License, bond, and insurance
What Trusted Contractor checked for Cornerstone Construction, and when.
Washington State Department of Labor & Industries
CORNERSTONE CONSTRUCTION
WA license CORNEC*742PN
- License
- active, expires Oct 16, 2028
General - Bond
- on file with AMHERST NATIONAL INSURANCE COMPANY, $30,000, until canceled
- Insurance
- on file with State National Ins Co Inc, $300,000, expires Sep 16, 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
See Cornerstone Construction's reviews
Confirm it yourself: official Washington L&I lookup · the public dataset
Recent checks
- Oct 31, 2026, 10:29 PM PacificNo change