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California Plumbing (C-36) Contractor License

The California Plumbing (C-36) contractor license allows you to provide a means for a supply of safe water, ample in volume and of suitable temperature for the purpose intended and the proper disposal of fluid waste from the premises in all structures and fixed works. California Plumbing contractors can work on waste removal, on-site sewage, piping, storage tanks, venting, vacuum, medical gas, flues/gas connections, suspended heating units (no forced warm air units!), water/gas piping, and solar equipment.

How to get the Plumbing (C-36) contractor's license in California?

  1. Determine Eligibility: Each license requires a qualifier who directly supervises and controls the construction operations conducted under the license. Must be at least 18 years old and have four years minimum journeyperson, foreperson, supervising employee, or contractor work experience, in the last 10 years, in the Plumbing (C-36) trade.
  2. Verifying Work Experience: After meeting the basic eligibility requirements, the qualifier could be randomly selected to provide documentation that they meet the minimum work experience requirements. Having this documentation ready beforehand can make this process easier if your application is selected for review. The experience listed on the application must be verifiable, and people with firsthand knowledge of that experience must certify the accuracy of the information provided to CSLB on the Certification of Work Experience form.
  3. Complete Application: Must fill out the Original Contractor, Additional Classification, or Replacing the Qualifying Individual application form.
  4. Submit Application and Required Fees: For the current list of fees visit the California CSLB Fees page.
  5. Fingerprint Requirement after CSLB Review of Application: For information on fingerprinting, visit the CSLB Fingerprinting Requirement page.
  6. Schedule the Exams: Once the application is submitted the CSLB will send you a 'Notice to Appear for Examination." Upon receipt, the business exam and a Plumbing (C-36) exams must be scheduled and passed.
  7. Contractor Bond: All applicants must submit to CSLB a contractor bond or cash deposit payable to CSLB in the amount of $15,000. CSLB does not issue bonds.

The CSLB will either issue your license or contact you if they need further information.

California Plumbing (C-36) Contractor License Exam Prep Courses

California Plumbing (C-36) Contractor License Exam

Below are the specifications (test type, academic content, etc.) for each exam needed to get the Plumbing (C-36) contractor's license in California.

California Plumbing (C-36) Exam

  • Testing Method: Computer-based testing; closed book
  • Testing Company: CSLB
  • Types of Questions: Multiple choice
  • Subjects Involved:
    • Planning and Estimating (21%)
      • Plan reading
      • Bidding
      • Pipe sizing
      • Water conservation
    • Rough-in and Top Out Plumbing Systems (26%)
      • Underground installations
      • Piping layout
      • Piping installation
      • Fuel gas piping
    • Finish Plumbing Installations (15%)
      • Plumbing fixtures
      • Water heaters
      • Shut-off valves
      • Specialty installations
      • Industrial piping
    • Service, Repair, and Remodel Plumbing Systems (20%)
      • Troubleshooting plumbing
      • Isolating leaks and damage
      • Repairing plumbing
      • Retrofitting plumbing
    • Safety (18%)
      • Job site safety
      • Personnel safety
      • Public safety
  • CSLB Plumbing (C-36) Study Guide

California Law and Business Exam

  • Testing Method: Computer-based testing; closed book
  • Testing Company: CSLB
  • Types of Questions: Multiple choice
  • Subjects Involved:
    • Business Organization (10%)
      • Company organization
      • Project organization
    • Business Finances (15%)
      • Cash management
      • Budget and planning
      • Taxes
      • Financial reporting
    • Employment Requirements (12%)
      • Employment regulations
      • Evaluation and record-keeping
      • Payroll
    • Bonds, Insurance, and Liens (10%)
      • Bonds
      • Workers’ compensation insurance
      • Liens and other remedies
      • Other insurance
    • Contract Requirements and Execution (23%)
      • Bidding
      • Cost control
      • Contracts
      • Payments
    • Licensing Requirements (8%)
      • Business license
      • Contractor’s license
      • Activity regulation
    • Safety (15%)
      • Training and reporting requirements
      • General safety
      • Hazardous/unknown materials
    • Public Works (7%)
      • Prevailing wage requirements
      • Bonding requirements
      • Insurance requirements
  • CSLB Law and Business Study Guide

California Plumbing (C-36) Contractor Book Set

The book set includes all source references for the California Plumbing (C-36) Contractor exams. You can use these books to study for the exams but you are not allowed to bring these books in with you to the testing center. These tests will be closed-book. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.


    Sales price: $1,619.30

    Sales price: $1,719.30

California Plumbing (C-36) Contractor Exam Books

California Law and Business Exam Books