California Contractor License Classes & Exam Prep

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California Construction Contractor Exam Prep

California Construction Contractor Exam Prep
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Overview

California Contractor's License: Everything You Need to Know

California offers three classes of contractor licenses, and you can add additional classifications to your license by accumulating experience hours in specialized trades.

Class A General Engineering Contractor License 

  • Fixed works projects related to most structures, systems, roadways, and public areas—requires specialized knowledge in engineering.  

Class B General Building Contractor 

  • Requires specialized knowledge specific to structures built for support or enclosure. 

Class C Specialty Contractor  

  • Requires specialized knowledge and skills in a specific trade. 

This California Contractors State License Board (CSLB) enforces licensure laws, and noncompliance can lead to significant legal and financial penalties.    By adhering to CSLB regulations, you not only ensure legal compliance but also position yourself for long-term success. Licensed contractors gain access to a range of benefits, including:  

  • Enhanced credibility and trust with clients and partners  
  • Eligibility to bid on larger and more lucrative projects  
  • Legal protection and reduced liability  
  • Access to industry resources and support  
  • A competitive edge in the marketplace 

License Requirements

Steps to Earning Any California Contracting License

Contractor Training Center will help you navigate the twists and turns you may encounter on the way to obtaining your California Contractor License. Here’s what you need to know to get started: 

  • Be at least 18 years old.  
  • Possess a valid Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN).  
  • Meet specific experience, bonding, and insurance requirements for your trade. 
  • Pass the California Trade Exam.  
  • Pass the Law and Business Exam.  
  • Submit application and fees.  
  • Submit fingerprints for a mandatory criminal background check after your application is accepted. 
  • Plus additional requirements by profession.

Holding a license ensures that those engaged in construction-related activities in California possess the necessary knowledge and understanding of building codes, construction practices, and business principles to operate safely and responsibly. To learn more about the process, check out this blog post about becoming a contractor in California. 

Exam Preparation

How to Prepare for the California Contractor Exams

California contractor exams are administered by the California Contractors State License Board (CSLB). Their purpose is to evaluate aspiring contractors' knowledge of their specific field.

Effective preparation involves a thorough review of all study materials and reference books and relevant California state codes. Exam prep courses like the packages available through Contractor Training Center can explain exactly what you need to know to pass your exam the first time. 

Frequently Asked Questions

Learn More About Contractor Licensing in California

What are the contractor licenses issued by the State of California?

California issues the Class A General Engineering Contractor License, the Class B General Building Contractor License, and the Class C Specialty Contractor License.

Did I read that right, there are three different California contractor license classes?

Yes! There are Class A, B, and C licenses, which allow the holder to contract different kinds of projects, and each come with their own requirements. Class B offers options for a B General Contractor license and a B2 Residential Remodeling Contractor. Class C is the Specialty Contractor license and has numerous specialty trades available from C2-C61. (View all license options.)If you’re not sure which license to pursue, Contractor Training Center can help! Schedule a call with one of our licensing experts today.

Does California accept the NASCLA Accredited Commercial Contractor License?

Yes—with conditions. Non-California residents who want to work in the state may qualify to waive the California General Contractor (B) trade exam if they: 1) are licensed in another state, 2) have held that license in good standing for at least 5 years, and 3) have passed the NASCLA exam. However, California residents are still required to take the California-specific trade exam, regardless of any NASCLA credentials.

Is continuing education required of licensed contractors in California?

Yes. As of 2025, the California Contractors State License Board requires active general contractors to complete 5 hours of continuing education, focused on business management, construction law, or Cal/OSHA standards, during each 2-year license renewal cycle.

How long before I will have to renew my California license?

Typically, after two years, on the last day of the month when you acquired it.

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