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// CODE SNIPPET

Section 504 Building Height Modifications

NYC Building Code 2014 > 5 General Building Heights and Areas; Separation of Occupancies > 504 Building Height Modifications
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504.1 General

The heights permitted by Table 503 shall only be increased in accordance with this section.

Exception: The building height of one-story aircraft hangars, aircraft paint hangars and buildings used for the manufacturing of aircraft shall not be limited if the building is provided with an automatic fire-extinguishing system in accordance with Chapter 9 and is entirely surrounded by public ways or yards not less in width than one and one-half times the building height.

504.2 Automatic Sprinkler System Increase

Where a building is equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1, the value specified in Table 503 for maximum building height is increased by 20 feet (6096 mm) and the maximum number of stories is increased by one story. These increases are permitted in addition to the building area increase in accordance with Sections 506.2 and 506.3. For Group R buildings equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.2, the value specified in Table 503 for maximum building height is increased by 20 feet (6096 mm) and the maximum number of stories is increased by one story, but shall not exceed 60 feet (18 288 mm) or six stories, respectively.

Exceptions:
  1. Buildings, or portions of buildings, classified as a Group I-2 occupancy of Type IIB, III, IV or V construction.
  2. Buildings, or portions of buildings, classified as a Group H-1, H-2, H-3 or H-5 occupancy.
  3. Fire-resistance rating substitution in accordance with Table 601, Note d.

504.3 Rooftop Structures

buildings bulletin
Linked Resources Available

This section has been clarified by a buildings bulletin issued by the Department of Buildings.

Learn more in the Linked Resources panel on the right.
Rooftop structures including but not limited to roof tanks and their supports, ventilating, air conditioning, combined heat and power systems and similar building service equipment, bulkheads, penthouses, greenhouses, chimneys, and parapet walls 4 feet (1219 mm) or less in height shall not be included in the building height of the building or considered an additional story unless the aggregate area of all such structures, exclusive of any solar thermal and solar (photovoltaic) collectors and/or panels and their supporting equipment, exceeds 331/3 percent of the area of the roof of the building upon which they are erected. Rooftop structures shall be constructed in accordance with Section 1509.

Exception: Solar thermal and solar electric (photovoltaic) collectors and/or panels and their supporting equipment that exceed 331/3 percent of the area of the roof of the building upon which they are erected shall not be included in the height of a building or considered an additional story.

Related Code Sections


Section 504 General Building Heights and Areas; Separation of Occupancies, Building Height Modifications
The heights permitted by Table 503 shall only be increased in accordance with this section. Exception: The building height of one-story ...
NYC Building Code 2014 > 5 General Building Heights and Areas; Separation of Occupancies > 504 Building Height Modifications
506.1 General Building Heights and Areas; Separation of Occupancies, General
The building areas limited by Table 503 shall be permitted to be increased due to frontage ( I f ) and automatic sprinkler system protection ( I s ...
NYC Building Code 2014 > 5 General Building Heights and Areas; Separation of Occupancies > 506 Building Area Modifications > 506.1 General
506.4 General Building Heights and Areas; Separation of Occupancies, Single Occupancy Buildings With More Than One Story
for the occupancies on that story. Exceptions: Unlimited area buildings in accordance with Section 507. In Group R occupancies 6 stories or less in height ...
NYC Building Code 2014 > 5 General Building Heights and Areas; Separation of Occupancies > 506 Building Area Modifications > 506.4 Single Occupancy Buildings With More Than One Story
506.5 General Building Heights and Areas; Separation of Occupancies, Mixed Occupancy Area Determination
The total allowable building area for buildings containing mixed occupancies shall be determined in accordance with the applicable provisions ...
NYC Building Code 2014 > 5 General Building Heights and Areas; Separation of Occupancies > 506 Building Area Modifications > 506.5 Mixed Occupancy Area Determination
506.2.1 General Building Heights and Areas; Separation of Occupancies, Width Limits
The value of " W " shall be at least 20 feet (6096 mm). Where the value of W varies along the perimeter of the building, the calculation performed ...
NYC Building Code 2014 > 5 General Building Heights and Areas; Separation of Occupancies > 506 Building Area Modifications > 506.2 Frontage Increase > 506.2.1 Width Limits
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