HIRING GUIDE
How to Verify a Plumber Is Actually Licensed and Insured in Connecticut
The exact state lookup tool to use, what license type to look for, and what to ask for before anyone starts work.
Updated September 2026 · New Haven, CT
"Licensed and insured" gets printed on every plumbing van in Connecticut, and it's easy to check whether it's actually true. It takes about two minutes on a state website, no account or sign-up required.
How to Check a Connecticut Plumbing License
- Ask for the license number directly. A licensed plumber will give it to you without hesitation, it's usually on their invoice, business card, or truck.
- Look it up on the state's eLicense system at elicense.ct.gov, the Connecticut Department of Consumer Protection's official lookup, searchable by name or license number.
- Confirm the classification. Connecticut issues P-1 (plumbing contractor), P-2 (limited plumbing contractor), and journeyperson licenses, make sure the person or company doing the work holds the right one.
- Check that it's active. The lookup shows current status along with any disciplinary history.
- Match the name on the license to who's actually showing up. A company can be licensed while an individual sent to your home isn't the one holding it.
Insurance Checks
- Ask for a certificate of insurance. A legitimate plumbing business can produce one on request, showing general liability coverage.
- Confirm workers' compensation coverage. This protects you as the homeowner if someone is injured while working on your property.
Quick Answers
What's the difference between a P-1 and a P-2 license in Connecticut?
A P-1 is a full plumbing contractor license, a P-2 is a limited plumbing contractor license with a narrower scope of work. A journeyperson license allows someone to perform plumbing work under a licensed contractor's supervision.
What if a plumber can't give me a license number?
That's a reason to keep looking. A licensed plumber has the number memorized or on their truck and vehicle signage, hesitation or a refusal to provide it is a real warning sign.
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