• The fee is $45.20.
• You must pay by credit card (VISA/MC). No debit cards.
• You must not have any outstanding, unpaid infractions with L&I.
• If you have affidavits of experience to submit, mail them to:

  Department of Labor & Industries
  Plumber Certification Section
  PO Box 44470
  Olympia, WA  98504-4470

Before you apply online, you will need the following:

• Your Social Security number.
• Your credit card handy.

What L&I will do:

• Verify the hours on the affidavit.
• Mail your certificate within 2-4 weeks of receipt of your affidavits.

• The renewal fee is $45.20.
• You must pay by credit card (VISA/MC only).
• You must not have any outstanding, unpaid infractions with L&I or a collection agency.
• If your certificate is suspended for any reason, you may not renew online and you must contact us about reinstating it.
• If you have affidavits of experience, you must mail them to Department of Labor & Industries, Plumber Certification Section, PO Box 44470, Olympia, WA 98504-4470.
• 8 hours of approved continuing education each year is required for plumber trainee renewal.

Before you proceed to renew online, you will need the following:

• Your 12-digit license number.
• An active license (not suspended or canceled).
• Required documents on file with the department.
• Your credit card handy.