How to Verify a CSLB License (California Homeowner Guide)
Verifying a California contractor's CSLB license takes five minutes at cslb.ca.gov and can save a Bay Area homeowner six figures. This guide walks through the Check a License tool, the seven fields on the license detail page, the A / B / B-2 / C-series classification tree, and how to read disciplinary history. It covers the $25,000 contractor bond under SB 607, the SB 216 Phase 2 workers' comp rule that took effect January 1, 2026, and what to do when a record is missing or suspended.
How do I verify a California contractor's CSLB license?
Visit cslb.ca.gov, open the Check a License tool, and enter the license number or business name. Confirm status is active, classification matches your project (Class B for general building), the $25,000 contractor bond is on file, workers' compensation is current, and no unresolved disciplinary history appears on the record. Verification is free.
Why Every Bay Area Homeowner Should Verify the License Themselves
The contractor handed you a business card with a license number on it. That is the starting point, not the finish line. California’s Contractors State License Board (CSLB) publishes every licensee’s record online, and verifying it takes about five minutes. Running this check yourself protects you from three specific risks: hiring someone whose license is suspended, hiring someone whose classification does not cover your project, and hiring someone whose bond or workers’ compensation has lapsed.
Under California Business and Professions Code §7028, performing contracting work for a project priced at $1,000 or more without an active license is a misdemeanor. According to the CSLB, Assembly Bill 2622 raised that threshold from $500 to $1,000 effective January 1, 2025. That means almost any Bay Area remodel, addition, or custom home requires a licensed contractor, and the burden of verifying is on you.
The enforcement data tells the story. According to the CSLB Fall 2024 California Licensed Contractor Newsletter, the Statewide Investigative Fraud Team (SWIFT) conducted 217 sweeps across 43 counties and 174 cities in the first half of 2024. Those sweeps opened 969 complaints, issued 70 citations to non-licensees and 52 to licensees, produced 447 advisory notices and 106 stop orders, and made 39 criminal referrals to district attorneys. Unlicensed and non-compliant contractors are a real, active population in the California market. A five-minute check at cslb.ca.gov puts you in front of that risk, not behind it.
How to Use the CSLB Check a License Tool at cslb.ca.gov
The verification tool lives at cslb.ca.gov. From the homepage, click “Check a License” in the top navigation, then choose one of three search methods:
- By license number. The fastest path if the contractor gave you a number. Type the digits with no prefix.
- By business name. Useful if the contractor gave you a company but not a number. Partial matches work.
- By personnel name. Searches responsible managing officers, qualifiers, and owners. Helpful when a contractor has changed business entities but stayed in the industry.
The result page loads a license summary, and clicking the license number opens the full detail page. Every field on that detail page matters, and the next section walks through each one.
How to Read the License Detail Page Field by Field
Seven fields on the CSLB detail page form a complete health check. Read them in this order.
1. Status
The first line should read Active. Any other status (Expired, Inactive, Suspended, Revoked, or Pending Citation) means the contractor cannot legally perform work at or above the $1,000 threshold. Do not sign a contract with a non-active license. Ask the contractor to explain the status and resume the conversation only after verifying the license is back to active.
2. Classification
This field shows the class or classes on the license: A, B, B-2, or one or more C-series specialty classifications. The classification must match your project type. The next section explains which classification fits which project.
3. Expiration Date
California contractor licenses renew on a two-year cycle. If the expiration date is within a few months of your contract signing, ask the contractor how they are tracking renewal. A license that expires mid-project creates contractual and lien-rights complications that are painful to unwind.
4. Contractor License Bond
The detail page lists the bond on file, the surety company’s name, and the effective date. The minimum contractor license bond is $25,000 under Business and Professions Code §7071.6. According to the CSLB, Senate Bill 607 raised that figure from $15,000 effective January 1, 2023. If the record shows a bond below $25,000 or lists no bond, the license is not in good standing.
5. Workers’ Compensation Insurance
The record shows either a workers’ comp carrier and policy number or an “Exempt” status. Until recently, exempt was a neutral indicator for sole practitioners with no employees. That has changed. Senate Bill 216 (Dodd, Chapter 978, 2022) phased out the blanket workers’ comp exemption. According to the CSLB, Phase 2 of SB 216 took effect January 1, 2026, requiring every licensed California contractor to carry workers’ compensation, with a narrow exception for certain joint ventures filing a certificate of exemption under Business and Professions Code §7029.
As of the publish date of this guide (April 2026), SB 216 Phase 2 is in force. A contractor showing “Workers’ Comp Exempt” on the CSLB lookup in 2026 is either out of compliance or operating under that narrow joint-venture exception. Either way, ask for a current Certificate of Insurance and written explanation before signing.
6. Personnel of Record
The detail page lists the qualifier, the responsible managing officer (RMO), responsible managing employee (RME), and any partners or members. The qualifier is the individual whose CSLB exam and experience records underpin the license. If your main contact at the company is not named here, ask how they coordinate with the qualifier on your project.
7. Complaint Disclosure and Public History
Finally, the detail page shows complaint disclosures, citations, license suspensions, revocations, accusations, and any disciplinary bonds. See the disciplinary history section below for how to read this block.
Understanding License Classifications (A, B, B-2, C-Series)
The classification field determines what kind of work the contractor can legally contract for. The four groups:
- Class A, General Engineering Contractor. Covers fixed works: highways, tunnels, utilities, and large excavation projects. According to the CSLB’s description of classifications, Class A rarely applies to single-family residential construction. Treat a Class A license alone as insufficient for a Bay Area home remodel or new build.
- Class B, General Building Contractor. According to the CSLB, Class B covers any project involving two or more unrelated trades or crafts. This is the standard classification for new custom-home construction and full remodels where framing, electrical, plumbing, and finishes all come together.
- Class B-2, Residential Remodeling Contractor. According to the CSLB Industry Bulletin, Class B-2 took effect January 1, 2021 and is the first new CSLB classification in more than fifteen years. B-2 requires a contract that includes three or more unrelated building trades or crafts, is limited to improvements on existing residential wood-frame structures, and does not allow the contractor to install, replace, substantially alter, or extend electrical, mechanical, or plumbing systems unless they also hold the relevant C-series license or subcontract to one. Minor alterations to effect fixture installation or repair are permitted. B-2 cannot be used for ground-up new construction.
- C-series specialty licenses. Each specialty license authorizes one trade: C-10 Electrical, C-20 Warm-Air Heating / Ventilating / Air Conditioning, C-36 Plumbing, C-39 Roofing, C-8 Concrete, and so on. If a contractor holds only a specialty license, they cannot legally act as a general contractor on a multi-trade project.
The practical match to project type:
| Project | Required Classification |
|---|---|
| Ground-up custom home | Class B (B-2 is disqualifying for new construction) |
| Whole-home remodel, major addition | Class B or Class B-2 (if the project meets the three-trade and wood-frame tests) |
| Kitchen or bathroom remodel (multi-trade) | Class B or Class B-2 |
| Single-trade specialty work | Matching C-series (e.g., C-36 for a plumbing-only project) |
Custom Home Design and Build (CSLB #986048, licensed since 2005) holds a Class B General Building Contractor license. That classification authorizes the firm to act as general contractor on new construction and whole-home remodels across its 60-plus Bay Area service cities.
How to Check the Contractor Bond and Workers’ Compensation
Two of the seven detail-page fields carry the most money at stake if something goes wrong: the contractor license bond and workers’ compensation insurance.
The contractor license bond is a $25,000 guarantee that protects homeowners, employees, and subcontractors who suffer financial loss because the contractor violated the license law. If the CSLB detail page lists a bond below $25,000 or shows no bond, the license is not in good standing. According to the CSLB, disciplinary bonds imposed after license suspension may run from $25,000 up to ten times the contractor’s bond under Business and Professions Code §7071.6.
Workers’ compensation insurance protects you from liability if a worker is injured on your property. Under California Labor Code §3700, any employer must carry workers’ comp, and under SB 216 Phase 2, every licensed contractor must carry it regardless of whether they currently have employees, with the narrow §7029 joint-venture exception. Two practical checks:
- Confirm the CSLB record shows an active carrier name and policy number.
- Request a current Certificate of Insurance directly from the contractor, with you named as an additional insured on the general liability policy.
If workers’ comp shows exempt on the CSLB lookup and the contractor is using employees or subcontractors on your job, stop. Resolve the inconsistency in writing before any work begins.
How to Read Disciplinary Actions and Complaint History
The CSLB detail page publishes a complaint disclosure section that surfaces citations, disciplinary orders, license suspensions, revocations, and any pending accusations. Reading this block requires context. Severity runs on a rough ladder:
- Resolved single complaint. A contractor with decades of work will sometimes show one closed complaint. That is not disqualifying by itself. Ask what happened and how it was resolved.
- Citations. A citation is a formal CSLB finding of a violation. Pay attention to citations for unlicensed work, failure to carry workers’ comp, abandonment of a project, or substandard workmanship.
- Stop orders. Per the CSLB SWIFT program, a stop order halts work on a specific project because of a serious violation. Multiple stop orders across projects are a strong red flag.
- Disciplinary bonds. A disciplinary bond above the $25,000 floor signals a past suspension. The bond amount itself tells you how seriously CSLB treated the prior infraction.
- Revocation history. If the record shows the license was ever revoked and later reinstated, read the reinstatement conditions carefully. Ask the contractor to explain.
- Pending accusation. This means CSLB has filed formal charges but the matter is not yet resolved. A pending accusation is not a final finding of guilt, but it is live and you should understand the allegation before signing.
When in doubt, call the CSLB at 1-800-321-2752 and ask about any entry on the record. Agency staff will confirm the disposition and any current enforcement activity.
What to Do if the License Is Inactive, Suspended, or Does Not Exist
If the CSLB lookup returns no record, shows a suspended or revoked license, or lists a different business name than what you were given, three steps:
- Stop the conversation. Do not sign a contract or advance any deposit. California’s deposit cap of $1,000 or 10% of the contract (whichever is less) exists precisely for these situations, but the safer move is to not pay anything at all to an unlicensed operator.
- Cross-check the business name and personnel. Search by business name and by personnel name. Some contractors change entity names after disciplinary action; the qualifier’s name is harder to hide.
- Report suspected unlicensed activity. Report suspected unlicensed contracting to the CSLB SWIFT team at cslb.ca.gov or 1-800-321-2752. Per the CSLB SWIFT 2024 enforcement data cited earlier, the agency actively pursues referrals.
It is also worth understanding your leverage if an unlicensed contractor has already done work on your property. Under Business and Professions Code §7031, an unlicensed contractor cannot legally pursue payment through California civil court, and homeowners may be entitled to recover amounts already paid. That protection only exists because the license law has teeth. Using it starts with verifying the license before work begins.
Pulling the Verification Into a Broader Hiring Process
Verifying the CSLB license is one step in a fuller hiring workflow. After the license check, the next documents to request and read are the contractor estimate (line-item scope, allowances, exclusions, markup), the Certificate of Insurance showing active general liability and workers’ comp with you named as additional insured, and the written contract with compliant deposit and change-order provisions.
For ground-up custom homes, the questions shift toward an 18 to 36 month relationship: engineer of record, architect relationship, construction loan draw schedules, and AIA contract framework. The separate guide on questions to ask a custom home builder covers that ground.
Custom Home Design and Build has operated under CSLB #986048 since 2005, with a Class B General Building Contractor license, $2,000,000 general liability, and $3,000,000 workers’ compensation coverage. The firm has completed 162 projects across San Jose and the greater Bay Area. Office: 1724 Junction Ave, Ste B, San Jose, CA 95112. Phone: (888) 306-1688.
Ready to Verify Your Contractor and Start Planning?
Run the CSLB check first. If the license is active, the classification matches your project, the bond is on file, workers’ comp is current, and the disciplinary history is clean, you have earned the right to the next conversation. We publish our license number on every page of this site for that reason.
Contact Custom Home Design and Build for a free consultation to talk through your project and the documents worth gathering before construction begins.
Frequently Asked Questions
Where do I verify a California contractor's license?
Verify at cslb.ca.gov using the Check a License tool. You can search by license number, business name, or personnel name. You can also call the CSLB directly at 1-800-321-2752. Verification is free, and the license number and business name should match what the contractor gave you on paperwork.
What does an active CSLB license status mean?
Active means the license is current, the contractor has met bonding and insurance requirements, and they are legally authorized to perform contracting work in California. Any status other than active, including inactive, suspended, expired, or revoked, means the contractor cannot legally contract for work at or above $1,000 under Business and Professions Code §7028. Do not sign a contract with a non-active license.
What CSLB license classification do I need for a custom home or remodel?
A Class B General Building Contractor license covers new custom home construction and whole-home remodels involving two or more unrelated trades. Class B-2 Residential Remodeling Contractor, a newer classification effective January 1, 2021, is limited to residential wood-frame remodels requiring at least three unrelated trades and cannot be used for new construction. Specialty trades like plumbing (C-36), electrical (C-10), or HVAC (C-20) use C-series classifications.
Is workers' comp exempt status on a CSLB record a red flag in 2026?
Yes. Senate Bill 216 Phase 2 took effect January 1, 2026, requiring every licensed California contractor to carry workers' compensation insurance, with a narrow joint-venture exception under Business and Professions Code §7029. A contractor showing workers' comp exempt on the CSLB lookup in 2026 is either newly out of compliance or relying on a very specific entity structure. Ask for documentation before signing.
What does it mean if a CSLB license has complaints or disciplinary actions?
The CSLB publishes citations, revocations, suspensions, and accusations on the license detail page. A single resolved complaint over a long career is not disqualifying. Patterns, unresolved complaints, citations for unlicensed work, stop orders, or a license revocation history are material red flags. Read every entry and ask the contractor to explain anything you find.