Contractor License Proof

Allison-Sierra Inc

Licensed

Verified against CSLB on · View on CSLB

License details

License number
507261
Status
Active
Classifications
A · General EngineeringC-57 · Well DrillingHAZ · Hazardous Substance Removal Certification
Contractor bond
$25,000
Workers' comp
Covered
License term on file
March 13, 1987 – March 31, 2027

Business

  • (209) 966 4082 (CSLB public record)
  • 3923 BOOTJACK LANE, Mariposa, CA 95338Mariposa County

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Frequently asked questions

Is Allison-Sierra Inc licensed in California?

Yes. Allison-Sierra Inc holds an active California state contractor license (CSLB #507261), verified against the CSLB public record on June 17, 2026.

What is Allison-Sierra Inc's CSLB license number?

Allison-Sierra Inc's California contractor license number is 507261. 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 Allison-Sierra Inc licensed for?

Allison-Sierra Inc is classified under General Engineering (A), Well Drilling (C-57), and Hazardous Substance Removal Certification (HAZ) by the CSLB.

How do I verify Allison-Sierra Inc's license myself?

Look up license #507261 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 #507261 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.