KOSTOFF DEVELOPMENT LLC
Construction Contractor license KOSTODL782DJ issued by the Washington State Department of Labor & Industries. Status shown as of August 17, 2026.
This license is active. It is valid through March 19, 2028, 580 days from today, according to the most recent L&I public file.
| License holder | KOSTOFF DEVELOPMENT LLC |
|---|---|
| Business name | KOSTOFF DEVELOPMENT LLC |
| License type | CONSTRUCTION CONTRACTOR |
| License number | KOSTODL782DJ |
| Status today | Active |
| Expiration date | March 19, 2028 |
| City | Tieton |
| County of record | Tieton |
| Phone on file | 5098341385 |
| Classifications | CONSTRUCTION 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 46 licensed construction contractors on record in Tieton County. Compare them all →