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

The California Contractors State License Board (CSLB) lists 2 Heating & Air Conditioning (C-20) contractors in Signal Hill, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of June 28, 2026.

2 contractors

1. MCX Air Systems

   Signal Hill, CA · CSLB #1147992 · as of June 28, 2026
   Active · clear
2. Signal Mechanical INC

   Signal Hill, CA · CSLB #571650 · as of June 28, 2026
   Active · clear

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Data sourced from the California Contractors State License Board (CSLB), current as of June 28, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.