// CODE SNIPPET
23-64 Basic Height and Setback Requirements
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R6 R7 R8 R9 R10
In the districts indicated without a letter suffix, for buildings other than Quality Housing buildings, the height and setback of a building or other structure shall be as set forth in Section 23-641 (Front setbacks), or 23-642 (Alternate front setbacks). In R9 and R10 Districts, towers are permitted in accordance with the provisions of Section 23-65.
R6 R7 R8 R9 R10
In the districts indicated without a letter suffix, if the front wall or other portion of a building or other structure is located at the street line or within the initial setback distance set forth in the following table, the height of such front wall or other portion of a building or other structure shall not exceed the maximum height above the street line set forth in the table. Above such specified maximum height and beyond the initial setback distance, the building or other structure shall not penetrate the sky exposure plane set forth in the table, except as otherwise provided in Sections 23-62 (Permitted Obstructions) or 23-65 (Tower Regulations).
MAXIMUM HEIGHT OF FRONT WALL AND REQUIRED FRONT SETBACKS
Initial Setback Distance (in feet) | Maximum Height of a Front Wall or other portion of a Building or Other Structure within the Initial Setback Distance | Sky Exposure Plane | |||||
Height above Street Line (in feet) | Slope over Zoning Lot (expressed as a ratio of vertical distance to horizontal distance) | ||||||
On Narrow Street | On Wide Street | ||||||
On Narrow Street | On Wide Street | Vertical Distance | Horizontal Distance | Vertical Distance | Horizontal Distance | ||
R6 or R7 Districts | |||||||
20 | 15 | 60 feet or six stories, whichever is less | 60 | 2.7 | to 1 | 5.6 | to 1 |
R8 R9 or R10 Districts | |||||||
20 | 15 | 85 feet or nine stories, whichever is less | 85 | 2.7 | to 1 | 5.6 | to 1 |

SKY EXPOSURE PLANE
R6 R7 R8 R9 R10 Districts
(23—641, 24—522, 33—432, 43—43)
R6 R7 R8 R9 R10
In the districts indicated without a letter suffix, if an open area is provided along the entire length of the front lot line with the minimum depth set forth in the table in this Section, the provisions of this Section may apply in lieu of the provisions of Section 23-641 (Front setbacks). The building or other structure shall not penetrate the sky exposure plane set forth in the table, except as otherwise provided in Sections 23-62 (Permitted Obstructions) or 23-65 (Tower Regulations).
In R9 or R10 Districts, the provisions of this Section shall be inapplicable to any development or enlargement with more than 25 percent of the total floor area of the building in residential use.
ALTERNATE REQUIRED FRONT SETBACKS
Depth of Optional Front Open Area (in feet, measured perpendicular to street line) | Alternate Sky Exposure Plane | |||||
Height above Street Line (in feet) | Slope over Zoning Lot (expressed as a ratio of vertical distance to horizontal distance) | |||||
On Narrow Street | On Wide Street | |||||
On Narrow Street | On Wide Street | Vertical Distance | Horizontal Distance | Vertical Distance | Horizontal Distance | |
R6 or R7 Districts | ||||||
15 | 10 | 60 | 3.7 | to 1 | 7.6 | to 1 |
R8 R9 or R10 Districts | ||||||
15 | 10 | 85 | 3.7 | to 1 | 7.6 | to 1 |

ALTERNATE SKY EXPOSURE PLANE
R6 R7 R8 R9 R10 Districts
(23—642, 24—53, 33—442, 43—44)
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