How to Verify a CA Contractor's License in 60 Seconds

Every licensed contractor in California is required, by state law, to put a license number on their advertising. California Business and Professions Code section 7030.5 requires it in construction contracts, in bid documents, and in all forms of advertising, as prescribed by the Contractors State License Board. What almost nobody does is actually type that number into the CSLB’s own lookup before hiring, which takes under a minute and tells you considerably more than the number itself does. Here is what to check, using our own license as the example.

Where to look

The tool is the CSLB’s free public license check, available directly on cslb.ca.gov. You can search by license number, by business name, or by the licensed individual’s name if you don’t have a number in hand. A license number search is the fastest and least ambiguous, business name searches can return several results if a name is common.

What the record actually shows

Status. The first thing the lookup returns is whether the license is currently active, expired, suspended or revoked. This is the single most important field on the page, a name and number that used to be valid tells you nothing about whether the business is currently licensed to do the work.

Classification. California licenses are issued by trade classification. A “B, General Building” license, which is what ours carries, covers projects requiring at least two unrelated trades, and it is the classification our window and door work is done under. A narrower specialty classification licenses a contractor for a specific trade only; it’s worth checking that the classification on file actually matches the work being proposed.

Bond. California requires a licensed contractor to carry a contractor’s bond, and the lookup shows the bonding company and the bond amount currently on file. Ours is on file at $25,000 with American Contractors Indemnity Company. The bond exists to give a homeowner a path to recovery in specific circumstances defined by state law; it is not insurance and it is not a substitute for checking a company’s standing directly.

Workers’ compensation. The same record shows whether the license has workers’ compensation coverage on file, or is certified as having no employees. This matters directly to a homeowner: if a worker is injured on your property and the contractor has no coverage, exposure can land on the property owner in some circumstances.

Complaint and legal history. Below the main record, the lookup lists any disciplinary actions, formal complaints and related legal history tied to the license. An empty history is not proof of nothing having ever gone wrong, but a license with a pattern of unresolved complaints is a material fact worth weighing before signing anything.

Reading ours as an example

Our license, CSLB #980336, was issued on January 14, 2013, and it carries a B, General Building classification with the $25,000 bond described above. We link directly to the CSLB lookup tool from our own site rather than just stating the number, specifically so it’s easy to go check it independently rather than take our word for it.

Note what that date does and doesn’t tell you. A license issue date says how long this particular license number has been active, it is not automatically the same as how long the individuals behind the business have worked in the trade, since license history and business history aren’t the same record. If a company’s marketing claims a length of time in business, that is a separate claim from what CSLB’s issue date shows, and it’s worth checking the two against each other rather than assuming they match. Ours is a good example: we have been installing windows and doors for over 20 years, longer than the license above has existed.

What none of this replaces

A clean CSLB record is a floor, not a ceiling. It tells you a business is currently licensed, bonded, and, as far as the state’s complaint process has caught, hasn’t generated a pattern of unresolved disputes. It does not evaluate the quality of anyone’s work, and it is not a substitute for asking direct questions about the specific job in front of you: what’s included, what happens if something is found once the wall is open, and who is actually going to be on site. The lookup is the fast, free check that should happen before any of those conversations, not instead of them.