No building or land shall hereafter be used or occupied and no building or part thereof shall be erected, moved or altered except in conformity with the regulations herein specified for the district within which it is located.

No building shall hereafter be erected or altered to exceed the height, to occupy a greater percentage of lot area or to have narrower or smaller front, side or rear yards than is specified herein for the district in which such building is located.

No part of a yard or other open space about any building required for the purpose of complying with the provisions of this chapter shall be included as a part of a yard or other open space similarly required for another building, and no lot shall be changed in area after the enactment of this chapter so as to reduce lot size or open spaces of any lot below the minimum herein required.

No more than one principal structure and its accessory buildings as regulated in this chapter may be located on any one lot, except in the case of PDD.

Any nonconforming use now lawfully existing may be continued only in the structure where such nonconforming use now exists. Structures otherwise lawfully existing, arranged, designed or properly devoted to such nonconforming use may not be reconstructed or structurally altered at a cost to exceed 50% of the true valuation of such structures at the time this chapter takes effect, unless they are changed to a conforming use.

If a nonconforming use is discontinued for a period of one year, the structure or the land on which it has been exercised shall thereafter be used in conformity with this chapter.

Any parcel of land with an area and/or a width less than that prescribed for a lot in the district in which said lot is situated may be used for any purpose permitted in the district, provided that all other regulations in this chapter shall be complied with. It shall be understood that this exception applies to the lot or parcel as defined herein qualifying for such exception and that this exception may be enjoyed by any future owner of such parcel, provided he owns no adjacent parcels.

If, at the date of adoption of this chapter, any person possesses a building permit validly issued under the previous Zoning Ordinance of the Town of Binghamton, he shall be allowed to complete the work authorized by said building permit and obtain a certificate of occupancy hereunder specified if all work under said permit is completed either within one year from issuance of said permit or six months from the date of adoption of this chapter, whichever is later. The finished structure shall in all respects comply with the requirements of the zoning law under which said building permit was issued.

If, at the date of adoption of this chapter, any person possess a mobile home occupancy permit issued under the provisions of Chapter 148, Mobile Homes, of the Code of the Town of Binghamton he shall be entitled to maintain a mobile home pursuant to said Chapter 148 if said mobile home is occupied in compliance with said Chapter 148 either in one year from issuance of said permit or six months from date of adoption of this chapter, whichever is later, and shall be entitled to annual renewals of said permit as required by said Chapter 148 if he remains in compliance with said Chapter 148. Anyone validly occupying a mobile home under a mobile home occupancy permit issued prior to the date of adoption of this chapter may replace said mobile home by a mobile home manufactured after the date of manufacture of the mobile home so occupied, upon compliance with all of the conditions of Chapter 148, Mobile Homes, and of this chapter.