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Summary of Existing and Proposed Height,
Floor Area Ratio, and Open Space Regulations

     

Maximum Floor Area Ratio

Maximum Height

Open Space

Last

Use Group

District

Description

Exist

Proposed

Change (%)

Exist

Prop

Change

Exist

Prop

changed

                       

Residential

Res B

low density

0.5

0.4

-20%

35

35

0

20%

40%

1995

Residential

Res C

low density multifamily

0.6

0.6

0%

35

35

0

18%

35%

1987

Residential

Res C-1

low density multifamily

0.75

0.6

-20%

35

35

0

15%

35%

1943

Residential

Res C-2

medium density multifamily

1.75

1.25

-29%

85

45

-40

15%

30%

1943

Residential

Res C-3

high density multifamily, mostly Harvard & MIT

3

3

0%

none

120

new

10%

20%

1943

Business

Bus. A

low dens. cmcl, scattered housing

1.75

1.25

-29%

85

45

-40

-

-

1943

Business

Bus. A-1

nghbd business housing uses in Bus. A-1

1

1

0%

35

35

0

-

-

1977

Business

Bus. A-2

north Mass Ave housing uses in Bus. A-1

1.75

1.25

-29%

45

45

0

-

-

1986

Business

Bus. B

Harvard, Central & Putnam Sqs, MIT

4

3

-25%

none

80

new

-

-

1943

Business

Bus. B-1

Mass Ave, Bay St area

3.25

2.5

-23%

90

55

-35

15%

15%

1983

Business

Bus. B-2

Mass Ave

3

2

-33%

90

55

-35

15%

15%

1983

Business

Bus. C

Porter Square

2

1

-50%

50

50

0

-

-

1977

Industrial

Ind. A

Boston Sand, Sherman St

2

1.25

-38%

55

55

0

-

-

1943

Industrial

Ind. A-1

N and E Cambridge

1.25

0.75

-40%

45

45

0

-

-

1978

Industrial

Ind. A-2

Lechmere, Broadway

4

3

-25%

70

70

0

-

-

1978

Industrial

Ind. B

between Central and Kendall Sqs

4

2.5

-38%

none

120

new

-

-

1943

Industrial

Ind. B-1

Binney St

3

2

-33%

70

70

0

-

-

1978

Industrial

Ind. B-2

Alewife Quadrangle

1.5

0.75

-50%

85

45

-40

-

-

1980

Industrial

Ind. C

W R Grace

1

0.5

-50%

55

55

0

-

-

1977

Office

Office-1

Broadway, Mt Auburn

0.75

0.6

-20%

35

35

0

15%

15%

1975

Office

Office-2

ADL, Alewife

2

1

-50%

85

85

0

15%

15%

1975

Office

Office-3

Mass Ave, riverfront

3

2

-33%

none

120

new

10%

10%

1943

Office

Office-3A

Kendall Sq / COM Energy

3

2

-33%

120

120

0

10%

10%

1978

Mixed

PUD2RC3A

E Cambridge riverfront

4

3

-25%

120

120

0

25%

25%

1978

Mixed

PUD3O3A

Kendall Sq, COM Energy

3

2.5

-17%

230

230

0

15%

15%

1978

Mixed

PUD5O2

Alewife

3

1.25

-58%

200

85

-115

15%

15%

1980

Mixed

MXD

Kendall Sq Redev Authority

2.5

2.5

0%

250

250

0

varies

varies

1981

                       

Note: for a full chart with all zones, please contact us.

           

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