Local Law 152 by Community District: Find Your Gas Inspection Year (2026)

Local Law 152 covers approximately 190,000 NYC buildings — every Class A and Class B multiple dwelling, plus most commercial structures, with the lone exception of one- and two-family homes. Every covered building must have a Licensed Master Plumber inspect every exposed gas piping run every four years. Miss the inspection cycle and the penalty starts at $10,000.

The hard part isn't the inspection itself. It's figuring out which year your specific building is due, because LL152 staggers the city into four community-district cohorts, and most owners don't know which cohort they're in until a violation lands. This guide is the reference: how to find your community district, which year your district files, what the LMP actually does, and the difference between a clean GPS1 and an unsafe-condition GPS2.

You'll learn:

• The community-district cohort schedule, year by year
• How to look up your community district in 30 seconds
• What an LMP inspection costs in 2026 and what's actually inspected
• The 60-day filing window, GPS1 vs GPS2 forms, and the No-Gas certification path
• The four most common reasons buildings fail their first LL152 inspection

01 · WHO'S COVEREDThe basic LL152 scope

LL152, enacted in 2016 and effective January 1, 2020, applies to:

• Every NYC building except those classified as occupancy group R-3 (one- and two-family homes).
• All gas piping downstream of the utility meter — including risers, branch lines, valves, regulators, and connections to appliances.
• All buildings with active gas service, even if the service is dormant for a season.

Buildings without natural gas service can file a No-Gas Certification (we cover this in section 7). Doing so satisfies the obligation without an inspection, but it must be filed on the same cohort schedule.

02 · THE COHORT MAPWhich year your building files

The city is divided into 59 community districts, grouped into four LL152 cohorts. Each cohort files in a different year of the four-year cycle. The current cycle (2024–2027) and next cycle (2028–2031) line up like this:

If your building is in Cohort 3, your next filing is due during 2026 — meaning the LMP inspection must be performed and the GPS1 (or GPS2) form filed with DOB this calendar year. The 2027 cohort is one year out.

03 · FIND YOUR CDLooking up your community district in 30 seconds

Most owners and managers don't know their community district off the top of their head. There are three ways to find it:

Method 1 — DCP Community District Profiles

Open communityprofiles.planning.nyc.gov, type the address into the search box, and the result page shows the borough and CD number directly. This is the official source.

Method 2 — DOF Property Tax Public Access

The DOF property profile lists Community District alongside the BBL. If you've already pulled the BBL for any other compliance check, you've already pulled the CD.

Method 3 — Your existing LL152 filing history

If your building has filed before (it almost certainly has, since the law is in its second cycle), the prior filing record on DOB NOW shows which cohort year you filed under. That's your cohort going forward.

04 · WHAT THE LMP DOESThe actual inspection in 2026

Only a Licensed Master Plumber (LMP) is authorized to perform the LL152 inspection. The inspection is visual + functional, not destructive. Here's what's actually checked.

Pre-inspection preparation

• LMP must notify DOB at least two business days before the inspection through DOB NOW.
• Building must provide access to all exposed gas piping — typically requiring temporary removal of ceiling tiles, access panels, and storage in mechanical rooms.
• Gas service must be on. Buildings with seasonally dormant service should re-energize before the inspection.

What gets inspected

• All exposed gas piping from the utility meter to every gas-fired appliance
• Manual shut-off valves at every appliance
• Pipe support, bracing, and protection from corrosion
• Pipe joints and unions for visible leaks (using a calibrated electronic gas detector — not soap-and-bubble)
• Atmospheric venting and combustion air supply at appliances
• Pressure regulators and excess-flow valves
• Any signs of unauthorized modifications or repairs

What's not inspected

• Concealed piping behind walls or above hard ceilings (LMPs are not required to open finished surfaces)
• Piping inside individual residential dwelling units (covered separately by HMC habitability inspections)
• Appliance internals (separate certifications for boilers and water heaters)

Cost in 2026

Pricing for an LL152 inspection in 2026 ranges roughly:

• Small (under 10,000 sq ft, 1 mechanical room) — $400–$800
• Medium (10,000–50,000 sq ft, 1–2 mechanical spaces) — $800–$2,500
• Large (over 50,000 sq ft, multiple risers and tenant spaces) — $2,500–$8,000+

If the LMP identifies a Class B (warranting prompt attention) or Class C (immediately hazardous) condition, repair costs are separate and can run $1,500–$25,000+ depending on scope.

05 · GPS1 VS GPS2The two filings — and what each means

After the inspection, the LMP files one of two forms with DOB through DOB NOW. Which one depends on what they observed.

GPS1 — "no unsafe condition"

The clean filing. The LMP attests that no leak, defective shut-off, or other unsafe condition was found. The GPS1 is filed within 60 days of the inspection, and the building is compliant for that cycle.

GPS2 — "unsafe condition" or "Class B/C condition"

The flag. Filed when the LMP observes any unsafe condition. The form requires:

• Description of the unsafe condition
• Whether it requires immediate repair (Class C) or repair within 120 days (Class B)
• Initial action taken — typically isolating the affected section
• Plan for permanent repair

A GPS2 filing triggers a DOB inspection within 24 hours for Class C conditions. The owner must then complete repairs and have the LMP file a GPS3 (re-inspection) certifying the unsafe condition has been resolved.

06 · IF YOU FAILThe penalty math when the cycle is missed

The LL152 penalty schedule has three layers:

07 · THE NO-GAS PATHBuildings without active gas service

If your building has no active natural gas service — fully electric, district steam only, or gas service permanently disconnected — you don't need an LMP inspection. You need to file a No-Gas Certification instead.

How it works

1. Owner or LMP confirms no active gas service exists at the property.
2. Submit the No-Gas Certification form on DOB NOW.
3. Filing must occur during the building's cohort year, same as a GPS1 would.

If gas service is later restored, the No-Gas Certification is voided and the building re-enters the regular cohort cycle. This is increasingly relevant in 2026 as buildings electrify under Local Law 97 or convert away from No. 4 fuel oil under LL32.

08 · TOP 4 FAILURESWhy first-cycle buildings fail (and how to avoid it)

Looking across LL152 enforcement data, four failure modes account for the majority of GPS2 filings on a building's first cycle:

1. Missing or non-functional appliance shut-off valves. The most common Class B finding. Easy fix; commonly missed because old appliance installations didn't always include them.
2. Unsupported piping. Long horizontal runs without proper hangers — usually in mechanical rooms with renovations done by unlicensed labor over the decades.
3. Pin-hole leaks at threaded joints. Older galvanized or black-iron piping develops slow leaks at threaded connections. Often invisible visually but caught by the calibrated detector.
4. Improper venting at boilers/water heaters. Backdraft conditions, missing draft hood, blocked flues. These trigger Class C unsafe-condition GPS2 filings.

Pre-inspection walkthroughs by your in-house engineering team or building superintendent in the 60–90 days before the LMP arrives catch most of these issues. The cost of pre-inspection prep is dramatically lower than the cost of a Class B repair on the back end of a 60-day clock.

09 · YOUR DASHBOARDWhat automated tracking looks like

For owners managing more than two or three buildings, manual cohort tracking gets unmanageable fast — especially in mixed portfolios where buildings spread across multiple boroughs end up in different cohorts. ViolationWatch tracks every covered building's cohort year, sends 90/30/7-day reminders before the filing window, and pushes any DOB GPS1/GPS2 filing event into your inbox the day it's recorded.

10 · BOTTOM LINEThe 2026 LL152 to-do list

1. Look up your community district. 30 seconds at communityprofiles.planning.nyc.gov.
2. Identify your cohort. Use the table in section 2.
3. If you're in the current cohort year: book an LMP inspection in Q1 or Q2. Don't push to Q4.
4. Pre-walk the building. Shut-off valves, pipe support, joints, venting.
5. If GPS2 is filed: repair within the prescribed window. Class C = immediate; Class B = 120 days.
6. File the GPS1 within 60 days of the LMP inspection.
7. If your building has no gas service: file a No-Gas Certification on the same cohort schedule.
8. If you have a portfolio: centralize the cohort tracking. Run a free check at any address to see its cohort.

For the regulatory background, see our LL152 reference page. For the broader 2026 NYC compliance landscape, start at our 2026 NYC local laws guide. For other safety-related local laws, see our building safety local laws overview.