(3/22/16)
R1 R2 R3 R4 R5
In R1 and R2 Districts with a letter suffix and R3 through R5 Districts, the maximum #lot coverage#, minimum #open space# and maximum #floor area ratio# shall be as set forth in the following table:
| District | Maximum #Lot Coverage# (in percent) |
Minimum Required #Open Space# (in percent) |
Maximum #Floor Area Ratio# |
|---|---|---|---|
| R1-2A | 30 | 70 | .50 |
| R2A | 30 | 70 | .50 |
| R2X | N/A governed by | #yard# requirements | .85 |
| R3-1 R3-2 | 35 | 65 | .50 |
| R3A R3X | N/A governed by | #yard# requirements | .50 |
| R4 | 45 | 55 | .75 |
| R4-1 R4A | N/A governed by | #yard# requirements | .75 |
| R4B | 55 | 45 | .90 |
| R5 | 55 | 45 | 1.25 |
| R5A | N/A governed by | #yard# requirements | 1.10 |
| R5B | 55 | 45 | 1.35 |
| R5D | 60* | 40* | 2.00 |
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* For #corner lots#, the maximum #lot coverage# shall be 80
percent and the minimum required #open space# shall be 20
percent
In addition, the following rules shall apply:
- In R2X, R3, R4, R4A and R4-1 Districts, except R3, R4A and R4-1 Districts within #lower density growth management areas#, the #floor area ratio# in the table in this Section may be increased by up to 20 percent provided that any such increase in #floor area# is located directly under a sloping roof which rises at least three and one half inches in vertical distance for each foot of horizontal distance and the structural headroom of such #floor area# is between five and eight feet.
- In R3, R4-1 and R4A Districts in #lower density growth management areas#, the #floor area ratio# in the table in this Section may be increased by up to 20 percent provided that any such increase in #floor area# is located in any portion of a #building# covered by a sloping roof that rises at least seven inches in vertical distance for each foot of horizontal distance.
- In R3, R4 and R5 Districts, the permitted #floor area# of a #single-# or #two-family detached# or #semi-detached residence developed# after June 30, 1989, may be increased by up to 300 square feet if at least one enclosed #accessory# off-street parking space is provided in a garage located, wholly or partly, in the #side lot ribbon# pursuant to Sections 23-12 (Permitted Obstructions in Open Space), paragraph (e), 23-441 (Location of garages in side yards of corner lots) or 23-442 (Location of garages in side yards of other zoning lots).
- In R1-2A Districts and in R3, R4-1 and R4A Districts within #lower density growth management areas#, the permitted #floor area# of a #single-# or #two-family detached# or #semi-detached residence# may be increased by up to 300 square feet for one parking space and up to 500 square feet for two parking spaces provided such spaces are in a garage located, wholly or partly, in the #side lot ribbon# pursuant to Sections 23-12, paragraph (e), 23-441 or 23-442, except that in R1-2A Districts, such parking spaces need not be located in the #side lot ribbon#.
- In R2A Districts, the permitted #floor area# may be increased by up to 300 square feet for a detached garage located in a #rear yard#, except where a parking space is provided within a #building# containing #residences#.
- In R3 Districts, except for #zoning lots# containing #single-#, #two-#, or three-#family residences#, 50 percent of the required #open space# on a #zoning lot#, except such #open space# in a #front yard#, shall have a minimum dimension of 12 feet and shall not be used for driveways, private streets, open or enclosed #accessory# off-street parking spaces or open or enclosed #accessory# off-street loading berths.
- In R4 and R5 Districts, except for #zoning lots# containing #single-#, #two-# or three-#family residences#, 33 percent of the required #open space# on a #zoning lot#, except such #open space# in a #front yard# or, in R5D Districts, the open area between the #street line# and #street wall# of a #building# or its prolongation, shall have a minimum dimension of 12 feet and shall not be used for driveways, private streets, open or enclosed #accessory# off-street parking spaces, or open or enclosed #accessory# off-street loading berths.