About the data

Listings come from the California Contractors State License Board (CSLB) public data portal, License Master file, downloaded November 4, 2026. Source: CSLB data portal. The CSLB says the file is current only as of its file date and that status can change at any time.

This site lists active licenses that include the C-36 Plumbing classification and have a phone number, including sole-owner licenses. It leaves out licenses that hold other classifications and show no plumbing word in their name, and licenses with a pending suspension, probation or case flag. It does not publish street addresses.

Because of these rules some real plumbers may not be listed and some listings may not be plumbing businesses. Request a removal.