Contractor License Requirements in California

California requires contractor licensing for construction work on projects exceeding $500. The licensing process is overseen by the California Contractors State License Board (CSLB). California has one of the most comprehensive contractor licensing systems in the country with 43 specialty classifications under Class C. A $25,000 contractor bond is required. Workers' compensation insurance is mandatory if you have employees. The CSLB actively investigates unlicensed contracting.

Important

Never hire a contractor who cannot provide a valid license number. A legitimate contractor will have no hesitation sharing their license credentials for you to verify independently. If a contractor refuses, discourages you from checking, or makes excuses, treat that as a serious red flag.

Contractors State License Board (CSLB)

Search by: License number, Business name, Personnel name

Follow these steps to verify a contractor's license in California:

1. 1
   Go to the CSLB license check pageVisit the California Contractors State License Board online license check at cslb.ca.gov. This is the only official source for verifying California contractor licenses.
2. 2
   Enter the contractor's informationYou can search by license number (most accurate), business name, or the name of the person listed on the license. If you have the license number, use that first -- it returns the most precise results.
3. 3
   Review the license statusCheck that the status shows "Active." If it says "Suspended," "Revoked," or "Expired," the contractor is not legally authorized to perform work. Also confirm the license classification matches your project.
4. 4
   Verify the bond and insuranceThe CSLB lookup shows whether the contractor has a current surety bond ($25,000 required) and workers' compensation insurance. If the insurance fields are blank or expired, ask the contractor to provide updated documentation before signing any contract.
5. 5
   Check for complaints and disciplinary actionsScroll to the complaints section. The CSLB records all filed complaints and their outcomes. A single resolved complaint may not be a dealbreaker, but multiple open complaints or license suspensions are serious warning signs.

What to Look for in Verification Results

• License status must read "Active" -- not Inactive, Suspended, or Revoked
• Bond status should show a current contractor bond of at least $25,000
• Workers' compensation insurance must be current if the contractor has employees
• License classification must match the type of work you need performed
• Check for any open or sustained complaints in the disciplinary history
• Confirm the business address matches what the contractor provided you

Hiring an unlicensed contractor in California carries significant risks for both the homeowner and the contractor:

• No consumer protections: State recovery funds and guaranty programs typically only cover work performed by licensed contractors.
• Insurance issues: Your homeowner's insurance may deny claims related to work done by an unlicensed contractor.
• Permit problems: Building permits often require a valid contractor license. Work done without permits can create issues when selling your property.
• Quality concerns: Licensed contractors have demonstrated minimum competency through exams, experience requirements, or both.
• Legal liability: Homeowners may bear greater legal responsibility for injuries or property damage caused during unlicensed work.
• Penalties: In California, unlicensed contracting can result in fines and criminal penalties for the contractor, and the homeowner may lose the ability to enforce the contract.

California does not currently have reciprocal contractor licensing agreements with other states. Contractors licensed in other states must apply for a new California license through the standard application process. Some states may credit out-of-state experience toward licensing requirements -- contact the California Contractors State License Board (CSLB) for details.