Do you need a license to work as a plumber in Massachusetts?
Yes. In Massachusetts, no one may work as, or advertise for work as, a master, journeyman or apprentice plumber or gas fitter unless registered or licensed by the state’s plumbing and gas fitting examiners. A master’s license must be displayed in the place of business and every sign, listing or advertisement must show the license designation and number. A licensed plumber may work anywhere in the Commonwealth without a local license, but local permits and bonding rules still apply. This is M.G.L. c. 142, § 3.
| What | Massachusetts |
|---|---|
| Plumber license | State license; license number in every ad |
Source
M.G.L. c. 142, § 3
Read the statute in the General Laws of Massachusetts (Massachusetts Legislature): malegislature.gov.
Checked against the statute on November 12, 2026.
This is a summary of a published statute, not legal advice. Rules change, local ordinances can add to them, and the terms of a specific lease may differ. Check the citation and speak to a lawyer before acting.
How Seayora uses this rule
A contractor on Seayora keeps each license with its issuing state, its expiry date and the last four digits of its number, and the business is warned before one lapses — on the website and both phone apps. A customer finding a pro on Seayora sees whether a license is on file.
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