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Local Law 157

What owners and managers need to know.

  • Requirement: Mandates the installation of natural gas detectors in all residential buildings across New York City.

  • Compliance Deadline: January 1, 2027 

  • Approved Standards: Detectors must comply with UL 1484 standards and align with NFPA 715 guidelines.

  • Placement Rules: Units must be placed within 12 inches of the ceiling and between 3 and 10 feet horizontally from gas appliances

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Residential Focus

Private dwellings and Class A / Class B multiple dwellings are addressed by the rules.

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Placement Matters

Where a gas-burning appliance is in a dwelling, the alarm generally belongs in that room, 3–10 feet away and within 12 inches of the ceiling.

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Listed Equipment 

Natural gas alarms must meet the applicable listing and labeling requirements, including UL 1484.

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Local Law 157

Answers to your questions. 

A straightforward guide to New York City’s natural gas alarm requirements: who is covered, where alarms go, what equipment qualifies, who can install them, and what owners should prepare before the current compliance date.

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