License, bond, and insurance
What Trusted Contractor checked for Cornerstone Tree Services, and when.
Washington State Department of Labor & Industries
CORNERSTONE TREE SERVICES
WA license CORNETS747B7
- License
- active, expires Feb 2, 2028
Tree Removal Service - Bond
- on file with Platte River Ins Co, $15,000, until canceled
- Insurance
- on file with PRIME INSURANCE COMPANY, $1,000,000, expires Jan 23, 2027
Last checked Nov 4, 2026, 5:21 AM Pacific against Washington L&I public data (General (m8qx-ubtq), Bond (bzff-4fmt), Insurance (ciwg-agsx)). We read every Washington and Oregon license from state data each day, and again when this page opens more than 12 hours after the last check. The state itself can take a few days to post changes. Check again now
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Confirm it yourself: official Washington L&I lookup · the public dataset
Recent checks
- Oct 28, 2026, 8:45 AM PacificNo change
- Oct 19, 2026, 8:09 PM PacificNo change
- Oct 18, 2026, 12:12 AM PacificNo change