Learn about Local Law 157 compliance for new developments in NYC. Understand gas detection requirements, cost-effective compliance options, and how to prepare before the May 1, 2025* deadline.
New York City’s Local Law 157 sets new safety requirements for gas detection in certain residential buildings, with a key compliance deadline of May 1, 2025*. The regulation outlines different requirements for buildings with a Temporary Certificate of Occupancy (TCO) issued after January 1, 2025, offering two options to comply: a traditional wired system or a cost-effective battery-powered Smart detector. As gas leaks pose serious risks, compliance with Local Law 157 ensures enhanced gas detection measures protecting residents and properties.
Buildings that received a Temporary Certificate of Occupancy (TCO) before January 1st, 2025 can install any UL-listed and labeled gas detector to comply with Local Law 157. However, buildings receiving their TCO after January 1, 2025, must install either a hardwired UL-listed and labeled gas detector or a Smart, battery-powered gas detector that is part of a monitored system.
For most buildings, the battery-powered smart detector offers a more affordable and efficient path to compliance, avoiding complex electrical work while enhancing safety with real-time monitoring.
With the May 1, 2025* deadline approaching, ensuring compliance with Local Law 157 is crucial for new developments and existing buildings. Choosing the right gas detection system, whether the cost-effective Smart Gas Detector or the hardwired option, can help streamline the process and enhance building safety.
To prepare, check out our Local Law 157 Compliance Checklist and ensure your property meets the latest requirements.
*Enforcement of Local Law 157 has been delayed until January 1, 2027, per legislation recently passed by the NYC Council Int. 1281-2025. This change is pending final approval by the Mayor.
New York City’s Local Law 157 sets new safety requirements for gas detection in certain residential buildings, with a key compliance deadline of May 1, 2025*. The regulation outlines different requirements for buildings with a Temporary Certificate of Occupancy (TCO) issued after January 1, 2025, offering two options to comply: a traditional wired system or a cost-effective battery-powered Smart detector. As gas leaks pose serious risks, compliance with Local Law 157 ensures enhanced gas detection measures protecting residents and properties.
Buildings that received a Temporary Certificate of Occupancy (TCO) before January 1st, 2025 can install any UL-listed and labeled gas detector to comply with Local Law 157. However, buildings receiving their TCO after January 1, 2025, must install either a hardwired UL-listed and labeled gas detector or a Smart, battery-powered gas detector that is part of a monitored system.
For most buildings, the battery-powered smart detector offers a more affordable and efficient path to compliance, avoiding complex electrical work while enhancing safety with real-time monitoring.
With the May 1, 2025* deadline approaching, ensuring compliance with Local Law 157 is crucial for new developments and existing buildings. Choosing the right gas detection system, whether the cost-effective Smart Gas Detector or the hardwired option, can help streamline the process and enhance building safety.
To prepare, check out our Local Law 157 Compliance Checklist and ensure your property meets the latest requirements.
*Enforcement of Local Law 157 has been delayed until January 1, 2027, per legislation recently passed by the NYC Council Int. 1281-2025. This change is pending final approval by the Mayor.
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