845 Washington Plumbing Contractors Are Working on an Expired License
An analysis of all 3,029 plumbing contractor licenses published by the Washington State Department of Labor & Industries, as of August 18, 2026.
L&I republishes its full licensee file daily. We loaded every plumbing contractor record and compared the expiration date on each against today's date. 845 licenses, 27.9% of the trade, have already lapsed.
Counties with the highest expiry rate
Ranked among counties with at least 50 licensed plumbing contractors.
| County | Licensed | Expired | Rate |
|---|---|---|---|
| Olympia | 52 | 15 | 28.8% |
| Everett | 56 | 16 | 28.6% |
| Tacoma | 111 | 31 | 27.9% |
| Seattle | 140 | 39 | 27.9% |
| Kent | 55 | 15 | 27.3% |
| Spokane | 121 | 32 | 26.4% |
| Snohomish | 53 | 14 | 26.4% |
| Vancouver | 87 | 22 | 25.3% |
| Puyallup | 60 | 13 | 21.7% |
Method
Source file: L&I public license listing, downloaded
August 18, 2026. A license counts as expired when its published expiration
date is earlier than the date of analysis. We do not adjust for grace periods, so a licensee
who renewed today may still appear here until the next daily file. Counties with fewer than
50 licensees are excluded from the ranking to avoid small-sample noise.