Local Law 152 of 2016 requires periodic inspections of the gas piping in most NYC buildings. A Licensed Master Plumber does the inspection. The owner then has to get the right certifications to the Department of Buildings (DOB) on time. Since July 27, 2026, every LL152 submission goes through DOB NOW: Safety, which replaced the old online GPS2 portal.
Is your building covered?
LL152 applies to every building except one- and two-family homes and other buildings in Occupancy Group R-3. DOB uses the Department of Finance building classification to decide this. DOB’s gas piping page lists the classes that don’t need to comply. To check a specific building, DOB offers an “LL152 Gas Piping System Compliance” lookup (under Additional Tools on the DOB NOW public portal) and a downloadable spreadsheet of covered properties.
New buildings: if DOB issued the building’s first temporary, interim or final Certificate of Occupancy on or after December 6, 2016, the first inspection isn’t required until the tenth year after that C of O. After that, the building follows its Community District’s cycle.
When the inspection is due
Each building is inspected at least once every four years. The year depends on the building’s Community District, which you can look up on the Department of City Planning’s website. The deadline is December 31 of the cycle year.
| Sub-cycle | Community Districts | Cycle 2 | Cycle 3 |
|---|---|---|---|
| A | 1, 3, 10 | 2024 | 2028 |
| B | 2, 5, 7, 13, 18 | 2025 | 2029 |
| C | 4, 6, 8, 9, 16 | 2026 | 2030 |
| D | 11, 12, 14, 15, 17 | 2027 | 2031 |
If the inspection can’t be done by the deadline, the owner can request a one-time 180-day extension per cycle. The inspection then has to be done within the extension period.
Who inspects
The inspection is done by a Licensed Master Plumber (LMP) or a qualified person working under an LMP’s direct and continuing supervision. Under Local Law 142 of 2025 (effective February 22, 2026), that person must hold a DOB journeyman plumber registration and must have completed DOB-approved training. The inspecting entity must notify DOB at least two days before the inspection.
If the inspection finds an unsafe or hazardous condition, the LMP must immediately notify the owner, the gas utility and DOB. The owner must act right away to correct it, including getting any required work permits.
The paperwork, step by step
- GPS1 report: within 30 days of the inspection, the LMP gives the owner the inspection report.
- Initial certification: within 60 days of the inspection, the owner submits a certification, signed and sealed by the LMP who did or supervised the inspection. It is filed in DOB NOW: Safety.
- Certification of correction: if the inspection found conditions that need correcting, a certification that they were corrected is due within 120 days of the inspection, or 180 days if the initial certification said more time was needed.
- No gas piping in the building: submit a one-time certification saying so. It can come from a registered design professional, an LMP or the utility.
- Gas piping, but no gas service and no connected appliances: submit the utility’s statement, with the last date gas was supplied and the date service ended, plus the owner’s statement. This is now required every cycle.
DOB now charges filing fees for these submissions in DOB NOW: Safety; see DOB’s notice for the current amounts. DOB says failing to file the certification by the due date may result in a civil penalty of $5,000 (DOB Gas Piping Inspection page, checked October 7, 2026). DOB also issues violations to owners who miss a cycle.
What we do
S & M Expediting is a Class 2 filing representative and NYC-certified M/WBE, with more than 75 years of combined NYC expediting experience. We handle Local Law 152 gas piping filings:
- confirm whether the building is covered, and find its Community District and cycle
- prepare the DOB NOW: Safety submissions: initial certification, certification of correction, extension requests, and the no-gas-piping or no-gas-service filings
- track the 60-, 120- and 180-day windows after the inspection, so the certifications are filed on time
- check the DOB record afterward, and help clear any LL152 violation
We don’t perform the inspection; a Licensed Master Plumber does. If the inspection turns up corrective work, it may need permits; see plumbing permits in New York City and DOB violations on plumbing jobs.
Who does the inspection and the repairs
We will work with the contractor you have, or if not, we will recommend one from our network.
Contact us with the building address to check its LL152 status.
