Licensed Heating & Air Conditioning (C-20) contractors in South San Francisco, CA

The California Contractors State License Board (CSLB) lists 9 Heating & Air Conditioning (C-20) contractors in South San Francisco, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of June 27, 2026.

9 contractors

1. Ace Furnace Company INC

   South San Francisco, CA · CSLB #235989 · as of June 27, 2026
   Active · clear
2. All Air Mechanical Contractors INC

   South San Francisco, CA · CSLB #851335 · as of June 27, 2026
   Active · clear
3. Alpha Plus Appliances Heating & Air Conditioning Services

   South San Francisco, CA · CSLB #998479 · as of June 27, 2026
   Active · clear
4. Annuzzi Heating And Cooling INC

   South San Francisco, CA · CSLB #742916 · as of June 27, 2026
   Active · clear
5. Atlas Heating & Ventilating CO

   South San Francisco, CA · CSLB #856293 · as of June 27, 2026
   Active · clear
6. LMJ HVAC

   South San Francisco, CA · CSLB #1066509 · as of June 27, 2026
   Active · clear
7. Peninsula Heating

   South San Francisco, CA · CSLB #926857 · as of June 27, 2026
   Active · clear
8. Triton Appliance Repair LLC

   South San Francisco, CA · CSLB #1138925 · as of June 27, 2026
   Active · clear
9. Wolves HVAC Mechanical

   South San Francisco, CA · CSLB #760264 · as of June 27, 2026
   Active · clear

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Data sourced from the California Contractors State License Board (CSLB), current as of June 27, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.