Local Law 152 Gas Piping Inspections in NYC

Local Law 152 of 2016 is a NYC gas-safety law requiring periodic
inspections of the gas piping systems in many buildings. DOB requires gas piping
systems in all buildings to be inspected by a NYC Licensed Master Plumber (or a
qualified individual working under an LMP) at least once every four years, based on
the building’s Community District — except one- and two-family
homes and other buildings classified in Occupancy Group R-3. This is a
building gas-piping compliance inspection and filing, not a routine
appliance hookup, leak repair, or boiler inspection. Missing the filing can result
in a $5,000 civil penalty.
This article is general information, not legal advice. LL152 cycle dates and
rules change — verify your building’s current deadline with DOB. If a
gas leak or unsafe condition is found, treat it as an emergency.

Which filing category applies to your building #

• Gas piping + active gas service — the standard case: an LMP inspects the system, provides an inspection report to the owner within 30 days, and the owner submits the Gas Piping System Periodic Inspection Certification (GPS2) to DOB within 60 days of inspection.
• No gas piping — if LL152 applies but the building has no gas piping, a GPS2 certification stating so must be signed and sealed by a Registered Design Professional or LMP (per DOB’s 2026 update, this no-gas certification is now required only once rather than every cycle, and may also come from a utility).
• Gas piping but no active gas service — if the building has piping but no supplied gas and no connected appliances, documentation (a utility statement and an owner statement) is submitted through the online portal; the utility statement must be submitted every cycle.
• Defects requiring correction — identified conditions must be corrected under the Construction Codes (with permits where required), and a follow-up GPS2 certification of correction is due within 120 days of inspection (or 180 days if more time is needed).
• Extension — a one-time 180-day extension of the cycle deadline may be requested; the inspection must occur during the extension, with GPS2 filed within 60 days of inspection.

Inspection cycle schedule (by Community District) #

Deadlines are set by Community District. DOB’s current sub-cycle schedule:

• Sub-cycle A (CDs 1, 3, 10) — Cycle 2 due Dec 31, 2024; Cycle 3 due Dec 31, 2028.
• Sub-cycle B (CDs 2, 5, 7, 13, 18) — Cycle 2 due Dec 31, 2025; Cycle 3 due Dec 31, 2029.
• Sub-cycle C (CDs 4, 6, 8, 9, 16) — Cycle 2 due Dec 31, 2026; Cycle 3 due Dec 31, 2030.
• Sub-cycle D (CDs 11, 12, 14, 15, 17) — Cycle 2 due Dec 31, 2027; Cycle 3 due Dec 31, 2031.

The 2026 window is Sub-cycle C — Community Districts 4, 6, 8, 9, and 16 —
with a December 31, 2026 due date. Always confirm your building’s current
deadline with DOB, as cycles and rules are periodically updated.
(NYC DOB)

What the inspection covers #

The inspection covers exposed gas piping from the point of entry
into the building — including building service meters — and gas piping in
public spaces, hallways, corridors, mechanical and boiler rooms, exterior areas, and
rooftops. “Exposed” means open to view; it does not include piping above a
drop ceiling, behind an access door, or buried underground. LL152 does not
include gas piping within tenant spaces, though the leak survey may take
readings up to the entry of tenant spaces. The plumber must also conduct a leak
survey using a combustible gas detector in all areas where visual inspection of
exposed piping is required. If access to required areas is not provided, the plumber
should not certify the inspection as complete.
(NYC DOB — LL152 FAQs)

Reporting and filing deadlines #

• LMP provides inspection report to owner — within 30 days of inspection.
• Owner submits GPS2 certification to DOB — within 60 days of inspection (and by the cycle deadline).
• Certification of correction — within 120 days of inspection, or 180 days if additional correction time was needed.
• Extension — one-time 180-day extension of the cycle deadline.
• Failure to file — civil penalty may be $5,000.

LL152 is codified in NYC Admin. Code Article 318 of Chapter 3 of Title 28, with DOB
rules in 1 RCNY §103-10. Local Law 142 of 2025 and amendments to 1 RCNY
§103-10 and §101-03 (effective early 2026) changed and clarified some
requirements. DEP does not administer LL152 — the primary parties are DOB, the
Licensed Master Plumber, the gas utility, and the building owner. Unsafe or hazardous
conditions found during inspection must be reported immediately to the owner, the
utility, and DOB.

Compliance checklist for NYC building owners #

1. Confirm whether LL152 applies (check occupancy and building classification).
2. Identify the building’s Community District — the deadline depends on it.
3. Confirm whether the building has gas piping (no-gas buildings use a different certification).
4. Confirm whether gas service is active (inactive service requires utility and owner documentation).
5. Hire a qualified Licensed Master Plumber and verify license status before scheduling.
6. Provide access to all required areas: basements, meter/boiler/mechanical rooms, public corridors, exterior areas, rooftops, and commercial service areas.
7. Allow time for defects — corrections may require permits, repair, and reinspection.
8. Receive the inspection report within 30 days, and submit GPS2 within 60 days and by the cycle deadline.
9. Correct and certify any defects under the 120-day or 180-day rules where applicable.
10. Keep records (reports, GPS2, correction documents, utility correspondence, proof of filing) and plan the next four-year cycle.

Sources #

• NYC DOB — Gas Piping Inspections (LL152)
• NYC DOB — LL152 FAQs
• Local Law 152 of 2016 (text)
• NYC 311 — GPS2 Certification