NYC Local Law 157 Update (Natural Gas Detectors Deadline Extension, pdf, Section 28-315.2.4.1)

NYC Council Int. No. 1281-A (2025)

Subject: Extension and modification of deadlines for installing natural gas detectors in NYC buildings

1️⃣ New Installation Deadline

• The deadline to install approved natural gas detecting devices is extended to:

January 1, 2027 or might be January 1, 2029

• Applies to:

• • Residential buildings

  • Multiple dwellings

  • As required under NYC Administrative Code and NYC Building Code

2️⃣ Updated Code References

• Replaces prior reference to Section 908.10 of the Building Code.
• Now requires compliance with Section 908.13 (new section created).
• Updates Administrative Code sections to align with the new standard.

3️⃣ Class B Multiple Dwellings Option

Instead of individual unit alarms, Class B multiple dwellings may install:

• A line-operated zoned natural gas detection system
•  With:
  • Central annunciation
  • Central office tie-in
  • Coverage in public corridors and public spaces
• Subject to DOB and FDNY rules.

4️⃣ Market Availability Clause (Key Change)

By July 1, 2026, the Commissioner must determine whether:

• At least 4 distinct manufacturers produce compliant battery-powered natural gas alarms.

If fewer than 4 manufacturers are identified:

• The installation deadline automatically extends to:

January 1, 2029

5️⃣ Repeals

The law repeals:

• Sections 908.10, 908.10.1, and 908.10.2 of the NYC Building Code.

These are replaced by new Section 908.13, which establishes updated requirements for natural gas alarms.

6️⃣ Effective Date

• The law takes effect immediately upon enactment.

Practical Impact for NYC Property Owners (Strategic View)

• Current working compliance deadline: January 1, 2027

• Possible extension to January 1, 2029 depending on market availability.

• Compliance must follow new DOB-adopted standards under 908.13.

• Important for:

  • HPD-regulated properties

  • Landlords

  • Class B dwellings (hotels, SROs, etc.)

  • Compliance signage & safety vendors

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