For single-family dwellings:

Parcels located in a Moderate Density District (RM) are:

For two-family dwellings, whether new or by conversion of an existing one-family dwelling, each lot must have, as a minimum, twenty thousand (20,000) square feet, consisting of a frontage of not less than one hundred thirty (130) feet and a depth and a width of not less than one hundred (100) feet. Two-family dwellings must be first approved by the Planning Board by special permit as required by Article VIII of this chapter.

In all districts, frontage may be measured at the front yard setback line if the street is an arc of a curve with a radius of one hundred (100) feet or less, provided that in any event there shall be not less than seventy-five percent (75%) of the required frontage at the street line. Notwithstanding the above provision, where the literal enforcement of this subsection would substantially diminish the value of the land, due to the shallowness or other irregularity of the lot boundaries or the curved or other peculiarity of the street location or other valid reason, the owner thereof may apply to the Board of Appeals for relief, and said Board shall grant, upon equitable terms and conditions, such relief as will carry out the intent of this chapter, but in no event to reduce the frontage to less than eighty-five (85) feet or reduce the minimum lot area for single-family dwellings below seven thousand five hundred (7,500) square feet or two-family dwellings below fifteen thousand (15,000) square feet.

A child-care facility shall be permitted only on:

In an Institutional Open Space (IOS) District, each lot must have a minimum lot area of twenty thousand (20,000) square feet, with a frontage of not less than one hundred (100) feet, a depth of not less than one hundred (100) feet and a width of not less than one hundred (100) feet.

See Table of Dimensional Requirements.[1]

Residential districts.

In Business Districts, Business Professional Districts, North Randolph Business District, West Corners Business District, Blue Hill River Highway District and Great Bear Swamp Highway District, no building shall be erected within fifteen (15) feet of the side line of any street, except in that part of the east and west sides of North Main Street from Crawford Square northerly within the Crawford Square Business District, where no front yards shall be allowed. No outdoor play area (an area designed or set aside for children in a child-care facility for recreation or play) shall be located closer to the street than the minimum requirements of this section.

In Industrial Districts, no building shall be erected within fifty (50) feet of the side lines of any street. No outdoor play area (an area designed or set aside for children in a child-care facility for recreation or play) shall be located closer to the street than the minimum requirements of this section.

In multifamily districts or zones, no building shall be erected or accessory use permitted except for walkways and driveways allowed within forty (40) feet of the side lines of any street. No outdoor play area (an area designed or set aside for children in a child-care facility for recreation or play) shall be located closer to the street than the minimum requirements of this section.

In Multifamily 55 Plus Districts or zones, no building shall be erected or accessory use permitted except for walkways and driveways allowed within forty (40) feet of the side lines of any street.

In an Institutional Open Space (IOS) District, no building shall be constructed within twenty-five (25) feet of the side lines of any street. No outdoor play area (an area designed or set aside for children in a child-care facility for recreation or play) shall be located closer to the street than such minimum setback requirements.

See Table of Dimensional Requirements.[1]

In the Orchard Street Business District (OSBD), "front yard" and "from street" shall refer to North Main Street.

In a residential district, no building, except a fireproof one-story building of accessory use, shall be erected within fifteen (15) feet of a side lot line for single-family dwellings or within twenty (20) feet of a side lot line for two-family dwellings, unless more than forty (40) feet from the side line of any street.

In a Business District, Business Professional District, Crawford Square Business District, Industrial District, North Randolph Business District, West Corners Business District, Great Bear Swamp Highway District or Blue Hill River Highway District, no building shall be erected within the buffer zone specified in § 200-33, nor within six (6) feet of a side lot line unless the wall adjoining such lot line shall be either a party wall or a wall with its outer face coincident with said lot line.

In Multifamily Districts and Multifamily 55 Plus Districts or zones, no building shall be erected or accessory use allowed within forty (40) feet of a side lot line, except that not more than two (2) walkways and/or driveways may cross this forty-foot buffer strip.

On a lot containing the proposed child-care facility use, no outdoor play area (an area designed or set aside for children in a child-care facility for recreation or play) shall be located closer to a lot line than the minimum yard setback requirements for the principal use in the district in which it is located.

In an Institutional Open Space (IOS) District, no building shall be constructed or accessory use allowed within fifteen (15) feet of a side lot line. No outdoor play area (an area designed or set aside for children in a child-care facility for recreation or play) shall be located closer to a side lot line than such minimum setback requirements.

See Table of Dimensional Requirements.[1]

In all districts, no building shall be erected within fifteen (15) feet of any rear lot line unless said building shall be of fireproof construction and the wall adjoining said rear lot line shall be either a party wall or wall with its outer face coincident with said rear lot line, except that said construction is prohibited in a buffer zone as specified in § 200-33.

In Multifamily Districts and in Multifamily 55 Plus Districts or zones, no building shall be erected or accessory use allowed within forty (40) feet of a rear lot line, except that not more than two (2) walkways and/or driveways may cross this forty-foot buffer strip.

See Table of Dimensional Requirements.[1]

In the Orchard Street Business District (OSBD), "rear yard" shall refer to Orchard Street and Vesey Road.

Corner lots and intersecting streets. No building or structure in any district may be erected and no fence or vegetation, except tree trunks, may be maintained or allowed to remain between three (3) feet and eight (8) feet above the plane through their center-line grades between the property lines of intersecting streets and a line joining points on such lines twenty-five (25) feet distant from their point of intersection or, in the case of a rounded corner, the point of intersection of their tangents.

Driveways and sidewalks or other pavement. No fence or vegetation, except tree trunks, shall be located within a site triangle so as to obstruct visibility between three (3) feet and eight (8) feet above the plane through their curb grades. The site triangle is that area of the intersection of street rights-of-way or pavement with other streets, driveways or walkways, formed by the side lines of street rights-of-way or pavement, driveways or walkways and a line joining points on such lines ten (10) feet distant from their point of intersection.

Business Districts, Crawford Square Business District, Business Professional Districts, North Randolph Business District, West Corners Business District, Blue Hill River Highway District or Great Bear Swamp Highway District.

Industrial Districts abutting residential districts or multifamily districts.

Sanitary Facility District. In a Sanitary Facility District where the lot abuts the side or rear boundary line of land owned by others in a residential district, as herein defined, there shall be provided on all portions of said lot which abut said residential district a buffer strip fifty (50) feet in depth from said residential district. Such a buffer strip shall be a planting area for trees, shrubs and other landscape materials, to provide a separation between the residential district and the Sanitary Facility District. No building or structure of any nature, except for fences, and drainage systems, and nonaccessory signs, shall be constructed or maintained in the buffer strip, which area should be fenced as developed until the total area is enclosed. The above restrictions shall not apply to nonaccessory signs.

Child-care facility. In all districts, the open space between the defined outdoor play area or structure and the property lines adjacent to residential uses shall be screened with either fence, wall, hedge, or landscaping to provide a dense year round screen.

In an Institutional Open Space (IOS) District where the lot abuts or is within ten (10) feet of the front, side or rear boundary line of any residential district (including any residential districts in an adjacent municipality) or multifamily district, there shall be provided on all portions of said lot within ten (10) feet of said boundary line a buffer strip, which shall be maintained as a planting area for lawns, trees, shrubs, and other landscaping materials to provide a parklike area of separation between districts. No building, structure or pavement of any nature may be constructed or maintained in this buffer zone except for approved driveways and walkways.

Residential districts. In a zoned residential district, no building, structure or pavement of any nature may be constructed or maintained in a buffer zone except to provide a driveway and/or walkway no wider than twenty-four (24) feet to allow ingress to and egress from the lot.

Buffers shall conform to the Table of Dimensional Requirements included as an attachment to this chapter for each district and districts abutting same districts. Nothing in this section shall allow one (1) district or lot to use an adjoining district or lot to meet its buffer requirement.

Building lot coverage.

Impervious lot coverage. In all districts, no lot shall have more coverage by impervious surface than as specified in the Table of Dimensional Requirements.[3] Ramps for the disabled, for which the sole purpose is to provide access for the disabled, and which have no more than the minimum dimensions required to meet accessibility standards, shall not be counted as coverage.

Green area/open space. See definitions.

Maximum lot coverage. The total lot non-green area/open space may not exceed the maximum coverage specified in the Table of Dimensional Requirements.[4] In order to fulfill the intent of maximum lot coverage, an applicant may shift a percentage of the building lot coverage requirement and the impervious lot coverage requirement, but in no case shall the maximum coverage percentage noted in the table be exceeded.

Multifamily district. In a multifamily district or zone, no apartment building or group of apartment buildings shall be built, reconstructed, extended or arranged so that the total floor area of all the buildings on any lot in a multifamily district shall exceed twenty percent (20%) of the area of the lot on which they stand, or not more than seven (7) family units per acre of land covered by the lot shall be permitted. No lot or the buildings thereon shall be changed in size so as to violate the provisions of this subsection. For the foregoing purpose, no part of the area of a way, public or private, which adjoins said lot shall be considered to be included in the area of said lot. For purposes of this subsection, floor area shall be the sum of the area of the several floors of each building, including area used for human occupancy in basements, attics and penthouses, as measured from the exterior faces of the wall. It shall not include unoccupied cellars or attics or unenclosed porches or balconies or any floor space in accessory buildings or main buildings intended and designed for the parking of vehicles or for accessory mechanical and electrical equipment, laundry or accessory storage.

See Table of Dimensional Requirements.[5]

In all districts, no building shall be erected so as to exceed the maximum building heights as specified in the Table of Dimensional Requirements for the district in which the building is located.[1]

Limitations of height, in feet, shall not apply to chimneys, ventilators, skylights, bulkheads and other accessory features, excluding water tanks, usually carried above roofs, nor to towers or spires of places of worship and other buildings, if such features are in no way normally used for human occupancy, and other buildings in business-zoned areas only, excluding buildings in areas surrounded by residential on at least two (2) sides, where maximum building height will be three (3) stories or forty (40) feet only.