Contractor License Proof

Duff Co

Licensed

Verified against CSLB on · View on CSLB

License details

License number
742203
Status
Active
Classifications
A · General EngineeringC-31 · Construction Zone Traffic Control
Contractor bond
$25,000
Workers' comp
Exempt
License term on file
November 4, 1997 – November 30, 2027

Business

  • (916) 698 2227 (CSLB public record)
  • 400 CANTERBURY COURT, Ione, CA 95640Amador County

Are you Duff Co? Claim this listing to manage it.

Claim this listing

Request a free quote

Tell us about your project and we'll connect you with licensed, verified California contractors.

By submitting, you agree we may share your request with relevant licensed contractors to help with your project.

Frequently asked questions

Is Duff Co licensed in California?

Yes. Duff Co holds an active California state contractor license (CSLB #742203), verified against the CSLB public record on June 17, 2026.

What is Duff Co's CSLB license number?

Duff Co's California contractor license number is 742203. You can verify it directly on the CSLB website: https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=742203

What kind of work is Duff Co licensed for?

Duff Co is classified under General Engineering (A) by the CSLB.

How do I verify Duff Co's license myself?

Look up license #742203 with the CSLB "Check a License" tool at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=742203. This page reflects the CSLB public record as of June 17, 2026.

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