ContractorHistory

Plumbing contractors in Washington

2,262 active plumbing contractors are registered with Washington L&I. 4,448 registrations are on record in all, including expired and other statuses.

199 of the active plumbing contractors registered in Washington are based in other states.

2,262 active registrations

Businesses by registered name and license number. Show all 4,448 registrations on record, including expired.