Washington · Plumbing contractors
Licensed Plumbers in Washington
Washington L&I lists 2,007 plumbers with an active registration and a Washington business address. Our 5 city lists cover 384 of them. Pick a city to see license numbers, expiry dates and whether a bond and insurance are on file.
Plumbers by City
- Licensed plumbers in Puyallup, WA (49)
- Licensed plumbers in Seattle, WA (104)
- Licensed plumbers in Spokane, WA (88)
- Licensed plumbers in Tacoma, WA (78)
- Licensed plumbers in Vancouver, WA (65)
How to Read These Lists
Each city list includes only registrations whose status is ACTIVE in the L&I file dated Oct 30, 2026. Smaller markets such as Puyallup, Vancouver, Tacoma, Spokane, Seattle often have fewer than a hundred registered plumbers, which makes it quicker to compare every option.
Not every Washington city has a list yet: we publish a city once it has enough active registrations to be useful, and add more cities in stages.