Licensed General Engineering (A) contractors in Ontario, CA

The California Contractors State License Board (CSLB) lists 63 General Engineering (A) contractors in Ontario, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of June 27, 2026.

Showing 61–63 of 63 contractors

1. West Coast Pipeline Specialist

   Ontario, CA · CSLB #1129511 · as of June 27, 2026
   Active · clear
2. Yacko Construction INC

   Ontario, CA · CSLB #1012085 · as of June 27, 2026
   Active · clear
3. John Yacko

   Ontario, CA · CSLB #764923 · as of June 27, 2026
   Active · clear

See all General Engineering (A) contractors in California →

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.