California Boiler, Hot Water Heating and Steam Fitting (C-4) Contractor License

The California Boiler, Hot Water Heating and Steam Fitting (C-4) contractor license allows you to install, service and repair power boiler installations, hot-water heating systems and steam fitting, including fire-tube and water-tube steel power boilers and hot-water heating low pressure boilers, steam fitting and piping, fittings, valves, gauges, pumps, radiators, convectors, fuel oil tanks, fuel oil lines, chimneys, flues, heat insulation and all other equipment, including solar heating equipment, associated with these systems.

How to get the Boiler, Hot Water Heating and Steam Fitting (C-4) 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 Boiler, Hot Water Heating and Steam Fitting (C-4) 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 Boiler, Hot Water Heating and Steam Fitting (C-4) 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 Boiler, Hot Water Heating and Steam Fitting (C-4) Contractor License Exam Prep Courses

California Boiler, Hot Water Heating and Steam Fitting (C-4) Contractor License Exam

Below are the specifications (test type, academic content, etc.) for each exam needed to get the Boiler, Hot Water Heating and Steam Fitting (C-4) contractor's license in California.

California Boiler, Hot Water Heating and Steam Fitting (C-4) Exam

  • Testing Method: Computer-based testing; closed book
  • Testing Company: CSLB
  • Types of Questions: Multiple choice
  • Subjects Involved:
    • Planning and Estimation (19%)
      • Plan boiler projects
      • Estimate boiler projects
    • Boiler System Removal, Preparation, and Installation (33%)
      • Remove old boiler systems
      • Prepare job site for new boiler systems
      • Install new boiler systems
      • Test and complete boiler systems
    • Specialty Boiler Installation (11%)
      • Commercial boiler systems
      • Industrial boiler systems
      • School and hospital boiler systems
      • Residential hydronic boiler systems
    • Boiler System Maintenance, Repair, and Retrofit (15%)
      • Maintain boiler systems
      • Repair boiler systems
      • Retrofit boiler systems
    • Safety (22%)
      • Personnel safety
      • Job site safety
      • Confined space work
      • Dangerous materials
  • CSLB Boiler, Hot Water Heating and Steam Fitting (C-4) 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 Boiler, Hot Water Heating and Steam Fitting (C-4) Contractor Book Set

The book set includes all source references for the California Boiler, Hot Water Heating and Steam Fitting (C-4) 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.

  • CALIFORNIA BOILER, HOT WATER HEATING AND STEAM FITTING (C-4) - BOOK SET WITHOUT TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $1,081.10
  • CALIFORNIA BOILER, HOT WATER HEATING AND STEAM FITTING (C-4) - BOOK SET WITH TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $1,181.10

California Boiler, Hot Water Heating and Steam Fitting (C-4) Contractor Exam Books

California Law and Business Exam Books