Contractor License Proof

William's Heating

Licensed

Verified against CSLB on · View on CSLB

License details

License number
766335
Status
Active
Classifications
C-20 · Warm-Air Heating, Ventilating and Air-Conditioning
Contractor bond
$25,000
Workers' comp
Not covered
License term on file
July 26, 1999 – July 31, 2027

Business

  • (415) 518 3675 (CSLB public record)
  • 8 MADDUX AVE, San Francisco, CA 94124San Francisco County

Are you William's Heating? 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. See our Privacy Policy.

Other Warm-Air Heating, Ventilating and Air-Conditioning contractors in San Francisco

Associated Heating of San Francisco Inc

C-20 · San Francisco, CA

Licensed

Verified June 17, 2026 · Bonded

Q4 Mechanical Corporation

C-20 · San Francisco, CA

Licensed

Verified June 17, 2026 · Bonded

Astorga Construction Inc

C-20 · San Francisco, CA

Licensed

Verified June 17, 2026 · Bonded

Kevel Home Performance

C-20 · San Francisco, CA

Licensed

Verified June 17, 2026 · Bonded

Lopez Heating

C-20 · San Francisco, CA

Licensed

Verified June 17, 2026 · Bonded

Tritec Construction Company Inc

C-20 · San Francisco, CA

Licensed

Verified June 17, 2026 · Bonded

Browse all Warm-Air Heating, Ventilating and Air-Conditioning contractors in San Francisco

What to check next

How to verify a California contractor licenseRed flags when hiring a contractorLicensed vs. bonded vs. insured — what's the difference?Risks of hiring an unlicensed contractor

Frequently asked questions

Is William's Heating licensed in California?

Yes. William's Heating holds an active California state contractor license (CSLB #766335), verified against the CSLB public record on June 17, 2026.

What is William's Heating's CSLB license number?

William's Heating's California contractor license number is 766335. 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 William's Heating licensed for?

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

How do I verify William's Heating's license myself?

Look up license #766335 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 #766335 on CSLB

Checking more than one contractor? Verify another license.Verify a license

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