License & Insurance Verification
Proof of current Massachusetts license and liability insurance must be shown before work begins.
In Massachusetts, plumbing work over a certain value requires a licensed journeyman or master plumber, and all businesses must carry general liability insurance. A trustworthy plumber will readily share a copy of their current license number issued by the Massachusetts State Board of Plumbing and Pipefitting and confirm coverage of at least $1 million in liability insurance. In Boston, where older homes often involve complex, code-sensitive work, this protects you from liability if something goes wrong on-site.
Unlicensed contractors sometimes operate under contractors’ licenses or use subcontractor loopholes. Always ask for the plumber’s MA license number and verify it online at the state’s official license lookup portal. If they hesitate or refuse, walk away. Insurance certificates should list your property address and include an expiration date—no blanket statements like 'we're fully insured.'
In many Boston neighborhoods where homes are multi-family or mixed-use, proper licensing ensures work meets both residential and commercial codes. If damage occurs and the plumber lacks insurance, you could be liable for repairs or injuries—a risk not worth taking. BostonPlumbers.com only lists plumbers whose license status and insurance are confirmed active.
