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Check a California contractor

To check a California contractor, search their business name, CSLB license number or phone number below. It shows whether the license is active or suspended, what work it covers, its bond and its workers' comp, from the Contractors State License Board's list of licensed contractors as of October 20, 2026.

Before you hire

ActiveSame name as the estimate
Right classC-36 plumbing, C-10 electrical, C-39 roofing
A crew?Then workers' comp, not exempt

Washington contractor? Check their L&I registration. Oregon? Check their CCB license.

Sources

“Provides information for all licenses that are currently renewed, or expired but renewable.”

CSLB Public Data Portal: master list of California licensed contractors · Downloaded weekly; the date of the copy searched is shown above.

“Changes to license status can occur at any time.”

CSLB Instant License Check · The CSLB's own disclaimer: its live check is the final word.

CSLB: licensing classifications · What each class lets a contractor do: C-36 is plumbing, C-10 electrical.