Local Law 152: The Gas Piping Inspection Every Brooklyn Owner Owes

Q: How often is the inspection required?

Every **four years**, on a schedule set by **community district**. Every covered building in a given community district shares the same inspection year, and the districts are staggered across the four-year cycle. So the right question isn't 'what year is it' — it's 'which community district is my building in, and what's that district's year.' The Department of Buildings publishes the district schedule.

Q: Who is qualified to do the inspection?

A **Licensed Master Plumber (LMP)**, or a qualified individual working under the direct and continuing supervision of one. This is not a job for a general handyman or an unlicensed plumber, and the filing has to come back to a licensed master plumber. If a vendor quotes you a Local Law 152 inspection without an LMP behind it, that's a signal to look elsewhere.

Q: What has to be filed, and when?

After the inspection, the owner files a **Gas Piping System Periodic Inspection Certification (GPS1)**, signed by the LMP, with the Department of Buildings — due within **60 days** of the inspection date. If the inspection turns up conditions that require correction, the repairs must be made and a follow-up certification (**GPS2**) filed within **120 days**, with the possibility of requesting an extension where more time is genuinely needed. Confirm current forms and deadlines with DOB, since filing mechanics do get updated.

Unlike facade rules, Local Law 152 reaches almost every multifamily building in Brooklyn — and the deadline depends on which community district you're in, not the calendar year.

By Jordan, PartnerUpdated 2026-08-13

Ask a Brooklyn owner about NYC compliance inspections and they'll usually mention the facade rules first. But Local Law 152 — the periodic gas piping inspection — is the requirement that actually touches most of the buildings we manage, because its exemption is far narrower.

Local Law 11 lets you off the hook if your building is six stories or fewer. Local Law 152 only exempts occupancy group R-3, broadly the one- and two-family home category. That means the three-family walk-up, the six-unit pre-war, the twelve-unit building on the corner — all of the small and mid-size Brooklyn multifamily stock that skates past the facade rules — is covered here.

If you own multifamily property in New York City and you have gas piping, assume you're in until an LMP tells you otherwise.

The deadline depends on your community district, not the year

This is the single most misunderstood part of the law. Local Law 152 inspections are required every four years, but not every building files in the same year. The city assigns inspection years by community district, staggered across the four-year cycle.

So two owners can both be fully compliant and be inspecting in completely different years. And an owner who bought a building mid-cycle can easily inherit a deadline they know nothing about.

The practical step: identify your building's community district, look up that district's scheduled year on the Department of Buildings' Local Law 152 schedule, and put it on a calendar with enough lead time to actually book a licensed plumber. Brooklyn's community districts run 1 through 18, and the neighborhoods we manage in are spread across a number of them — Bed-Stuy, Crown Heights, Bushwick, and Flatbush are not all in the same district or the same inspection year.

Only a Licensed Master Plumber can sign it

The inspection must be performed by a Licensed Master Plumber (LMP) or by a qualified person working under an LMP's direct and continuing supervision. The certification that goes to DOB is signed by the LMP.

This trips up owners who have a reliable general contractor or a handyman who "does plumbing." For this filing, the license is the requirement. If a vendor is pitching a cheap Local Law 152 inspection and can't tell you which LMP is standing behind it, that inspection will not produce a valid filing.

What gets inspected

The inspection is focused on exposed gas piping in the public and common portions of the building — hallways, corridors, stairwells, boiler and mechanical rooms, basements, and similar non-dwelling spaces. It is not a unit-by-unit inspection of the piping inside every apartment.

What the LMP is looking for:

Illegal, unpermitted, or improperly performed gas connections
Piping that doesn't meet code — wrong materials, improper supports, missing labeling
Corrosion, deterioration, and physical damage
Evidence of leaks, including the use of gas detection equipment
Whether the building is meeting its gas leak notice obligations to residents

Illegal connections are the finding that most often surprises owners, particularly on buildings that have changed hands a few times or had work done informally over the years. Someone's uncle ran a line to a dryer in 1994 and nobody has thought about it since.

The filing sequence and the clock

GPS1 — the certification

After the inspection, the owner files a Gas Piping System Periodic Inspection Certification, signed by the LMP, with DOB. Due within 60 days of the inspection.

GPS2 — if repairs are needed

Where conditions require correction, repairs are made and a follow-up certification is filed within 120 days, with extensions available where genuinely warranted.

Then the four-year clock resets

Your next inspection lands in your community district's next scheduled year.

The 60-day window is the one owners lose. The inspection happens, the plumber says it went fine, everyone moves on, and nobody files. The inspection without the filing satisfies nothing — DOB's record shows a missing certification either way.

Because DOB updates forms, portals, and deadlines periodically, confirm the current filing mechanics and any fee or penalty amounts directly with the Department of Buildings rather than relying on a figure from an article. That includes this one.

When the inspection finds a leak

Worth stating plainly: if the LMP identifies a hazardous leak condition, this stops being a compliance exercise. The utility and the Fire Department are notified, and gas service to the affected piping gets shut down until the condition is made safe.

That outcome is disruptive — for a residential building it can mean no cooking gas, and depending on the system, no heat or hot water — but it is the correct outcome, and it is the reason the law exists. Owners who treat Local Law 152 as a formality to be minimized are, in effect, betting that nothing is wrong in piping they haven't looked at in four years.

Why this one is worth being early on

Three reasons we push our owners to schedule Local Law 152 inspections well before their district's window closes:

Licensed plumber availability is finite. Every covered building in your community district owes an inspection in the same year. Demand concentrates, and the owners who call in the last quarter pay more and wait longer.

Repairs need runway. If the inspection finds a condition, you have a fixed window to correct it and re-certify. Discovering a real problem with two weeks left on the clock turns a manageable repair into an emergency and an extension request.

Gas shutdowns are the worst-case scenario for occupied buildings. A restoration after a shutdown involves the utility, permitting, pressure testing, and re-inspection — a process measured in weeks or months, during which you have tenants without cooking gas and, in many buildings, without heat or hot water. Nearly every one of those situations is more expensive and more damaging to owner-tenant relations than the proactive repair would have been.

How we handle it

For the buildings in our portfolio, Local Law 152 is tracked as a recurring calendar obligation tied to each property's community district, with the inspection scheduled early in the window rather than at the end of it, an LMP engaged from our vetted vendor list, the GPS1 filed inside the 60-day window, and any corrective work scoped and priced for the owner immediately — not after the correction deadline is already in view.

It's an unglamorous piece of compliance. It's also one of the few where the failure mode includes a building full of residents with no gas, which is why it gets treated as a hard deadline rather than a soft one.

If you own a Brooklyn building and you don't know your community district's inspection year, schedule a property consultation and we'll help you find out where you stand.

This guide is general information for property owners, not legal advice. Gas piping work and compliance filings should be handled with a Licensed Master Plumber.

Frequently Asked Questions

Which buildings have to comply with Local Law 152?

Buildings with gas piping systems, other than those classified in occupancy group R-3 — which is broadly the one- and two-family home category. That exemption is much narrower than the six-story threshold that governs facade inspections, which is why Local Law 152 catches so many owners off guard: the small multifamily walk-ups all over Bed-Stuy, Bushwick, and Crown Heights that are exempt from FISP are squarely covered here.

How often is the inspection required?

Every four years, on a schedule set by community district. Every covered building in a given community district shares the same inspection year, and the districts are staggered across the four-year cycle. So the right question isn't 'what year is it' — it's 'which community district is my building in, and what's that district's year.' The Department of Buildings publishes the district schedule.

Who is qualified to do the inspection?

A Licensed Master Plumber (LMP), or a qualified individual working under the direct and continuing supervision of one. This is not a job for a general handyman or an unlicensed plumber, and the filing has to come back to a licensed master plumber. If a vendor quotes you a Local Law 152 inspection without an LMP behind it, that's a signal to look elsewhere.

What has to be filed, and when?

After the inspection, the owner files a Gas Piping System Periodic Inspection Certification (GPS1), signed by the LMP, with the Department of Buildings — due within 60 days of the inspection date. If the inspection turns up conditions that require correction, the repairs must be made and a follow-up certification (GPS2) filed within 120 days, with the possibility of requesting an extension where more time is genuinely needed. Confirm current forms and deadlines with DOB, since filing mechanics do get updated.

What does the inspector actually look at?

The inspection covers exposed gas piping in public spaces, hallways, corridors, mechanical and boiler rooms, and other non-dwelling areas — not the interior piping inside every apartment. The inspector is checking for illegal or unpermitted connections, non-code-compliant installations, deterioration and corrosion, evidence of leaks, and whether gas piping is properly supported and labeled. They'll also verify that gas leak notice requirements are being met in the building.

What if the inspector finds a gas leak?

A leak is not a paperwork issue — it's an emergency. If a hazardous leak condition is identified, the utility and the Fire Department are notified and gas service to the affected piping is shut down until it is made safe. The LMP has reporting obligations in that scenario. This is one of the reasons the inspection is worth taking seriously rather than treating as a box to tick: it surfaces conditions that carry real safety and liability exposure.

What happens if I don't file?

Failure to file a required certification is a violation with civil penalties, and an owner who misses the window is generally required to file a late certification and pay the associated penalty. Beyond the fine, an open compliance failure sits on the building's DOB record, which is exactly the kind of thing that surfaces at the worst possible time during a sale, a refinance, or a permit application. Penalty amounts are set by the city and change, so verify current figures with DOB.

Does this apply if my building has no gas at all?

If a building genuinely has no gas piping system, the periodic inspection requirement doesn't apply to it — but there is a certification process for establishing that, and 'we don't really use the gas' is not the same as having no gas piping. Buildings that have been converted to electric heat and cooking sometimes still have capped or abandoned gas piping in place, which is precisely the sort of condition the law is concerned with. Have an LMP confirm the building's actual status rather than assuming.

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