Hiring a plumber
How to check a plumber's license
Published by Prime Plumbing · Updated · How we write our guides
Short answer
Ask the plumber for their license number, then search it on the website of the agency that issued it. In most states that is a state plumbing or contractor board. In states without a statewide license, such as New York, Pennsylvania, Kansas and Missouri, the city or county issues it. Confirm the license is active and that the name matches the company you are hiring.
Who issues plumbing licenses?
Most states license plumbers at the state level, through a plumbing board, a contractor board or a department of labor. A handful leave licensing to cities and counties. Some large cities, including Chicago and New York City, license plumbers separately from the rest of their state. Our state pages name the licensing body for each state.
What should I check on a license?
- The license is active, not expired or suspended
- The name on the license matches the company or person doing the work
- The license class covers the job: journeyman, master or contractor
- Any complaints or disciplinary actions listed
- Proof of liability insurance, and a bond where the state requires one
What should I ask before work starts?
- What is your license number?
- Will you pull the permit, and is the cost included?
- Is the price a fixed quote or an hourly rate?
- What warranty covers the labor and the parts?
Why do permits matter?
Water heaters, sewer repairs, repipes and gas work usually need a permit. The inspection that follows is an independent check of work that affects safety. Unpermitted work can cause problems with insurance claims and when you sell the house.
How does Prime Plumbing fit in?
Prime Plumbing is a referral service. The plumbing company you are connected with holds its own license and provides its own pricing and warranty, so run the same check on it as you would on any contractor.
Common questions
Is a handyman allowed to do plumbing work?
It depends on the state. Many allow a handyman to do minor repairs under a dollar limit, but work on water heaters, gas lines, sewers and new piping generally requires a licensed plumber.
What is the difference between a journeyman and a master plumber?
A journeyman has completed an apprenticeship and passed an exam to work independently. A master plumber has additional years of experience and a further exam, and in most states is the one who can run a business and pull permits.
Further reading from official sources
- State consumer protection offices (USA.gov)
This guide is general information for homeowners, not a substitute for an on-site assessment. Plumbing codes and permit rules vary by city and state.