The Town of Middleton is hereby divided in the classes of districts designated as follows:
Residence Districts
Residential District R-1a
Residential District R-1b
Residential - Agricultural District (RA)
Village Residential District (R2)
Business Districts
Business District (B)
Interstate Highway Business District (IH)
Manufacturing Districts
Light Industrial District (M-1)
[Amended 5-14-2013 ATM by Art. 6; 5-12-2015 ATM by Art. 38; 5-12-2015 ATM by Art. 39; 6-5-2021 ATM by Art. 29]
In addition, the following overlay districts are also hereby established in Section 8.0:
Institutional Overlay District (IOD)
Watershed Protection Overlay District (WPOD)
Floodplain Overlay District (FPOD)
Adult Entertainment Overlay District (AOD)
Medical Marijuana Overlay District (MMOD)
Groundwater Protection Overlay District (GPOD)
The location and boundaries of these districts are hereby established as shown on a map entitled "Zoning Map of the Town of Middleton" dated October 29, 1965, and amendments, including the amendment dated March 22, 1983, and any other amendments approved by the Attorney General up to and including March 24, 2008 (hereinafter referred to as the "Zoning Map"), filed with the Town Clerk and hereby made part of these bylaws.
2.3.1. 
Historic districts. Historic districts established pursuant to the provisions of G.L. c. 40C, as may be from time to time amended, shall be indicated on the Zoning Map.
The following rules shall apply to the interpretation of the Zoning Map.
2.4.1. 
Boundary lines within public or private ways. Where the boundary line (or portion of a boundary line) of a zoning district is shown on the Map within the street line of a public or private way, the center line of such public or private way shall be the boundary line.
2.4.2. 
Boundary lines shown approximately. Where the boundary line or portion of a boundary line of a zoning district is shown approximately on the location of a property or lot line, and the exact location of the property, lot, or boundary line is not indicated by means of dimensions shown in figures, then the property or lot line existing at the time of adoption of these bylaws shall be the boundary line.
2.4.3. 
Boundary lines outside public or private ways. A boundary line (or portion of a boundary line) of a zoning district located outside of a street line and shown to be approximately parallel to the street line shall be regarded as parallel to such street line, and any dimensions shown in figures on the Map between such boundary line and the street line shall be regarded as the distance in feet between such boundary lines and the street line, with the distance being measured at right angles to the street line unless otherwise indicated.
2.4.4. 
Location of other boundary lines. In all cases which are not covered by other provisions of this section, the location of boundary lines shall be determined by the distance in feet, if given, from other lines upon the Zoning Map, by the use of identifications as shown on the Zoning Map, or by the scale of the Zoning Map.
2.4.5. 
Lot split by district lines. Where a district boundary line between a residential, business and/or manufacturing district divides any lot existing at the time such line is adopted, the regulations for the less restricted portion of such lot shall extend no more than 30 feet into the more restricted portion, provided the lot has frontage on a public way in the less restricted district.[1]
[1]
Editor’s Note: Former Section 2.4.6, Contour lines, which immediately followed this section, was repealed 5-12-2015 ATM by Art. 38.