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

The California Contractors State License Board (CSLB) lists 2 Heating & Air Conditioning (C-20) contractors in Mountain House, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of June 27, 2026.

2 contractors

1. Es Mechanical LLC

   Mountain House, CA · CSLB #1107929 · as of June 27, 2026
   Active · clear
2. Kostas HVAC INC

   Mountain House, CA · CSLB #1155237 · 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.