Use the official CSLB lookup
The CSLB Check A License service lets you search by contractor license number, business name, personnel name, or Home Improvement Salesperson registration. Start with the information the professional gives you and compare the result with the business you are considering.
Official license lookup: cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx. BuiltRad links to the CSLB source for homeowner education; BuiltRad does not verify or guarantee a professional on this page.
Compare the details
Look at the business name, license status, classification, personnel, and any complaint or disclosure information shown by the CSLB record. Make sure the work you are discussing fits the professional’s actual scope and classification.
If the information does not line up, pause and ask questions before signing or paying. Keep a record of the lookup date because license records can change.
License checking is one part of diligence
A license lookup does not replace reading the agreement, asking about insurance, reviewing references, understanding payment terms, or confirming how changes will be handled. Those discussions are directly between the homeowner and the licensed professional.
Quick checklist
- Get the legal business name and license number.
- Search the official CSLB database.
- Compare status, classification, and business details.
- Ask questions if the information does not match.
- Review the estimate and contract before signing.