As of July 2021, you must be licensed as a Plumbing Contractor with L&I to advertise, offer to do work, submit a bid, or perform plumbing work. Only licensed plumbing contractors may employ certified plumbers to work on plumbing jobs.
To become a licensed plumbing contractor in Washington, you must:
- Register your business with the
Dept. of Revenue.
- Obtain a
Surety Bondor Assigned Savings Accountin the amount of $6,000.
- Obtain a Certificate of Liability Insurance in the amount of $250,000.
- Assign your designated plumber who carries a plumber certification with L&I.
- To remove the designated plumber, the plumber will need to un-assign from the Plumbing Contractor.
- Notarize your completed
plumbing contractor application.
- Pay the required application fees.
Note: An applicant must wait until their plumbing contractor license is active, before they engage in any plumbing work.
Licensed plumbing contractors who perform non-plumbing construction work can also register as a general or specialty contractor under
General contractors who undertake a construction project that includes some plumbing, may solicit a bid from a plumbing contractor to perform the plumbing work.
General contractors who wish to perform plumbing work must also be licensed as a plumbing contractor under