Any lawful building, structure or use of premises existing at the time of enactment of this chapter or any subsequent amendment thereof applying to such building, structure or use of premises may be continued although such building, structure or use of premises does not conform to the provisions thereof, except as follows:
A. 
Any sign which becomes nonconforming upon the date of enactment of this chapter shall be removed or altered so as to conform within three years after such date of enactment.
B. 
Any undeveloped lot in a subdivision which was not properly approved by the Planning Board and/or not filed in the office of the County Clerk and whose area and/or depth are less than the specified minimum lot requirements and average density requirements of this chapter shall be considered a violation of this chapter.
C. 
Any existing extractive operations and/or soil mining operation in an A or I-1 District shall comply with the fencing requirements of § 135-28C within one year of the effective date of this chapter.
Any building or land used for or occupied by a nonconforming use which is changed to or replaced by a conforming use shall not thereafter be used for or occupied by a nonconforming use.
Any building or structure on which construction was begun prior to the effective date of this chapter or any subsequent amendment thereof applying thereto may be completed and used in accordance with the plans and specifications for such building or structure.
A. 
Any lot held in single and separate ownership prior to the adoption of this chapter and whose area and/or width and/or depth are less than the specified minimum lot requirements of this chapter for the district in which such lot is located may be considered as complying with such minimum lot requirements and no variance shall be required, provided that:
(1) 
Such lot does not adjoin any other lot or lots held by the same owner whose aggregate area is equal to or greater than the minimum lot area required for that district.
(2) 
Such lot has an area of at least 5,000 square feet and a minimum width of at least 50 feet at the required setback line if it is to be used for residential purposes.
(3) 
The following minimum yard dimensions are maintained for residences:
(a) 
Each side lot must not be less than 10% of the average lot width, and in no event shall the minimum side lot setback be less than eight feet.
(b) 
Front and rear yards, 25 feet.
(4) 
All other bulk requirements for that district are complied with.
B. 
In any district where residences are permitted, such undersized nonconforming lots may be used for not more than one single-family dwelling.
C. 
A lot on nonconforming size may be subdivided if each and every subdivision of such lot is purchased by the owner or owners of the adjoining properties to increase the size of said owner's or owners' property or properties.
In accordance with Town Law Section 265-a, any lot proposed for residential use in a subdivision whose plat delineates one or more new streets, roads or highways, and which said subdivision plat has been properly approved by the Planning Board and filed in the office of the County Clerk prior to the passage of this chapter, and whose area and/or width and/or depth are less than the specified minimum lot requirements of this chapter for that district, shall be considered as complying with such minimum lot requirements for two years after the filing of the subdivision plat. If at the time of the filing of the subdivision plat referred to above there was no Planning Board vested with authority to approve subdivision plats, then the exemption provided for in such subdivision shall apply for a period of one year after the filing of said subdivision plat in the office of the County Clerk.