Short answer. Open cslb.ca.govand search by license number, business name, or personal name. Confirm the status reads "Active", the bond is in place, workers compensation is current, and there are no open disciplinary actions. The full walkthrough below shows what to look for and what to skip.
Most homeowners in California hire a contractor based on a referral, a Google search, or a polished sales call. That works until the project is half done and the deposit is gone. The single best filter before you write a check is the CSLB lookup. It takes about five minutes. It is free. And it surfaces the issues that referrals rarely mention.
This guide walks through the CSLB lookup site step by step, explains what every field on the license page actually means, and lists the red flags that should pause the conversation. We use our own license, #1072368, as the worked example so you can run the same search and compare results.
What CSLB is and what the license actually covers
The Contractors State License Board is the California state agency that licenses and regulates construction contractors. CSLB sits inside the Department of Consumer Affairs. It issues licenses, enforces contracting law, and maintains the public record on every active and inactive contractor in the state. The agency is governed by the Contractors State License Law in Business and Professions Code Division 3, Chapter 9.
A current CSLB license tells you three concrete things. First, the person or company has passed the trade exam and the law and business exam for the classifications they hold. Second, they have posted the contractor bond required by state law, currently $25,000. Third, they are on the state record under a specific legal business name with a verified mailing address. If any one of those fails, the license is suspended, revoked, or never existed.
How to run the CSLB lookup in five minutes
Here is the exact sequence. We use license number #1072368 as the example.
- Open the CSLB lookup page at cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx. Bookmark it. Do not use third-party license sites because they are slow to update.
- Choose the search type. License number is fastest if you have it. Business name works if the contractor gave you a company name. Personal name works for the named individual on the license. Use what you have.
- Type the value and submit. For the worked example, enter 1072368 in the license number field and click Find.
- On the results page, click the license number link to open the full detail page. The detail page is what matters. The search results page only shows a summary.
- Walk the eight fields on the detail page in order: status, business information, classifications, bond, workers compensation, personnel, license history, and any disciplinary or judgment sections that appear. The next section explains each one.
How to read every field on the license detail page
This is the part most homeowners skip. Each field below carries a specific signal.
License status
You want to see Active. If the status reads Inactive, Suspended, Expired, or anything other than Active, stop the hiring process and ask the contractor in writing why. Inactive is not the same as bad, but it does mean the contractor cannot legally contract for new work at the moment.
Business information
Confirm the legal business name on CSLB matches the name on the proposal, contract, and certificate of insurance you have been given. A name mismatch is one of the most common scam patterns. The address listed should also match the business address shown on the contractor's website or letterhead.
Classifications
California uses letter codes for the types of work a contractor can perform. The most common one for home remodeling is B General Building Contractor, which authorizes any project that involves two or more unrelated trades. Specialty codes like C-10 electrical, C-36 plumbing, C-39 roofing, and others define narrower scopes. Confirm the classification on the license matches the scope of the work being quoted. A C-39 roofer cannot legally take on a full kitchen remodel, for example.
Contractor bond
Every active California license requires a contractor bond, currently set at $25,000. The page lists the bond company, bond number, and effective date. A missing or lapsed bond suspends the license automatically. The bond is not insurance for you, but it does give limited recourse in disputes when other channels fail.
Workers compensation
If the contractor has employees, the page lists the workers compensation carrier and policy number. If the license shows an exemption, the contractor is claiming they have no employees. That can be valid for solo operators, but it is a flag for any company that will be sending a crew of three or more to your job. Ask for a separate certificate of insurance with you listed as an additional certificate holder.
Personnel and license history
The personnel section names the individuals who are on file as officers, partners, or qualifiers for the license. The history section shows when the license was first issued and any reissue events. A long, continuous history is a positive signal. A license that was reissued recently after a gap deserves a follow-up question.
Disciplinary actions, citations, and arbitration
These sections are blank for most licensed contractors. When they are not blank, read every line. A single resolved citation from years ago is different from a pattern of recent actions. Click through to the full document when available. Most consumer complaints never appear here because they are resolved or dropped, so a clean record is not proof of perfection. Combine the CSLB record with Google reviews, the BBB profile, and direct references for a full picture.
Three red flags worth ending the conversation over
If any of the following show up, pause the engagement and ask written questions.
- The license number on the proposal does not match the legal business on CSLB.This is the most common pattern in California license fraud. Sometimes the contractor borrowed a friend's license. Sometimes they renamed the business and never updated the state record. Either way, the contract you sign will not hold the way you think it does.
- The classification does not cover the scope.A C-39 roofer cannot legally pull permits for a full kitchen and bathroom remodel that touches plumbing, electrical, and structural work. The same goes for a C-10 electrician quoting a backyard hardscape build. If the scope and class do not match, the contractor will end up either subcontracting work they cannot supervise or pulling permits under someone else's license. Both create real risk for you.
- The workers compensation field shows an exemption while a crew is on site. If a worker gets hurt on a job where the contractor is exempt and has employees on the ground, the homeowner can become liable. Confirm a current certificate of insurance and check that the carrier matches the CSLB record.
What CSLB does not tell you
The CSLB lookup is the strongest single tool you have, but it is not a finished decision. The state record will not show how the contractor communicates, how they handle change orders, whether their schedule is realistic, or how they treat the punch list at the end of a project. For those answers, ask for three recent references with phone numbers, request a copy of a sample written estimate so you can see how scope and pricing are broken out, and confirm the contractor is comfortable putting payment milestones tied to inspection sign-offs into the contract.
Use the CSLB lookup on us right now
We list our license, #1072368, in the footer of every page on this site and on every estimate we send. Run the lookup before we visit. Make sure the status is active, the bond is current, the workers comp record is on file, and the business name matches what you see on this site. Then we can spend the onsite visit talking about your project instead of credentials.
Ready to move on? Read the cost guide for ADU builds in Los Angeles or the Los Angeles kitchen remodel cost breakdown next. Or compare layouts in the small bathroom remodel ideas guide.
