94-4.1.1 Table of Dimensional Requirements. Dimensional requirements shall be as specified in the Table of Dimensional Requirements. The letter "H" denotes the height of the building. The letter "L" denotes the horizontal dimension of the side of the building substantially parallel to the lot line or street line that bounds the yard in question. The letters "N/A" in this table denote types of structures to which particular dimensional requirements are not applicable.

See Table B.

94-4.1.2 Supplementary Dimensional Requirements.

1.

Maximum setback. No part of any building shall be located more than 300 feet from a street in a residential district, or more than 265 feet from a street in any other district unless all such parts of said building are within the same distance from an operative fire hydrant connected to the public water supply and approved as to clearance and location by the chief of the city fire department.

2.

Courts. In any district, inner courts and outer courts shall be permitted only in accordance with the following dimensional requirements:

a.

Inner courts shall have a width of at least 30 feet but not less than the height, and shall have a length of not less than twice nor more than four times the width.

b.

Outer courts shall have a width of at least 30 feet but not less than the height. Such a court with one end open shall not have a length more than the width, and with two ends open a length more than three times the width.

3.

Minimum distance between structures. In any district, the minimum distance between any point of any structures on the same lot shall be as follows:

a.

Buildings accessory to single or two-family detached dwellings shall not be less than ten feet from that detached dwelling unless part of and attached to that dwelling, nor less than ten feet from another accessory building.

b.

Buildings accessory to dwelling structures other than single- or two-family detached dwellings shall not be less than 15 feet from that dwelling structure, nor less than ten feet from another accessory building.

c.

Buildings accessory to other permitted principal structures shall not be less than the same distance from that principal structure and from any other accessory building as if they were on separate lots.

94-4.2.1 Intent. The intent of this section is to provide rules for application of dimensional requirements in special cases, to define special applications of dimensional requirements that may be applied and to further clarify the application of the dimensional requirements within the intent of this section.

94-4.2.2 General Application of Yard Requirements.

1.

Parking spaces not enclosed in a structure but required for any use may be provided in any required yard subject to the provisions of section 94-6.1.4.

2.

Loading spaces not enclosed in a structure but required for any use may be provided in a side yard of a commercial or industrial district or rear yard of any district subject to the provisions of section 94-6.1.4.

94-4.2.3 Application of Front Yard Requirements.

1.

Where, within a distance of 150 feet on each side of a lot on the same side of the same street, front yards of two or more existing buildings have been established to a greater or lesser depth than the required front yard depth, then the average depth of such yards of such existing buildings within such distance shall be the required front yard depth for that lot.

2.

Front yard requirements shall not apply to terraces, steps, uncovered porches, or other similar features at or below the elevation of the floor of the first story, nor to fences, hedges, or walls less than four feet above the grade in the required front yard.

3.

Balconies, and uncovered porches not over half the length of the front building wall, may project into a required front yard but not more than one-third of its width. Belt courses, fins, columns, leaders, sills, pilasters, lintels and ornamental features may project not more than one foot, and cornices and gutters not more than two feet, over a required front yard. In no case shall any such projection come within eight feet of any front lot line.

94-4.2.4 Application of Side Yard Requirements.

1.

Where a side lot line in a commercial district abuts a residential district, the side yard requirements of that residential district shall apply to the abutting yard in the commercial district.

2.

On a corner lot, the side yard adjacent to a street shall be at least that distance required for front yards.

3.

Where a side yard which is required to be in excess of 15 feet is adjacent to a park, reservation or other permanent public open space, then all but 15 feet of the required yard may be measured from the center of said open space.

4.

Bays, balconies, chimneys, flues, and fire escapes, and uncovered porches not over the length of the side building wall may project into a required side yard but not more than one-third of its width. Belt courses, fins, columns, leaders, sills, pilasters, lintels and ornamental features may project not more than one foot, and cornices and gutters not more than two feet, over a required side yard. In no case shall any such projection come within four feet of any side lot line.

5.

Side yard requirements shall not apply to terraces, steps or other similar features at or below the elevation of the floor of the first story, nor to fences, hedges, or walls less than four feet above the grade in the required yard within 15 feet of a street line, and not over six feet above the grade in the required yard in all other cases.

94-4.2.5 Application of Rear Yard Requirements.

1.

No structure shall be built within the rear yard except for a structure accessory to a one or two-family dwelling which may occupy up to 25 percent of the rear yard area.

2.

Where a rear yard which is required to be in excess of 15 feet is adjacent to a park, reservation or other permanent public open space, then all but 15 feet of the required yard may be measured from the center of said open space.

3.

Such projections as are permitted by subsection 94-4.2.4 into side yards are also permitted into rear yards to the same extent.

94-4.2.6 Application of Height Requirements.

1.

The height restriction will be determined in accordance with the definition in section 94-4.2.6.

2.

Church spires, belfries, cupolas, domes, monuments, water towers, observation towers, transmission towers, flag poles, windmills, chimneys, smokestacks, silos, derricks, conveyors, masts, aerials, water tanks or other structures normally built above the roof and not devoted to human occupancy may be built to a height not greater than 150 percent of the height of the principal structure. Such structures, however, shall be erected only to such heights as are necessary to accomplish the purpose they are normally intended to serve.

3.

No structure within 100 feet of the boundary of an SF-1, SF-2, GR or APT-1 district shall exceed four stories, or 50 feet, in height.

94-4.2.7 Application of Minimum Open Space Requirements.

1.

Landscaped open space and usable open space may be included within the front, side, and rear yards, but shall be exclusive of parking and loading areas and access drives.

2.

Landscaped open space and usable open space shall be mutually exclusive.

3.

The requirement for minimum usable open space shall not apply to nonresidential structures, nor to hotels, or other residential structures intended and designed primarily for transient occupancy.

94-4.2.8 Application of Dimensional Requirements to Certain Cases.

1.

If two or more permitted principal uses occupy the same structure, then:

a.

The yard requirements for the entire structure for each use shall be determined, and the greater of the yard requirements of each of the principal uses that occupies each floor shall be applied to that floor; and

b.

All other dimensional requirements shall be the sum of the dimensional requirements for each of the principal uses computed separately except as provided in section 94-6.1.6.

2.

The lot, yard, open space and coverage requirements shall not be applied to a grave site or structure erected thereon.

3.

A parcel consisting of an unregistered lot and a contiguous registered lot may be treated as a lot under the provisions of this chapter only on presentation of a single deed referring to the fact that a lot therein is unregistered and another lot therein is registered, and incorporating a description of the entire parcel, which deed has been recorded in both the Middlesex South District Registry of Deeds and the Middlesex South Land Registry District.

4.

The minimum total lot area for an institutional use in a residential district shall be 80,000 square feet.

5.

The community development board, acting as SPGA, shall have the authority to grant a special permit for applications in the Office 2 District seeking relief from the dimensional requirements as provided in section 94-4.0 and Table B—Dimensional Requirements.

94-4.3.1 Height of Accessory Structure. The height of accessory structures is limited as follows:

1.

Structures accessory to one- and two-family dwellings shall not exceed 15 feet in height.

2.

Structures accessory to other uses shall not exceed the height restriction of the principal structure.

94-4.3.2 Location of Accessory Structure. The location of accessory structures shall be limited as follows:

1.

In residential districts, no accessory structure shall be located within the required front or side yard or any court but may be built in the rear yard subject to section 94-4.2.5.

2.

In commercial and industrial districts, no accessory structure shall be permitted within any required yards.

3.

Any accessory structures must be set back a minimum of three feet from rear and side lot lines, or a one foot separation from lot lines if constructed of fire-resistance wall assemblies, as defined by the State Building Code,

4.

A swimming pool must be set back a minimum six feet from rear and side lot lines measured from the water's edge to the lot lines, and a minimum setback of 12 feet from the lot lines for any type of pump equipment.