lots in single ownership as defined in this chapter, and provided further that the side and rear setbacks are held to the same percentages as required in the said district.

Amy use lawfully in existence prior to the adoption of this chapter and which has since been in continuous use but which has been made nonconforming by the adoption of this chapter or any prior zoning ordinance of this Borough (provided that said use commenced prior to the enactment of the chapter which made it nonconforming) may be continued indefinitely; except that, such use may not be enlarged, extended or reconstructed, abandoned and reinstituted or changed to another nonconforming use.

No. building which contains a nonconforming use shall be structurally altered or enlarged or moved to another location where such use would continue to be nonconforming or restored for other than a conforming use after damage from any cause which exceeds 50% of its replacement cost, exclusive of foundation. Failure to restore for a period of one year after damage, or failure of the premises to be utilized for the existing nonconforming use for a period of one year shall be deemed an abandonment for the purposes of this chapter, after which such nonconforming use shall not be reinstituted.

Any structure which at the time of its erection was in conformity with the zoning ordinances of this Borough, and which structure has been rendered nonconforming as to area by the subsequent passage of or amendment to such zoning ordinances, shall be permitted to remain. Any alteration or addition to such structure shall be permitted, provided that: