Local Law 152 of 2016 requires periodic inspections of gas piping in most buildings in New York City. If you own or manage a multifamily, mixed-use, or commercial building in any of the five boroughs, it is worth knowing when your inspection is due and what the process involves.
Which buildings are covered
According to the NYC Department of Buildings (DOB), the gas piping inspection requirement applies to all buildings except one- and two-family homes and other buildings classified in occupancy group R-3. That means most apartment buildings, mixed-use buildings with stores below apartments, and commercial buildings are covered.
Buildings with no gas piping at all still have a filing obligation: the owner submits a one-time certification stating that the building does not contain a gas piping system. Buildings with gas piping that is not currently supplied with gas and has no connected appliances submit their own type of statement.
New buildings that received a certificate of occupancy on or after December 6, 2016 do not need their first inspection until the tenth year after the certificate of occupancy was issued, after which they join the regular cycle.
The four-year cycle by community district
Inspections are required at least once every four years, and the year is set by the building's community district. DOB publishes the schedule. Under the current cycle:
- Community districts 1, 3, and 10: 2024, then 2028
- Community districts 2, 5, 7, 13, and 18: 2025, then 2029
- Community districts 4, 6, 8, 9, and 16: 2026, then 2030
- Community districts 11, 12, 14, 15, and 17: 2027, then 2031
Community district numbers repeat across boroughs, so Community District 8 in Brooklyn and Community District 8 in the Bronx share the same year. You can look up your building's district through the NYC Department of City Planning. If your building is in a 2026 district, the deadline is December 31, 2026.
Who performs the inspection
The inspection must be done by a Licensed Master Plumber (LMP) or a qualified individual working under the LMP's direct and continuing supervision. The inspector examines exposed gas piping from the point of entry into the building, including the meter area and building piping, up to individual tenant spaces. Public spaces, hallways, corridors, and mechanical and boiler rooms are included. The inspector also checks for atypical gas odors, illegal connections, non-code-compliant installations, and signs of excessive corrosion.
Reports, certifications, and filing deadlines
After the inspection, the LMP provides the owner with an inspection report, which DOB recommends within 30 days. The owner must file the initial certification with DOB within 60 days of the inspection.
As of July 27, 2026, DOB moved LL152 filings into DOB NOW: Safety. The older GPS1 and GPS2 forms are no longer used or accepted. Initial certifications, certifications of correction, extension requests, and notices of unsafe conditions are all handled in DOB NOW: Safety. Owners should keep records of past filings.
If conditions need correcting
When the inspection finds conditions that need to be fixed, the inspection specifies the time needed to correct them, either 120 or 180 days. If 120 days was specified, the owner can request an extension up to the 180-day limit. Once corrections are made, a certification of correction is filed.
If the inspector finds a gas leak or a hazardous condition, the utility and DOB must be notified right away, and the gas may be shut off until repairs are made. Getting gas back after a shutoff involves repairs, a pressure test, DOB inspection and Gas Authorization, and a utility inspection. We explain that process in our guide to restoring gas after a shutoff.
Practical tips for owners and managers
- Find your community district now and put the deadline on your calendar.
- Schedule the inspection early in your cycle year, so there is time to make corrections before December 31.
- Give tenants notice and arrange access to meter rooms, boiler rooms, and any spaces the inspector needs to see.
- Keep copies of every report and filing in one place.
- Budget for possible corrections such as replacing corroded sections, adding supports, or removing abandoned piping.
Why it matters
LL152 was created to find problems such as corrosion, leaks, and illegal connections before they cause an emergency. Owners who miss the filing can face penalties, and an unplanned gas shutoff is disruptive for everyone in the building. Planning ahead is the easiest way to avoid both.
For owners across Manhattan, Brooklyn, Queens, the Bronx, and Staten Island, LL152 is now a routine part of running a building. Check the official DOB Gas Piping Inspection page and the LL152 FAQs for the latest details.
Need help with this?
If your building is due for an LL152 inspection or has corrections to complete, we can help you plan the work and coordinate with the licensed professionals involved. Valley Brothers Construction works across all five boroughs of New York City (Manhattan, Brooklyn, Queens, The Bronx, and Staten Island), plus Nassau County and Suffolk County on Long Island. Call 516-737-4713 or 516-300-2199, or request a free estimate.
This article is general information for property owners, not legal or engineering advice. Rules and procedures change; confirm current requirements with the agency or utility involved.