Local Law 152 Inspectors
Local Law 152 requires inspections by a Licensed Master Plumber (LMP). Learn who qualifies, how to verify credentials, and what to expect during the inspection process.
Who Can Perform LL152 Inspections
Local Law 152 strictly limits who can perform gas piping inspections. The law requires all inspections to be conducted by a Licensed Master Plumber (LMP) holding a current, valid license issued by the NYC Department of Buildings.
Alternatively, the inspection may be performed by an individual working under the direct and continuing supervision of an LMP. This means the LMP must be present on-site or immediately available to direct the work — remote supervision does not qualify.
General plumbers, journeyman plumbers, building maintenance staff, and other tradespeople are not authorized to perform LL152 inspections, regardless of their experience with gas piping systems. Only the LMP or their direct supervisee can conduct the inspection and file the GPS-2 certification.
How to Verify a Plumber's License
Before hiring an inspector, always verify their license status. Here is how to confirm a Licensed Master Plumber's credentials:
- DOB NOW portal: Visit the NYC Department of Buildings' DOB NOW system and search under License Verification. Enter the plumber's name or license number to view their current status.
- Check active status: Confirm the license is currently active and not expired, suspended, or revoked. An expired license does not qualify for LL152 inspections.
- Verify license type: Ensure the license type is specifically "Licensed Master Plumber." Other plumbing licenses or certifications do not satisfy the LL152 requirement.
- Review disciplinary history: Check for any disciplinary actions, violations, or complaints against the plumber. A clean record is a strong indicator of professionalism.
- Request the license number upfront: Any legitimate LMP will readily provide their license number. If an inspector hesitates or cannot provide it, look elsewhere.
What the Inspector Checks
During a Local Law 152 inspection, the Licensed Master Plumber examines the building's gas piping system thoroughly:
- Exposed gas piping: All visible gas piping from the point of entry into the building to each gas appliance connection.
- Connections and fittings: Every joint, valve, and connection point is inspected for integrity, proper installation, and compliance with code.
- Gas leak detection: Using approved testing methods, the inspector checks for active leaks throughout the piping system.
- 50% unit sampling: In residential buildings, the inspector must access and examine gas piping in at least 50% of occupied apartments. If conditions are found, the sampling may be expanded to 100%.
- Public and common spaces: Hallways, stairwells, mechanical rooms, boiler rooms, laundry rooms, and all other common areas with gas piping are inspected.
- Illegal installations: The inspector looks for any unauthorized modifications, unapproved appliance connections, or installations that do not meet code requirements.
The Inspection Process
Understanding what to expect during an LL152 inspection helps building owners prepare effectively:
- Scheduling: Contact the LMP well in advance — at least 3-6 months before your community board deadline. Peak filing periods see high demand for qualified inspectors.
- Duration: Expect 2-6 hours depending on building size. Small buildings (under 10 units) typically take 2-3 hours, while large buildings (50+ units) may require a full day or multiple visits.
- Access coordination: The building owner is responsible for providing access to all common areas and coordinating tenant access for the 50% unit sampling. Send advance notice to tenants.
- What to prepare: Have building plans or riser diagrams available if possible. Ensure mechanical rooms and utility areas are unlocked and accessible. Clear any obstructions around gas piping.
- During the inspection: A building representative should be available on-site to assist with access and answer questions. The inspector will document conditions photographically and in writing.
After the Inspection
Once the inspection is complete, the Licensed Master Plumber determines the outcome and files the required documentation:
- GPS-2 filing within 60 days: The LMP files the Gas Piping System Periodic Inspection Certification through DOB NOW, documenting their findings and the condition of the system.
- Three possible outcomes:
- No conditions found (pass): The gas piping system is in satisfactory condition. The GPS-2 is filed and compliance is complete.
- Non-hazardous conditions found: Issues exist but do not pose an immediate danger. The building owner has 120 days to complete repairs and document the corrective work.
- Hazardous conditions found: An immediate safety risk is identified. The LMP must notify the utility company and the DOB immediately, and the gas supply may be shut off until repairs are completed.
If remediation is required, work must be performed by a licensed plumber and documented. The LMP may need to conduct a follow-up inspection to verify that all conditions have been corrected.
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Frequently Asked Questions
Can a regular plumber perform a Local Law 152 inspection?
No. Only a Licensed Master Plumber (LMP) can perform or directly supervise a Local Law 152 inspection. Journeyman plumbers, general contractors, and unlicensed individuals are not authorized to conduct these inspections or file GPS-2 certifications, even if they are experienced with gas piping systems.
How do I verify a plumber's license before hiring them?
You can verify a plumber's license through the NYC Department of Buildings' DOB NOW portal or the License Verification section of the DOB website. Search by the plumber's name or license number to confirm active status, check for any disciplinary actions, and verify their license type is "Licensed Master Plumber."
Can a building's in-house maintenance staff perform the inspection?
No. Even if your building employs maintenance staff with plumbing experience, the inspection must be performed by an LMP or under the direct and continuing supervision of an LMP. In-house staff cannot substitute for the licensed inspector requirement.
How long does a Local Law 152 inspection take?
A typical LL152 inspection takes 2 to 6 hours depending on building size. Small buildings (under 10 units) may be completed in 2-3 hours, while large buildings with 50+ units can take a full day. The 50% unit sampling requirement and tenant access coordination are the primary factors affecting duration.
What should I do to prepare for the inspection?
Notify tenants in advance and coordinate access to at least 50% of units. Ensure mechanical rooms, boiler rooms, and all common areas are accessible. Clear any obstructions around gas piping runs and have building plans or riser diagrams available if possible. The more prepared you are, the more efficient the inspection will be.
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