3,648 Washington plumbing & HVAC contractor licenses
Every in-scope license in the Washington state file — 3,648 of them — is published on this page's letter sections, with each licensee's name, license number, classification, status and expiration date exactly as the state publishes them. When the file was checked, 1,328 licenses were active, 1,410 were expired and 910 carried another status (re-licensed, suspended, out of business or similar). All rows were fetched from Washington State Department of Labor & Industries (data.wa.gov) (https://data.wa.gov/d/m8qx-ubtq) on 2026-09-17; each letter section repeats that fetched-on date with its rows.
Licenses by letter
The full file is large, so it is split by the licensee's first letter. Each section is one static page listing its rows in full with the fetched-on date.
Licenses by classification
| Classification | Licenses |
|---|---|
| Heating/Vent/Air-Conditioning and Refrig (HVAC/R) | 1,430 |
| PLUMBING | 1,234 |
| HVAC/RFRG | 782 |
| BOILER/STEAM FIT/PROC PIPING | 93 |
| COMMERCIAL/INDUSTRIAL/REFRIG | 78 |
| HVAC/RFRG-RESTRICTED | 31 |
What the columns mean
Classification is Washington's own trade wording, kept verbatim — the same trade carries different labels in different states. Status is the state's own flag: active was in good standing when the file was checked, expired means the state shows it past its renewal date, and re-licensed, suspended or out-of-business flags are kept as the state prints them. Expiration dates are the next renewal date the state publishes, normalized to ISO format. Vermont publishes expiration dates but no status field. For a binding check of any single license, use the state lookup service in the directory overview.