Licensed Heating & Air Conditioning (C-20) contractors in Danville, CA

The California Contractors State License Board (CSLB) lists 9 Heating & Air Conditioning (C-20) contractors in Danville, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of October 6, 2026.

9 contractors

1. Air Design Heating & Cooling

   Danville, CA · CSLB #604264 · as of October 6, 2026
   Active · clear
2. Ascent Conserve INC

   Danville, CA · CSLB #1147057 · as of October 6, 2026
   Active · clear
3. Ascent INC

   Danville, CA · CSLB #1069809 · as of October 6, 2026
   Active · clear
4. California Air INC

   Danville, CA · CSLB #300798 · as of October 6, 2026
   Active · clear
5. HVAC Energy Solutions

   Danville, CA · CSLB #1132058 · as of October 6, 2026
   Active · clear
6. H C Jensen Plumbing INC

   Danville, CA · CSLB #265318 · as of October 6, 2026
   Active · clear
7. M-23 Mechanical Systems

   Danville, CA · CSLB #1083192 · as of October 6, 2026
   Active · clear
8. Matheneys Plumbing & Heating

   Danville, CA · CSLB #933520 · as of October 6, 2026
   Active · clear
9. Qualtech Heating & Cooling

   Danville, CA · CSLB #905205 · as of October 6, 2026
   Active · clear

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Data sourced from the California Contractors State License Board (CSLB), current as of October 6, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.