Licenced Master Plumber
A Licensed Master Plumber (LMP) is the top‑level plumber license in New York City. An LMP is allowed to open a plumbing business, file permits with the DOB, and take legal responsibility for plumbing and gas work. To qualify, a person usually needs about seven years of full‑time plumbing experience, including time working directly under a Licensed Master Plumber in New York City. They must also pass a DOB exam that tests knowledge of the NYC Plumbing Code, local rules, and basic trade math. After getting licensed, an LMP must keep the license active by renewing it regularly and following DOB rules.
LMP – Key facts (NYC)
- Highest level plumbing license issued by NYC Department of Buildings (DOB).
- Can file plumbing and gas permits and supervise other plumbers.
- Needs several years of plumbing experience (including NYC experience) and must pass written and practical exams.
- Must renew DOB license and business registration regularly to keep working legally.
The New York City Department of Buildings (DOB) licenses plumbers in NYC, issuing Master Plumber and Journeyman Plumber licenses after applicants meet experience requirements, pass exams, and submit documentation.
When do I need an LMP?
- resolving certain ECB/OATH plumbing violations,
- filing permits for gas piping
- replacing boilers or water heaters above certain thresholds, etc.
Related terms
Some glossary entries use an asterisk * at the end of the term (for example, violation*). This mark is only a technical tool to stop the system from creating too many automatic links on the website. It does not change the meaning of the term.
Resolving boiler violations
