Mandatory Gas Piping Compliance
Local Law 152 Gas Piping Inspections in NYC
Local Law 152 of 2016 requires the owners of most NYC buildings to have their gas piping systems periodically inspected by a Licensed Master Plumber. The inspection cycle runs every four years, assigned by community district, with deadlines that can result in DOB violations and civil penalties for owners who miss them. An LMP must inspect the system, prepare a GPS1 report, and seal it — and if deficiencies are found, corrective work must be performed before the GPS2 certification can be submitted to DOB.
Austin Plumbing & Heating performs LL152 gas piping inspections, prepares all required documentation, and handles corrective gas piping work when deficiencies are identified. One call closes the loop.
What Local Law 152 Requires
Local Law 152 mandates that building owners of covered properties — all buildings except one- and two-family homes not containing a fuel gas piping system — have their gas piping systems inspected every four years by a Licensed Master Plumber or a qualified individual under LMP supervision.
The inspection cycle is staggered across community districts. Missing your assigned window results in a DOB violation, with penalties that escalate significantly for continued non-compliance.
What the Inspection Covers
A thorough LL152 inspection examines:
- All exposed gas piping throughout the building, from the point of entry to each appliance connection
- Conditions at meters, regulators, and manual shutoffs
- Flexible gas connectors — hoses, corrugated stainless steel tubing (CSST)
- Gas appliance connections and accessible piping behind appliances
- Evidence of physical damage, corrosion, improper materials, or code deficiencies
- Gas valve and shutoff accessibility
The LMP documents the inspection on the GPS1 (Gas Piping System Periodic Inspection Report), which must be provided to the building owner within 30 days. The building owner then has 60 days to submit the GPS2 certification to DOB, signed and sealed by the inspecting LMP.
What Happens When Deficiencies Are Found
If the inspection reveals unsafe or non-compliant conditions, the LMP issues a deficiency finding. Unsafe conditions must be reported to Con Edison or National Grid, which can trigger a gas shutoff until corrective work is completed. Less severe deficiencies must be corrected within a defined period and re-inspected before the GPS2 can be certified.
This is where Austin Plumbing's full-service model matters: we inspect, identify the deficiency, perform the corrective gas piping work, conduct the follow-up pressure testing, and certify the GPS2. You don't need to find a separate plumber to do the repairs.
Penalties for Non-Compliance
Missing an LL152 inspection deadline or failing to submit the GPS2 results in a DOB violation. Civil penalties for LL152 non-compliance are substantial — the law was designed with meaningful financial consequences to drive compliance across NYC's aging gas infrastructure.
How to Know When Your Building Is Due
LL152 inspection schedules are organized by community district on a 4-year rolling cycle. Your due date is determined by your building's address and community district assignment — check yours below.
Free LL152 deadline lookup
When is your building's gas piping inspection due?
LL152 deadlines run on a four-year cycle assigned by community district, not borough. Search your neighborhood — or pick your borough and district — to see your inspection window.
Not sure of your community district? Look up your address on the NYC Planning community-district lookup.
Schedule per the NYC DOB periodic gas piping inspection cycle, current as of July 2026. Deadlines can change — DOB's published schedule controls. One- and two-family homes without a fuel-gas piping system are exempt.
If you're unsure whether your building's GPS2 is current, contact us with your building address and we'll confirm whether your GPS2 has been filed, when your next inspection window opens, and whether any corrective work from a prior inspection remains open. For the full schedule background, see our LL152 deadlines by community district guide.
CSST Gas Piping and LL152 Compliance
Corrugated Stainless Steel Tubing (CSST) is a flexible gas piping material installed in many NYC buildings during renovations in the 1990s and 2000s. It's faster to install than rigid black iron pipe and became widely used during that era. The problem is that early CSST installations often lacked the bonding and grounding requirements mandated by the NYC Plumbing Code — requirements that exist because CSST is vulnerable to lightning-induced electrical arcing that can perforate the tubing and cause gas leaks or fires.
During LL152 inspections, non-compliant CSST is one of the most common deficiency findings we see, particularly in Queens and Brooklyn buildings renovated between 1995 and 2010. If your building has CSST, a pre-inspection assessment can identify bonding and grounding gaps before the formal LL152 inspection window — avoiding a deficiency finding and a potential gas shutoff.
FAQ
Frequently Asked Questions
What is Local Law 152 and does it apply to my building?
Local Law 152 of 2016 requires the owners of most NYC buildings to have their gas piping systems inspected by a Licensed Master Plumber every four years. The inspection schedule is organized by community district on a rolling cycle. LL152 applies to virtually all buildings except one- and two-family homes that don't have a fuel gas piping system. If your building has gas service to multiple units, or is a multifamily or commercial building, it almost certainly falls under LL152. Missing your assigned inspection window results in a DOB violation, with civil penalties that escalate for continued non-compliance.
What happens if my building fails a Local Law 152 gas inspection?
When an LMP identifies deficiencies during an LL152 inspection, they are categorized by severity. Unsafe conditions must be reported to the utility (Con Edison or National Grid) immediately, which can trigger a gas shutoff until corrective work is completed and the system passes a pressure test. Less critical deficiencies must be corrected within a specified period before the GPS2 certification can be submitted to DOB. We perform the inspection, identify any deficiencies, perform the corrective gas piping work, conduct the follow-up pressure test, and certify the GPS2 — all in one engagement. You don't need to find a separate plumber to handle repairs.
Con Edison shut off my gas. How quickly can service be restored?
Gas restoration timelines depend on the scope of corrective work required. For minor issues — a failed flexible connector or an improperly installed appliance connection — corrective work and utility coordination can sometimes happen within a day or two. For more extensive work like a full gas line replacement or significant rerouting, the timeline is longer. What doesn't change is our priority for gas shutoff cases: we treat them as emergencies, respond same-day for site assessment, and move as fast as the scope allows. Call (718) 835-3555 directly — do not submit a form and wait.
Does every gas shutoff require a DOB filing?
Not always, but frequently yes. If the shutoff was triggered by a gas piping condition that requires physical correction — new piping, rerouted lines, new connections — a DOB permit must be filed by a Licensed Master Plumber before that work can begin. If the shutoff was due to an appliance issue rather than a piping issue, the path is different. We assess the specific cause of the shutoff and tell you exactly what filings are required. We don't create unnecessary permits, and we don't skip required ones.
What is CSST gas piping and why does it come up in LL152 inspections?
CSST (Corrugated Stainless Steel Tubing) is a flexible gas piping material that became common in NYC renovations beginning in the 1990s. It has known vulnerabilities to lightning-induced electrical arcing that can perforate the tubing and cause gas leaks or fires. The NYC Plumbing Code has specific requirements for CSST installation — including bonding and grounding — that weren't always followed in older installations. During LL152 inspections, non-compliant CSST installations are a common deficiency finding, particularly in Brooklyn and Queens buildings renovated in the late 1990s through 2000s.
Explore related paths
Schedule Your LL152 Inspection
We'll confirm your building's compliance status, schedule the inspection, and handle everything through GPS2 submission.