[Amended 7-16-1986 by L.L. No. 9-1986; 4-4-1990 by L.L. No. 2-1990; 5-8-1991 by L.L. No. 4-1991; 7-20-1994 by L.L. No. 6-1994; 11-5-2003 by L.L. No. 22-2003; 9-18-2013 by L.L. No. 5-2013]
The Town of Mamaroneck is hereby divided into the following classes of districts:
R-50
One-Family Residence District (50,000 square feet)
R-30
One-Family Residence District (30,000 square feet)
R-20
One-Family Residence District (20,000 square feet)
R-15
One-Family Residence District (15,000 square feet)
R-10
One-Family Residence District (10,000 square feet)
R-7.5
One-Family Residence District (7,500 square feet)
R-6
One-Family Residence District (6,000 square feet)
R-2F
Two-Family Residence District
R-GA
Garden Apartment District
R-A
Attached Residence District
R-TA
Tower Apartment District
B-R
Business-Residential District
LI
Light Industrial District
UR
Urban Renewal District
SB-R
Service Business-Residential District
B-MUB
Business-Mixed Use Business District
R
Recreation District
Said districts are bounded and defined as shown on a sectional map entitled "Official Zoning Map of the Town of Mamaroneck, New York," adopted June 29, 1959, and certified by the Town Clerk, which, with all explanatory matter thereon, is hereby made a part of this chapter.
[1]
Editor's Note: For amendments to the Zoning Map subsequent to its adoption, consult copies on file at the Town Clerk's office.
Where uncertainty exists as to the locations of any boundaries shown on the Zoning Map, the following rules shall apply:
A. 
District boundary lines are intended to follow streets, rights-of-way, watercourses or lot lines or be parallel or perpendicular thereto, unless such district boundary lines are fixed by dimensions as shown on the Zoning Map.
B. 
Where district boundaries are indicated as following approximately streets, rights-of-way or watercourses, the center lines thereof shall be construed to be such boundaries.
C. 
The zoning classification of any water area within the Town inshore from the mean low-tide line on the effective date of this chapter shall be deemed to be the same as the classification of the adjoining land area, and the zoning classification of any area extending outward from the shore beyond said mean low-tide line shall be R-30.
D. 
Where district boundaries are so indicated that they approximately follow lot lines, such lot lines shall be construed to be such boundaries.
E. 
In unsubdivided property or where a district boundary divides a lot, the location of any such boundary, unless the same is indicated by dimensions shown on said map, shall be determined by the use of the map scale shown thereon.
F. 
If the district classification of any land is in question, it shall be deemed to be in the adjoining district which appears first in § 240-5.
Where a lot in one ownership of record at the time of the adoption of this chapter or any amendment thereto is divided by one or more district boundary lines, the Board of Appeals may permit the extension of a use or structure which is a permitted use in one portion of said lot into the portion in which it is not a permitted use, provided that:
A. 
The lot has frontage on a street in the district in which such use is permitted;
B. 
The extension does not come within 100 feet of the street in the other district; and
C. 
Conditions and safeguards are attached to such permit to protect existing or prospective development in the latter district.