Contractor License Proof

Duwamish Services LLC

Licensed

Verified against CSLB on · View on CSLB

License details

License number
1139640
Status
Active
Classifications
A · General EngineeringHAZ · Hazardous Substance Removal Certification
Contractor bond
$25,000
Workers' comp
Covered
License term on file
June 30, 2025 – June 30, 2027

Business

  • (206) 644 5088 (CSLB public record)
  • 7421 5TH AVE SOUTH, Seaittle, WA 98108

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Frequently asked questions

Is Duwamish Services LLC licensed in California?

Yes. Duwamish Services LLC holds an active California state contractor license (CSLB #1139640), verified against the CSLB public record on June 17, 2026.

What is Duwamish Services LLC's CSLB license number?

Duwamish Services LLC's California contractor license number is 1139640. Look that number up with the CSLB "Check a License" tool to confirm its current status against the public record yourself.

What kind of work is Duwamish Services LLC licensed for?

Duwamish Services LLC is classified under General Engineering (A) and Hazardous Substance Removal Certification (HAZ) by the CSLB.

How do I verify Duwamish Services LLC's license myself?

Look up license #1139640 with the CSLB "Check a License" tool and compare the status, bond, and workers' compensation details against what's shown on this page. This page reflects the CSLB public record as of June 17, 2026.

Verify it yourself: How to verify a California contractor license · Look up #1139640 on CSLB

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See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.