United States · Trades Licensing

Plumber license lookup by state.

Plumbing licences are issued by state boards (and in some places by cities or counties). This page lists official searches for six states.

Short answer: open the licensing board for the state where the work is done and search the plumber or company. This page does not look anyone up.

Sources: state licensing boards listed belowRetrieved October 2026

How to check a plumber’s license

Search the board for the state where the job is, using the plumber’s name, business name or licence number. Texas has a dedicated plumbing board with its own public search, and Virginia lists plumbers among its tradesman licences.

Official state searches

Texas — State Board of Plumbing Examiners Public License Search ↗
The Board lists Responsible Master Plumber, Master Plumber, Journeyman Plumber, Tradesman Plumber-Limited, Plumbing Inspector and Apprentice Registration licence types.
Virginia — DPOR License Lookup ↗
DPOR lists Electricians, Plumbers and HVAC as Tradesmen licences.
California — CSLB Check a License ↗
Contractor licence or Home Improvement Salesperson registration; searchable by licence number, business name, personnel name or registration number, and can show complaint disclosure.
Washington — L&I Verify a Contractor, Tradesperson or Business ↗
Search by name, contractor/tradesperson licence, workers’ comp account or UBI number.
Nevada — State Contractors Board License Search ↗
Described by the Board as a search of the database of licensed contractors.
Florida — DBPR License Search ↗
Search by name, licence number, city or county, or licence type.

Before you hire

Ask for the plumber or plumbing contractor’s licence number and the state that issued it, then search it on the official page above. Compare the name and business name, and check the status shown. Many jurisdictions also require a permit for the work; your local building department can tell you.

States not listed

This page lists a selection of states, not all fifty. Some states license trades at the city or county level rather than the state level. For any other state, search for the state licensing board or department of labor/licensing, or ask your local building department.

Illinois

Illinois: the IDFPR lookup’s licence-type list (retrieved October 2026) has no electrician, plumber or HVAC entry, so a search there will not find one. Ask your city or county building department which agency licenses the trade locally.

Official sources used

vo.licensing.hpc.texas.gov/datamart/selSearchType.do (retrieved October 2026)
tsbpe.texas.gov/ (retrieved October 2026)
www.dpor.virginia.gov/LicenseLookup (retrieved October 2026)
www.dpor.virginia.gov/ (retrieved October 2026)
www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx (retrieved October 2026)
secure.lni.wa.gov/verify/ (retrieved October 2026)
app.nvcontractorsboard.com/Clients/NVSCB/Public/ContractorLicenseSearch/ContractorLicenseSearch.aspx (retrieved October 2026)
www.nvcontractorsboard.com/ (retrieved October 2026)
www.myfloridalicense.com/wl11.asp (retrieved October 2026)
online-dfpr.micropact.com/lookup/licenselookup.aspx (retrieved October 2026)

Frequently asked questions

Is there a national plumber license lookup?

No. Plumbers are licensed by state boards or local authorities.

What licence types does Texas list for plumbers?

The Texas State Board of Plumbing Examiners lists Responsible Master Plumber, Master Plumber, Journeyman Plumber, Tradesman Plumber-Limited, Plumbing Inspector, Apprentice Registration, other registrations and endorsements.

Does this page confirm a plumber is licensed?

No. It links to the official searches only.

My state is not listed. What do I do?

Search for your state’s plumbing board, or ask your local building department which agency licenses plumbing.

Guide only — not a verification tool

This page describes official registers and links to them. It does not check anyone’s licence status, does not copy or proxy any register, and nothing you might type here is transmitted anywhere. Registers change and licensing rules differ by state and city; use the official source linked above and contact the regulator to confirm anything that matters. This is general information, not legal advice.