Contractor License Proof

Duarte William

Licensed

Verified against CSLB on · View on CSLB

License details

License number
1099006
Status
Active
Classifications
C-20 · Warm-Air Heating, Ventilating and Air-Conditioning
Contractor bond
$25,000
Workers' comp
Covered
License term on file
November 22, 2022 – November 30, 2026

Business

  • (510) 309 5322 (CSLB public record)
  • 1748 MISSION ST, San Francisco, CA 94103San Francisco County

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Frequently asked questions

Is Duarte William licensed in California?

Yes. Duarte William holds an active California state contractor license (CSLB #1099006), verified against the CSLB public record on June 17, 2026.

What is Duarte William's CSLB license number?

Duarte William's California contractor license number is 1099006. 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 Duarte William licensed for?

Duarte William is classified under Warm-Air Heating, Ventilating and Air-Conditioning (C-20) by the CSLB.

How do I verify Duarte William's license myself?

Look up license #1099006 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 #1099006 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.