Contractor License Proof

Koester Construction

Licensed

Verified against CSLB on · View on CSLB

License details

License number
682133
Status
Active
Classifications
B · General Building
Contractor bond
$25,000
Workers' comp
Covered
License term on file
December 14, 1993 – December 31, 2027

Business

  • (925) 228 3444 (CSLB public record)
  • P O BOX 6538, Concord, CA 94524Contra Costa County

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Frequently asked questions

Is Koester Construction licensed in California?

Yes. Koester Construction holds an active California state contractor license (CSLB #682133), verified against the CSLB public record on June 17, 2026.

What is Koester Construction's CSLB license number?

Koester Construction's California contractor license number is 682133. You can verify it directly on the CSLB website: https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=682133

What kind of work is Koester Construction licensed for?

Koester Construction is classified under General Building (B) by the CSLB.

How do I verify Koester Construction's license myself?

Look up license #682133 with the CSLB "Check a License" tool at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=682133. 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.