Chapter 7-06
DENSITY AND DIMENSIONAL REGULATIONS

Sections:

7-06-010    General provisions

7-06-020    Table of Density and Dimensional Regulations

7-06-030    Supplemental regulations

7-06-010 General provisions.

No building or structure in any district shall be built, located or enlarged which does not conform to the minimum requirements of this chapter.

(4-27-09 ATM, Art. 31; 4-26-10 ATM, Art. 28.)

7-06-020 Table of Density and Dimensional Regulations.

Density and dimensional regulations shall be in accordance with the Table of Density and Dimensional Regulations (Table 2) and the supplemental regulations in Section 7-06-030.

(4-27-09 ATM, Art. 31; 4-26-10 ATM, Art. 28; 4-22-13 ATM.)

7-06-030 Supplemental regulations.

A.    Minimum lot area. In all districts except the Downtown Business (DB) and Downtown Neighborhood (DN) districts, at least fifty percent (50%) of the minimum lot area shown in the Table of Density and Dimensional Regulations shall be contiguous upland, exclusive of resource areas subject to MGL C. 131, § 40 for reasons other than being subject to flooding. In the DB and DN Districts, one hundred percent (100%) of the minimum lot area shall be such contiguous upland.

B.    Lot frontage.

(1)    Lot frontage shall be measured in a continuous line along the sideline of a street between the points of intersection of the side lot lines with the street. For a corner lot, frontage may be measured either to the point of intersection of the extension of the sideline of the rights-of-way or to the middle of the curve connecting the sideline of the intersecting streets. If a lot has frontage on more than one (1) street, the frontage on one (1) street only shall be used to satisfy the minimum lot frontage requirement.

(2)    In a residential district, where the radius of the center line of the frontage street is one hundred (100) feet or less, the minimum lot frontage requirement may be reduced to fifty percent (50%) of the minimum frontage shown in the Table of Density and Dimensional Regulations.

(3)    Reduced lot frontage. In all residential districts, a minimum frontage of fifty (50) feet shall be permitted; provided, that the building lot size shall be not less than one hundred seventy thousand (170,000) square feet and no part of the lot between the front line of the building and street line shall be less than fifty (50) feet in width. In addition, lots with reduced frontage shall require:

(a)    A separate driveway for each lot unless the Planning Board grants a special permit for a common driveway to serve more than one (1) lot. A common driveway serving more than two (2) lots shall meet the Town of Northborough’s minimum road standards. In no case shall more than five (5) lots be served by one (1) common driveway. Design requirements shall meet the standards for common driveways as outlined in Section 10-36-130. Provision for adequate fire protection must be approved by the Fire Chief prior to the issuance of the special permit.

(b)    All common driveways to exit on the frontage street.

(c)    The minimum lot width at the building line to be one hundred (100) feet.

(d)    A minimum setback of thirty (30) feet from all lot lines, including for accessory structures such as a swimming pool.

C.    Yard requirements.

(1)    General.

(a)    No part of a yard or other open space, off-street parking or loading space, or other accessory space required in connection with any building shall be used to meet the requirements for any other building unless specifically permitted in this bylaw.

(b)    No required yard abutting a public street shall be used for the storage or display or abandonment of merchandise, lumber, building material, equipment, salvable secondhand items, or any type of junk, scrap, trash, rubble, or discarded or abandoned equipment or materials.

(c)    No accessory structure shall be erected in any required front, side, or rear yard or within ten (10) feet of any principal building, except by special permit from the Zoning Board of Appeals.

(2)    Measurement.

(a)    The front yard shall be the distance measured in a straight line between the lot frontage and the nearest point of any building or structure, excluding roof overhangs. Roof overhangs shall not extend further than two (2) feet into the minimum required front yard. A lot having frontage on two (2) or more streets shall have two (2) or more front yards, each of which shall comply with the requirements of the front yard provisions. In no case shall any building or structure be located closer to the sideline of a street than the minimum required front yard.

(b)    Side and rear yards shall be the distance measured in a straight line from the nearest point of any building or structure to each side or rear lot line, excluding roof overhangs. Roof overhangs shall not extend further than two (2) feet into the minimum required side or rear yard.

(3)    In residential districts:

(a)    In the Single Residence A, B, and C Districts, when a new detached single-family dwelling is proposed on a lot that abuts existing single-family dwellings, the minimum front yard setback for the new dwelling may be the average front yard setback of existing dwellings within two hundred fifty (250) feet on the same side of the street.

(b)    Where the side yard setback of an existing residence is less than the minimum required side yard setback requirement, an accessory structure or a structure attached to the residence may be constructed on the same line as the residence.

(c)    Accessory buildings for nonresidential uses that are related to uses permitted in residential districts and not more than one (1) story in height are permitted on the same lot, provided they meet the front, side and rear setback requirements of this chapter.

(d)    No portion of a swimming pool shall be located nearer than fifteen (15) feet to the side or rear lot lines nor within the thirty (30) foot front setback line.

(e)    In the RC, GR, MSR, and DN Districts, for accessory structures commonly called “storage sheds,” “greenhouses,” “cabanas,” “pool equipment sheds,” “gazebos,” and similar uses, the side and rear setbacks shall be five (5) feet; provided, that the structure does not exceed one hundred twenty (120) square feet in area and one (1) story in height.

(f)    Porches or steps, provided such are not enclosed, may be as near as twenty (20) feet to front line of the street.

(4)    In nonresidential (business and industrial) districts:

(a)    No accessory structure or use shall be established within the front, side or rear setbacks on a lot, except for driveways and permitted signs. The location of off-street parking shall be in accordance with Section 7-09-030.

(b)    In the Industrial District, the minimum setback along the lot line adjacent to a residential or business district shall be one hundred (100) feet from a residential district and fifty (50) feet from a business district. When the residential zoning district boundary is located in or at a street, the setback may be reduced by the width of the street which is in the residential zone.

D.    Lot coverage shall be as defined in Chapter 7-02. In the Downtown Neighborhood District, maximum lot coverage shall not apply to a two-family or multifamily dwelling.

E.    Open space.

(1)    No more than fifty percent (50%) of the minimum open space for any lot as required in the Table of Density and Dimensional Regulations shall be freshwater wetlands, as defined in MGL C. 131, § 40.

(2)    Open space used to satisfy the requirements of this chapter shall conform to the standards in Section 7-09-020(C)(4), as applicable.

(3)    In a business district, the special permit granting authority or site plan approval issuing authority may authorize a reduction in the minimum open space requirement in order to accommodate an increase in parking under Section 7-09-030.

F.    Repealed by 4-22-13 ATM.

G.    Building height. Building height shall be as defined in Chapter 7-02.

(1)    In the Industrial District, building height may be increased to eighty (80) feet by special permit from the Planning Board; provided, that for every foot of height in excess of sixty (60) feet, there shall be added to each yard requirement two (2) corresponding feet of width or depth.

(2)    In a residential district, for any use other than a single-family or two-family dwelling, the maximum building height shall be thirty-six (36) feet, except that in the Downtown Neighborhood District, the Zoning Board of Appeals may grant a special permit, subject to any conditions the Board deems appropriate, to increase the maximum building height to forty (40) feet; provided, that the upper story is contained under a pitched roof.

H.    Only one (1) principal building shall be permitted on a lot except as may be allowed by special permit. Where two (2) or more buildings are allowed on the same lot, the minimum separation between them shall be twenty (20) feet.

I.    Building orientation in Single-Family Residential Districts A, B, and C.

(1)    Dwellings shall be oriented to the street wherever possible. However, to allow for solar orientation, a building may be oriented on the lot for maximum solar utilization.

(2)    If the front of a dwelling faces another parcel of land rather than a street, the front building line shall be at least thirty (30) feet from the lot line.

J.    Supplemental density and dimensional regulations for certain use classes.

(1)    Where vertical or horizontal mixed-use developments or multifamily or townhouse developments are allowed as of right or by special permit in a business district, the minimum lot area shall be determined as follows:

(a)    In the Downtown Business District, for vertical or horizontal mixed-use developments, four thousand (4,000) square feet for the first two (2) units and two thousand five hundred (2,500) square feet per unit for each unit over two (2); and for multifamily or townhouse developments, ten thousand (10,000) square feet for the first two (2) units and three thousand five hundred (3,500) square feet per unit for each unit over two (2).

(b)    In the Business East District, for vertical mixed-use developments, twenty thousand (20,000) square feet for the first two (2) units and three thousand five hundred (3,500) square feet per unit for each unit over two (2).

(c)    In the Business West District, for vertical or horizontal mixed-use developments, forty thousand (40,000) square feet for the first two (2) units and five thousand (5,000) square feet per unit for each unit over two (2); and for multifamily developments, twenty thousand (20,000) square feet for the first two (2) units and seven thousand (7,000) square feet per unit for each unit over two (2).

(d)    In the Business South District, for vertical or horizontal mixed-use developments, forty thousand (40,000) square feet for the first two (2) units and five thousand (5,000) square feet per unit for each unit over two (2).

(2)    In the Downtown Neighborhood District:

(a)    For multifamily and townhouse developments, there shall be at least ten thousand (10,000) square feet of lot area for the first two (2) units and four thousand five hundred (4,500) square feet per unit for each unit over two (2).

(b)    For cottage dwellings, there shall be at least five thousand (5,000) square feet of lot area per dwelling.

(3)    In any district where a congregate residence is allowed as of right or by special permit, the maximum density shall be one (1) unit per three thousand (3,000) square feet of lot area.

(4)    For hotels, motels, and conference centers in any district, the minimum lot area shall be fifteen (15) acres and minimum lot frontage shall be five hundred (500) feet.

(5)    The following shall apply to two-family dwellings in the RC, GR, MSR, and DN districts, except that the Planning Board may approve a waiver to reduce one (1) side to fifteen (15) feet as long as the remaining five (5) feet are added to the other side yard, such that the sum of the setbacks on each side shall not be less than forty (40) feet:

 

 

 

 

Minimum Yard Setbacks

District

Minimum Lot Area (sq. ft.)

Minimum Lot Frontage (feet)

Minimum Lot Width (feet)

Front

Side

Rear

RC

30,000

150¹

150¹

See Table 2

20

See Table 2

GR

25,000

150

150

See Table 2

20

See Table 2

MSR

25,000

100

100

See Table 2

20

See Table 2

DN

20,000

100

100

See Table 2

20

See Table 2

¹    The Planning Board may approve a waiver to reduce the minimum lot frontage and minimum lot width to one hundred (100) feet by special permit upon a determination that it would not be detrimental to the neighborhood, would be appropriate with respect to the surrounding properties and activities, and would not disturb any consistency of the neighborhood.

K.    Lots in two (2) towns. In the event that a lot is located partially outside of the Town of Northborough, frontage and lot area located outside of the Town of Northborough may be used to satisfy the minimum frontage and lot area requirements of this bylaw; provided, that this section shall only apply if: (1) the use on such lot is one (1) of the following: residential; extensive uses such as agricultural, conservation, or recreation; municipal; institutional; or public utility, as defined in Section 7-05-020, or (2) if the use is a permitted use on the entirety of the lot whether in the Town of Northborough or another town.

Table 2. Table of Density and Dimensional Regulations.1

 

Minimum Lot Area

Minimum Lot Frontage

Minimum Lot Width

Minimum Yard Setbacks

Maximum Front Setback2

Maximum Lot Coverage

Minimum Open Space

Maximum Height

District

(sq. ft.)

(feet)

(feet)

Front

Side

Rear

 

 

 

Stories

Feet

RA

80,000

200

200

30

15

25

-

-

-

-

35

RB

40,000

150

150

30

15

25

-

-

-

-

35

RC3

20,000

100

100

30

15

25

-

-

-

-

35

GR3

15,000

100

100

30

15

25

-

30%

-

-

35

MSR3

15,000

100

100

30

15

25

-

30%

-

-

35

DN3

10,000

50

None

15

20

20

30

30%

20%

-

35

DB

4,000

50

None

6

None

None

20

-

15%

-

45

BE

20,000

150

None

15

20

25

75

-

20%

3.0

45

BW

20,000

150

None

15

20

25

75

-

20%

3.0

45

BS

40,000

150

None

40

25

25

-

-

25%

3.0

45

HB

40,000

150

None

50

25

25

-

-

25%

-

-

I

60,000

150

None

40

20

25

-

50%

25%

-

60

1    Additional requirements apply in some districts and for some classes of use. See Section 7-06-030, Supplemental regulations.

2    Maximum front setback applies only to new construction.

3    See Section 7-06-030(J)(5) for lot regulations that apply to two-family dwellings.

(4-24-17 ATM; 4-27-09 ATM, Art. 31; 4-26-10 ATM, Art. 28; 4-24-12 ATM, Arts. 48, 49; 4-22-13 ATM; 4-23-18 ATM, Art. 39.)