GROUNDWORKS
Plumbing Contractor license GROUN**756KN issued by the Washington State Department of Labor & Industries. Status shown as of August 17, 2026.
This license is active. It is valid through May 15, 2027, 271 days from today, according to the most recent L&I public file.
| License holder | GROUNDWORKS |
|---|---|
| Business name | GROUNDWORKS |
| License type | PLUMBING CONTRACTOR |
| License number | GROUN**756KN |
| Status today | Active |
| Expiration date | May 15, 2027 |
| City | Seattle |
| County of record | Seattle |
| Phone on file | 2535533529 |
| Classifications | PLUMBING CONTRACTOR |
| Issuing authority | Washington State Department of Labor & Industries |
| First seen in public file | August 17, 2026 |
| Last confirmed | August 17, 2026 |
How to confirm this yourself
This page reproduces the L&I public license file, which the agency republishes daily. Before you hire anyone, confirm the record at the source and ask the contractor for proof of insurance separately, since licensing and insurance are not the same thing and the state file does not cover insurance.
Verify at L&I → File a complaint
There are 140 licensed plumbing contractors on record in Seattle County. Compare them all →