§ 23-732 Floor area ratio and open space ratio in R6 through R9 Districts
ZR § 23-732
R6 R7 R8 R9
In the districts indicated without a letter suffix, for sky exposure plane buildings, the minimum required open space ratio and the maximum floor area ratio for any zoning lot shall be determined by the height factor of such zoning lot as set forth in this Section. Where elected, such floor area ratio shall supersede the floor area ratio provisions of Section 23-22, and apply to all residences, including qualifying affordable housing or qualifying senior housing.
The minimum open space required through the application of a minimum open space ratio shall be applied in conjunction with the applicable regulations of Section 23-30 (YARDS, COURTS AND OTHER OPEN AREA REGULATIONS). The obstructions set forth in Section 23-311 shall per permitted in required open space.
MINIMUM REQUIRED OPEN SPACE RATIO AND MAXIMUM FLOOR AREA RATIO
R6 through R9 Districts
For zoning lots with a height factor of
In R6 Districts
In R7 Districts
In R8 Districts
In R9 Districts
Min. Req. Open Space Ratio
Max. Floor Area Ratio
1
27.5
0.78
15.5
0.87
5.9
0.94
1.0
0.99
2
28.0
1.28
16.0
1.52
6.2
1.78
1.4
1.95
3
28.5
1.62
16.5
2.01
6.5
2.51
1.8
2.85
4
29.0
1.85
17.0
2.38
6.8
3.14
2.2
3.68
5
29.5
2.02
17.5
2.67
7.1
3.69
2.6
4.42
6
30.0
2.14
18.0
2.88
7.4
4.15
3.0
5.08
7
30.5
2.23
18.5
3.05
7.7
4.55
3.4
5.65
8
31.0
2.30
19.0
3.17
8.0
4.88
3.8
6.13
9
31.5
2.35
19.5
3.27
8.3
5.15
4.2
6.54
10
32.0
20.0
3.33
8.6
5.38
4.6
6.85
11
32.5
2.40
20.5
3.38
8.9
5.56
5.0
7.09
12
33.0
2.42
21.0
3.41
9.2
5.71
5.4
7.30
13
33.5
2.43
21.5
3.42
9.5
5.81
5.8
7.41
14
34.0
22.0
3.44
9.8
5.92
7.52
15
34.5
22.5
10.1
5.95
6.6
16
35.0
23.0
10.4
5.99
7.0
17
35.5
23.5
3.40
10.7
6.02
18
36.0
24.0
11.0
7.8
7.46
19
36.5
2.39
24.5
3.36
11.3
8.2
20
37.0
25.0
11.6
7.35
21
37.5
2.36
25.5
3.30
11.9
9.0
7.25
For zoning lots with height factors greater than 21, the minimum required open space ratio shall be as set forth in the following table:
OPEN SPACE RATIO FOR HIGH BUILDINGS
District
Minimum Required Open Space Ratio at Height Factor of 21
Additional Required Open Space Ratio for each Additional Height Factor
R6
0.5
R7
R8
0.3
R9
0.4
For these zoning lots, the maximum floor area ratio shall be such as can be attained at the required open space ratio for the height factor.*
The floor area ratio attainable at a given height factor and a given open space ratio may be computed from the following formula:
