Contractor License Proof

Carstens Construction Co

Licensed

Verified against CSLB on · View on CSLB

License details

License number
305427
Status
Active
Classifications
B · General Building
Contractor bond
$25,000
Workers' comp
ExemptNo employees — not a red flag.
License term on file
May 12, 1975 – March 31, 2028

Business

  • (650) 349 0431 (CSLB public record)
  • 1206-A WEST HILLSDALE BL, San Mateo, CA 94403San Mateo County

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Frequently asked questions

Is Carstens Construction Co licensed in California?

Yes. Carstens Construction Co holds an active California state contractor license (CSLB #305427), verified against the CSLB public record on June 17, 2026.

What is Carstens Construction Co's CSLB license number?

Carstens Construction Co's California contractor license number is 305427. 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 Carstens Construction Co licensed for?

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

How do I verify Carstens Construction Co's license myself?

Look up license #305427 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 #305427 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.