License, bond, and insurance
What Trusted Contractor checked for Mt Si Mechanical LLC, and when.
Washington State Department of Labor & Industries
MT SI MECHANICAL LLC
WA license MTSIMSM786RB
- License
- active, expires Dec 6, 2026
Journey Level - Bond
- on file with WESTERN NATIONAL MUTUAL INS CO, $6,000, until canceled
- Insurance
- on file with NATIONWIDE GENERAL INSURANCE C, $1,000,000, expires Dec 5, 2026
Last checked Nov 4, 2026, 5:22 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 Mt Si Mechanical LLC's reviews
Confirm it yourself: official Washington L&I lookup · the public dataset
Recent checks
- Oct 31, 2026, 9:29 PM PacificNo change
- Oct 27, 2026, 3:30 AM PacificNo change
- Oct 26, 2026, 10:16 PM PacificNo change
- Oct 24, 2026, 4:04 AM PacificNo change