Looking Up Contractors
CA Contractors State License Board website
CA Contractors State License Board
Enter the contractor's business name.
Click on the license number.
Important details
Under Business Information make sure the contractor's name matches the business doing the site visit.
Confirm under Classifications that the contractor has the appropriate classification, e.g. "C39 - Roofing" vs "B - General"
Confirm under Workers Compensation that they have insurance for their workers.