[Amended 12-1-2014 by Ord. No. 14-1005947C; 11-19-2018 by Ord. No. 18-1007337E; 12-16-2019 by Ord. No. 19-1007716E; 8-19-2024 by Ord. No. 24-1009147D]
The City of Marlborough is hereby divided into 15 types of districts to be known as:
Rural Residence Districts
RR
Residence A-1 Districts
A-1
Residence A-2 Districts
A-2
Residence A-3 Districts
A-3
Residence B Districts
RB
Residence C Districts
RC
Retirement Community Residence Districts
RCR
Business Districts
B
Commercial and Automotive Districts
CA
Limited Industrial Districts
LI
Industrial Districts
I
Marlborough Village District
MV
Neighborhood Business District
NB
Wayside Zoning District
Wayside
Donald Lynch Boulevard District
DLB
The boundaries of each of said districts are hereby established as shown, defined and bounded on the map accompanying this chapter and on file with the Clerk of the City of Marlborough, Massachusetts, entitled "Zoning District Map of the City of Marlborough, Massachusetts, January, 1969," as amended, and on the Assessor's maps in the office of the City Engineer. All explanatory matter thereon is hereby made a part of this chapter.
A. 
District boundary lines on ways. Where the boundary lines are shown upon said map within the street lines of public and private ways, railroads or utility lines, the center lines of such ways, railroads or utility lines shall be the boundary lines.
B. 
District boundary lines on lot lines. Where the district boundary lines are shown approximately on the location of property or lot lines and the exact location of property, lot or boundary lines is not indicated by means of dimensions shown in figures, then the property or lot lines shall be the zoning district boundary lines.
C. 
District boundary lines outside of street lines. Boundary lines located outside of such street lines, railroad or utility lines and shown approximately parallel thereto shall be regarded as parallel to such lines, and dimensions shown in figures placed upon said map between such boundary lines and street, railroad and utility lines are the distances in feet of such boundary lines from such street, railroad or utility lines, such distances being measured at right angles to such street, railroad or utility lines unless otherwise indicated.
D. 
Lots extending across the City boundary line.
(1) 
Where a lot as existing at the time this chapter takes effect extends across the boundaries of the City of Marlborough, that portion of the lot lying within the City of Marlborough and with frontage in the City of Marlborough shall comply with the requirements of this chapter for the district in which said portion of the lot is located. Notwithstanding the foregoing, where a development lot extends across the City boundary line, the portions of the development lot both within and without the City shall comply with the requirements of this chapter for the district in which the development lot is located in the City; in addition to the portion of the development lot within the City, the areas without the City but within the development lot shall be computed for purposes of determining such compliance.
(2) 
Notwithstanding the first sentence of Subsection D(1), where a retail lot extends across the City boundary line the portions of the lot both within and without the City shall comply with the requirements of this chapter for the district in which the lot is located in the City; in addition to the portion of the lot within the City, the areas without the City may be computed for purposes of determining that the lot shall comply with the requirements of this chapter for the district in which the lot is located in the City.
E. 
District boundary lines following natural features. Where the district boundary line follows a stream, lake or other body of water, said boundary line shall be construed to be at the thread of the channel of the stream unless otherwise indicated.
F. 
District boundary lines dividing a lot. Where a district boundary line divides any lot existing at the time such line is adopted, the regulations for the less restricted portions of such lot shall extend no more than 100 feet into the more restricted portion of such lot, provided that the lot has frontage on a street in the less restricted district.
G. 
Automatic classification of district line. Where property has not been specifically included within a district, it shall automatically be classified as lying in the most restricted district which abuts it.
H. 
District boundary lines determined by identifications on the maps. In all cases which are not covered by other provisions of this article, the location of boundary lines shall be determined by the distance in feet, if given, from other lines upon said maps by the use of identifications as shown on the maps or by the scale of the maps.
I. 
Determination of uncertain boundary lines. Whenever any uncertainty exists as to the exact location of a boundary line, the location of such line shall be determined by the Building Commissioner; provided, however, that any person aggrieved by his decision may appeal to the Board of Appeals.
[Amended 10-6-2014 by Ord. No. 14-1005921A]
J. 
All areas in each zoning district, including streets or other public lands, are subject to the Zoning Ordinance regulations for the district in which the streets and other areas are located.