Everything building owners, property managers, and boards need to know about the four-year gas piping inspection cycle, GPS1 and GPS2 filings, the 2026 community district deadlines, and how to avoid penalties.
If you own or manage a building in New York City with gas service, Local Law 152 puts you on a recurring four-year inspection clock. Nearly 287,000 buildings across the five boroughs fall under the law, and the deadline that applies to your building depends entirely on which community district it sits in.
This guide covers everything you need to stay compliant, from the current inspection schedule to the difference between the GPS1 and GPS2 forms, the real penalty amounts (which changed since the law first took effect, and which many websites still quote incorrectly), and what to do if your building has no gas at all.
Local Law 152 of 2016 requires periodic inspection of exposed gas piping systems in almost every building in New York City. The City Council enacted it as part of a package of gas safety laws following deadly gas explosions in East Harlem (2014) and the East Village (2015), with the goal of catching corroded, illegally modified, or leaking gas piping before it becomes catastrophic.
Under the law, a Licensed Master Plumber, or a qualified individual working under one, must inspect the building's gas piping system at least once every four years. The results flow through two documents: an inspection report to the owner (GPS1) and a certification filed with the Department of Buildings (GPS2).
LL152 applies to all NYC buildings except one- and two-family homes and other buildings classified in Occupancy Group R-3. That means commercial buildings, multifamily residential buildings, mixed-use properties, institutional buildings, and industrial properties are all covered.
You do not need to comply if your building carries one of these Department of Finance building classifications: A0 through A9, B1, B2, B3, B9, CM, M3 (with 2 or fewer permanent dwelling units), M4 (with 20 or fewer occupants), N2, S0, S1, S2, or V. You can confirm your building classification on the Property Profile in the DOB's Buildings Information System (BIS).
The four-year cycle is staggered by community district, not by borough. The district numbers apply across all five boroughs, so Community District 8 in Manhattan, Brooklyn, Queens, the Bronx, and Staten Island are all due in the same year.
| Sub-cycle | Community Districts (all boroughs) | Current Cycle Due Date | Next Cycle |
|---|---|---|---|
| A | 1, 3, 10 | Completed (Dec 31, 2024) | 2028 |
| B | 2, 5, 7, 13, 18 | Completed (Dec 31, 2025) | 2029 |
| C | 4, 6, 8, 9, 16 | December 31, 2026 | 2030 |
| D | 11, 12, 14, 15, 17 | December 31, 2027 | 2031 |
Your community district is not the same as your zip code, council district, or school district. The fastest ways to confirm it:
If you manage a portfolio spread across multiple districts, map every building's sub-cycle now. Portfolios routinely have buildings due in three different years, and a missed building is a $5,000 problem.
The inspection must be conducted by a NYC Licensed Master Plumber (LMP), or by a qualified individual holding specific certifications who works under the direct and continuing supervision of an LMP. This is different from many other NYC compliance inspections: a professional engineer or registered architect cannot perform an LL152 gas piping inspection (their role is limited to certifying buildings with no gas piping).
Before hiring, verify the LMP's license is active using the DOB License Search tool, and check their disciplinary history with the Know Your Construction Professional tool. The DOB explicitly encourages both checks.
LL152 compliance runs on two forms with different destinations and deadlines. Confusing them is one of the most common compliance mistakes, and plenty of websites get this wrong.
| Form | What It Is | Who Receives It | Deadline |
|---|---|---|---|
| GPS1 | Gas Piping System Periodic Inspection Report: the LMP's findings | The building owner | Within 30 days of the inspection |
| GPS2 | Gas Piping System Periodic Inspection Certification: signed and sealed by the LMP | DOB, via the online portal | Within 60 days of the inspection |
If you cannot get the inspection done by your reporting year's deadline, DOB allows a one-time 180-day extension request through the online portal, but the inspection must happen before the extension expires.
Failure to file a Gas Piping System Periodic Inspection Certification by the applicable due date may result in a civil penalty of $5,000. The penalty was originally set at $10,000 when the law took effect, and was reduced by amendment in 2021. Many compliance websites still quote the old $10,000 figure.
Beyond the civil penalty, an unresolved gas piping deficiency carries risks that dwarf the fine: utility service interruption if unsafe conditions are reported, liability exposure if an incident occurs in a building with a lapsed inspection, and complications at refinance or sale when compliance records are pulled.
The LL152 inspection is a visual inspection of the exposed gas piping in the building's public and common spaces. The LMP examines:
The inspection does not include piping concealed inside walls or piping within individual tenant units. It typically takes one to three hours depending on building size and how accessible the piping runs are.
If the building contains no gas piping, a GPS2 certification stating that fact, signed and sealed by a Registered Design Professional (PE or RA) or a Licensed Master Plumber, must be submitted to DOB. Once filed, no further action is needed for that cycle.
If the building has piping but currently receives no gas service and has no appliances connected, you must submit two documents through the DOB portal: a signed statement from the utility with the date gas service ended, and a signed owner statement certifying the building no longer receives gas and has no connected appliances. Before ever restoring gas service, the owner must bring in an LMP, obtain permits, pass gas-related inspections, and file a fresh GPS2.
If the inspection reveals an unsafe or hazardous condition, the LMP must immediately notify the building owner, the utility providing gas service, and DOB. The owner must then take immediate action to correct the condition in compliance with the NYC Construction Codes, including pulling any required work permits.
For less severe findings, "conditions requiring correction," the timeline is the 120-day correction certification described above (or 180 days where additional time was flagged on the initial GPS2). Corrections must be performed by licensed professionals with proper permits; LL152 corrections are real plumbing work, not paperwork.
For a typical small-to-midsize NYC building, LL152 inspections generally run from a few hundred dollars to over a thousand, driven by four factors: the size of the building and length of exposed piping runs, the number of meter rooms and risers, accessibility (locked cellars, tenant coordination), and whether the GPS2 filing is included or billed separately.
Watch for quotes that exclude the DOB filing. The GPS2 certification is where the compliance deadline actually lives, and a cheap inspection that leaves the filing to you is a false economy. Insparisk quotes include inspection coordination, the GPS1 report, and the GPS2 filing as one package. Request a quote for portfolio or single-building pricing.
Community Districts 4, 6, 8, 9, and 16 in all boroughs are due in the current cycle between January 1 and December 31, 2026. Your next inspection after that will be due in 2030.
GPS1 is the inspection report the Licensed Master Plumber delivers to the building owner within 30 days of the inspection. GPS2 is the certification, signed and sealed by the LMP, that the owner must file with DOB within 60 days of the inspection. Only the GPS2 goes to DOB.
Failure to file the GPS2 certification by the applicable due date may result in a civil penalty of $5,000. The penalty was originally $10,000 and was reduced by amendment in 2021. DOB began issuing Notices of Deficiency for Cycle 1 non-filers in January 2025.
No. The inspection itself must be performed by a Licensed Master Plumber or a qualified person under an LMP's supervision. A PE or RA may only sign the certification for a building that contains no gas piping.
No. The inspection covers exposed gas piping from the point of entry through public and common spaces. Piping within individual tenant or dwelling units is excluded.
DOB allows a one-time 180-day extension requested through its online portal, but the inspection must be completed before the extension period expires. Requesting an extension is far better than missing the deadline outright.
Insparisk coordinates the Licensed Master Plumber inspection, delivers your GPS1 report, and files the GPS2 certification with DOB. One call covers the whole obligation.
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