Local Law 152 gas piping inspections for NYC building owners, including the December 31, 2026 deadline

Which buildings must comply

The law covers all buildings except one- and two-family homes and other buildings classified in Occupancy Group R-3. A three-family house is generally covered, and the rules set a lower penalty for three-family buildings than for other buildings.

Buildings with the following Department of Finance building classifications do not need to comply: A0 through A9, B1, B2, B3, B9, CM, M3 (with two or fewer permanent dwelling units), M4 (with 20 or fewer occupants), N2, S0, S1, S2 and V. The classification appears on the building's property profile; if it is wrong, the owner can request a correction from the Department of Finance.

A building with no gas piping files a certification of no gas piping, signed by a registered design professional or a licensed master plumber. A building that has gas piping but no active gas service and no connected appliances files a utility statement and related documentation instead of an inspection.

Inspection deadlines by community district

The inspection year depends on the building's community district. The same district numbers apply in all five boroughs.

To find the community district, search the address on the Department of City Planning website. DOB also publishes an address search and a downloadable list of properties subject to Local Law 152 with their deadlines. A new building whose certificate of occupancy was issued on or after December 6, 2016 has its first inspection in the tenth year after the certificate was issued, then follows the district schedule.

An owner who cannot complete the inspection by the deadline may request a one-time 180-day extension, which carries a $35 filing fee. The inspection must still be completed before the extension expires.

Who performs the inspection

The inspection must be performed by a licensed master plumber, or by an individual holding a journeyman plumber registration who works under the direct and continuing supervision of a licensed master plumber and has completed a training program of at least seven classroom hours accepted by DOB. Owners can confirm that a plumber's license is active with the DOB License Search tool.

The inspecting plumber must notify DOB at least two days before the inspection. We schedule the inspection with our licensed partner master plumber, arrange access to every required space and coordinate any correction work that follows.

What the inspection covers

• Exposed gas piping from the point of entry into the building, including the meter area, through the point of connection to gas appliances.
• Exposed piping in public spaces, hallways, corridors, mechanical and boiler rooms and on rooftops.
• A combustible gas detector survey of the air along the presumed path of concealed piping in public spaces, hallways and corridors on floors with gas piping or gas equipment, up to the tenant space.
• Exposed gas piping and gas appliances in commercial tenant spaces, added by Local Law 142 of 2025. Spaces classified S0, S1 and S2 are excluded.
• Piping, appliances and connections inside dwelling units are not part of the inspection.

If access is not available to every required area, the inspection cannot be certified as complete, and the entire inspection must be repeated. Owners should arrange access to boiler rooms, meter rooms, roofs and commercial tenant spaces in writing before the inspection date.

Filing and correction deadlines

Since July 27, 2026, all Local Law 152 filings, including certifications, extension requests and inspection notifications, are submitted in DOB NOW: Safety, and the paper GPS2 is no longer required. Each certification, correction certification and extension request carries a $35 filing fee. A certification submitted more than 60 days after the inspection does not count, and a new inspection is required.

Common findings and gas shutoffs

• Atmospheric corrosion on older black steel piping, often in basements and meter areas.
• Connections that do not comply with code, such as flexible connectors run through walls or unpermitted dryer and range lines.
• Missing or inaccessible shutoff valves.
• Gas leaks detected at fittings or along the piping path.
• Minor non-hazardous items, such as bushings at meters, which the plumber notes in the comments of the filing.

When the inspection reveals an unsafe or hazardous condition, the plumber must immediately notify the owner, the gas utility and DOB, and the owner must correct the condition under any required permits. The utility may shut off and lock the gas supply until the condition is repaired.

Restoring gas generally requires the repair work under a DOB permit by a licensed master plumber, the related gas inspections and the utility's own restoration of service, and it can take several weeks. Buildings with a gas-fired boiler should schedule the inspection outside the heating season where the deadline allows, and owners should plan how tenants will be informed if service is interrupted.

Penalties, waivers and cost

Failure to file the certification by the due date can result in a civil penalty of $1,500 for a three-family building and $5,000 for other buildings. A penalty can be challenged in writing within 30 days with proof of a timely filing. Waivers are available in defined cases, including a new owner who acquired the building after the penalty was incurred, bankruptcy, a declared state of emergency, conversion or misclassification as R-3, demolition, a building sealed or vacated by government order, and permitted gas work in progress.

The cost of an inspection depends on the number of meters, risers and floors, the number of commercial tenant spaces and how easily each area can be reached. Correction work is priced separately, based on the findings. A building that plans to convert its boiler or cooking to electric may be able to remove its gas service before the deadline and file the no-gas documentation instead; DOB charges $375 for a certification of no gas piping and $480 for documentation of no gas service.

How we can help

We confirm the building's Local Law 152 deadline and classification, schedule the inspection with our licensed partner master plumber, coordinate access with tenants and building staff, and manage any corrections and the follow-up certification within the 120-day window. The inspection and certifications are signed and sealed by the licensed master plumber. For buildings considering electrification of a boiler or cooking equipment, we can price that work alongside the gas corrections.