A. 
The City of Amsterdam is hereby divided into the following eight zoning districts:
LDN
Low Density Neighborhood District
MDN
Medium Density Neighborhood District
MRN
Medical Residential Neighborhood District
CC
Commercial Corridor District
DC
Downtown Core District
ED
Employment District
LI
Light Industrial District
PUD
Planned Unit Development District
B. 
Three overlay districts are also hereby created:
GW-O
Greenway Corridor Overlay Zone
HR-O
Historic Resources Overlay Zone
GT-O
Gateway Overlay Zone
The location and boundaries of said districts are established on the Zoning Map of the City of Amsterdam. Said map together with all explanatory matter thereon and all amendments thereto is hereby declared to be an appurtenant part of this chapter. Said map shall be kept up-to-date and be located in the offices of the City Clerk for the use and benefit of the public. A certified copy of said map shall also be maintained in the Office of the Building Inspector. In accordance with § 250-7.1, please refer to the Federal Emergency Management Agency's Flood Hazard Boundary and Flood Insurance Rate Map (FIRM) for delineation of the Greenway Corridor Overlay (GW-O) District.
A. 
The zoning district boundaries are intended generally to follow the center lines of streets; the center lines of railroad rights-of-way; existing lot lines; rear property lines of City blocks, the center lines of rivers, streams and other waterways; and City boundary lines. Where a zoning district boundary line does not follow such a line, its location shall be shown on the Zoning Map by a specific dimension expressing its distance in feet from a street line or other boundary line as indicated.
B. 
Where a district boundary divides a single lot in a single or joint ownership of record at the time such boundary is established, the regulations for the less restricted portion of such lot may, at the owner's discretion and with the exception of flood hazard zones, extend not more than 30 feet into the more restricted portion, provided that the lot has street or highway frontage in the less restricted district.
The boundaries of the Greenway Corridor Overlay Zone are established herein as delineated on the most current edition of the appropriate Federal Emergency Management Agency's Flood Hazard Boundary Map/Flood Insurance Rate Map as issued for the City of Amsterdam. Any revisions, amendments or successors thereto, with all explanatory matter thereon, are hereby adopted and made a part of this chapter. The latest edition of said map shall be kept on file in the offices of the City Clerk and the Building Inspector for the use and benefit of the public.
Any regulations or restriction of the Greenway Corridor Overlay District does not void or supersede the recommendations and projects of the 1992-1993 City of Amsterdam Local Waterfront Revitalization Plan.
Except as hereinafter otherwise provided:
A. 
No building or structure shall be erected and no existing building or structure shall be moved, altered, added to or enlarged, nor shall any land, building or structure be designed, used or intended to be used for any purpose or in any manner except in conformance with the regulations specified herein for the district in which it is located.
B. 
No yard or existing lot at the time of passage of this chapter shall be reduced in size or be below the minimum requirements set forth herein. Yards or lots created after the effective date of this chapter shall meet the minimum requirements established by this chapter. Other special lot requirements are found in Article V.
C. 
No part of any yard or other open space required in connection with any building or use shall be considered as providing part of a yard or other open space similarly required for another building.
D. 
No off-street parking or loading space required for one building or use shall be considered as meeting, in whole or in part, the off-street parking or loading space required for another building or use, except as otherwise provided by this chapter.
E. 
There shall be not more than one principal building and one principal use, nor more than two accessory structures, of which no more than one shall be a private garage, on each lot intended or used for residential purposes, except as provided within Article IX of this chapter.
F. 
Within each district, the regulations set forth by this chapter shall be considered minimum regulations and shall apply uniformly to each kind of building, structure or land.
Any land hereafter annexed to or consolidated with the City of Amsterdam shall be deemed to be zoned Low Density Neighborhood (LDN) District until such land is reclassified by specific amendment to this chapter. Said provision shall not be construed to preclude concurrent consideration of the annexation of land and its classification to a zoning district other than Low Density Neighborhood (LDN) District by the Common Council, provided that the amendment procedure set forth in Article XII of this chapter is followed, including compliance with all applicable requirements of the General City Law, the General Municipal Law and the Environmental Conservation Law, specifically SEQRA, Article 8 of the Environmental Conservation Law and related Title 6, Part 617, NYCRR.