File #: Int 1352-2025    Version: * Name: Drainage location of certain building roofs.
Type: Introduction Status: Committee
Committee: Committee on Housing and Buildings
On agenda: 8/14/2025
Enactment date: Law number:
Title: A Local Law to amend the New York city plumbing code, in relation to the drainage location of certain building roofs
Sponsors: James F. Gennaro
Council Member Sponsors: 1
Summary: This bill would require that roofs on covered buildings drain onto a permeable surface in accordance with DEP rulemaking. Covered buildings would be residential buildings that are served by the combined sewer system and located on lots where the front yard area is at least 20 percent of the lot coverage area. Buildings in the 10-year rainfall flood risk area and certain other buildings would be exempt.
Indexes: Agency Rule-making Required
Attachments: 1. Summary of Int. No. 1352, 2. Int. No. 1352, 3. August 14, 2025 - Stated Meeting Agenda

Int. No. 1352

 

By Council Member Gennaro

 

A Local Law to amend the New York city plumbing code, in relation to the drainage location of certain building roofs

 

Be it enacted by the Council as follows:

 

                     Section 1. Section 1101.2 of the New York city plumbing code, as added by local law number 14 for the year 2020, is amended to read as follows:

1101.2 Where required. All [roofs,] paved areas, yards, courts, [and] courtyards, and roofs, other than those roofs subject to Section 1101.2.5 of this code, shall drain into a separate storm sewer system, or a combined sewer system, or to a place of disposal approved by the commissioner and in accordance with the requirements of the Department of Environmental Protection. An approved system for beneficial collection and use of storm water may be installed, in which case overflow from such a system shall be discharged to a safe location subject to the approval of the commissioner and the Department of Environmental Protection. See Section 107.6.2 of this code for required construction documents relating to provisions for discharge for stormwater runoff.

                     § 2. Section 1101.2 of the New York city plumbing code is amended by adding a new section 1101.2.5 to read as follows:

1101.2.5 Roof drainage location. The roof of any residential building located within an area served by a combined sewer, and where the area of the building front yard, as defined in Section 12-10 of the New York City Zoning Resolution, is at least 20 percent of lot coverage multiplied by the lot area, as those terms are defined in Section 12-10 of the New York City Zoning Resolution, shall drain towards the street and onto a permeable surface exterior to the building in accordance with the rules of the Department of Environmental Protection.

 

Exceptions:

 

1. A residential building located in the 10-year rainfall flood risk area as defined in Section 24-809 of the Administrative Code.

 

2. A residential building for which the Department of Environmental Protection or the Department of Buildings determines that compliance with this section would pose a threat to health, safety, or property, including but not limited to a building located in an area with a high groundwater level.

                     § 3. This local law takes effect 180 days after it becomes law.AGB

LS #18633

6/16/2025 9:30am