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HVAC license · California

How to get an HVAC contractor license in California: the official requirements

The C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor License license, the experience and training it takes, the exam and how to apply, from the Contractors State License Board.

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Updated Nov 9, 2026 · Requirements: each state's HVAC licensing authority or its rules
Quick answer

In California, the statewide HVAC license is a contractor license, issued by the Contractors State License Board. California's HVAC contractor license is the C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license from the Contractors State License Board. A license is required when a project needs a building permit, uses additional workers or reaches the Board's minimum total cost of labor and materials; an employee paid wages who does not control the work is exempt. A qualifying individual meets the experience and exam requirements for the license. Experience and training: At least four full years of experience in the classification within the ten years before applying, at journey level or as a foreman, supervising employee, contractor or owner-builder. A journeyman is a fully qualified worker who can do the trade without supervision, or someone who has completed an apprenticeship. A qualified person who observed your work must certify the experience. Licensing exam: The Law and Business examination and the trade examination, scheduled and paid for directly with PSI after CSLB accepts your application. You have 18 months after acceptance to pass. How to apply: Send the Application for Original Contractor's License (or the online sole owner application) with the Certification of Work Experience form to CSLB. After passing, submit what the bond and fee letter asks for, which may include the initial license fee, a contractor bond, workers' compensation proof or exemption and the asbestos open-book examination.

Requirements

California HVAC contractor license requirements

Data
California HVAC license requirements (Contractors State License Board)
RequirementCalifornia
License you apply forCalifornia's HVAC contractor license is the C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license from the Contractors State License Board. A license is required when a project needs a building permit, uses additional workers or reaches the Board's minimum total cost of labor and materials; an employee paid wages who does not control the work is exempt. A qualifying individual meets the experience and exam requirements for the license.
Apprentice or trainee registrationNot stated in the official source we read. Check with the Contractors State License Board.
Experience and trainingAt least four full years of experience in the classification within the ten years before applying, at journey level or as a foreman, supervising employee, contractor or owner-builder. A journeyman is a fully qualified worker who can do the trade without supervision, or someone who has completed an apprenticeship. A qualified person who observed your work must certify the experience.
Classroom hoursNo education requirement; up to three years of technical training, apprenticeship training or education can be credited toward the four years of experience, but at least one year must be practical experience.
Licensing examThe Law and Business examination and the trade examination, scheduled and paid for directly with PSI after CSLB accepts your application. You have 18 months after acceptance to pass.
How to applySend the Application for Original Contractor's License (or the online sole owner application) with the Certification of Work Experience form to CSLB. After passing, submit what the bond and fee letter asks for, which may include the initial license fee, a contractor bond, workers' compensation proof or exemption and the asbestos open-book examination.
Background checkEvery license applicant submits fingerprints (Live Scan) so the Board can run a criminal background check against California Department of Justice and FBI records.
State feesOriginal application: $450. Initial license fee: $200 (sole owner) or $350 (non-sole owner). Active timely renewal: $450 (sole owner) or $700 (non-sole owner). Fingerprint processing and Live Scan fees are paid to the Live Scan operator and exam fees to PSI.
License termTwo years; the initial license fee covers the license for two years.
Continuing educationNot stated in the official source we read. Check with the Contractors State License Board.

Where the official source we read does not state something, the table says so rather than guessing. Fees shown are the licensing authority's own. Fees charged by exam vendors, schools, apprenticeship programs, fingerprint vendors and application portals are not included.

This page covers the HVAC license issued by the state. Cities and counties can have their own registration, permit or license rules; ask the local building department where you will work.

Steps

How to get licensed in California

Data
  1. Gain four years of journey-level (or foreman, supervisor or contractor) experience in HVAC (C-20) within the last ten years.
  2. Have someone who observed your work complete the Certification of Work Experience form.
  3. Submit the original license application with the $450 application processing fee to CSLB.
  4. Get fingerprinted by Live Scan after the application is accepted.
  5. Schedule and pass the Law and Business and trade exams with PSI within 18 months.
  6. Meet the issuance requirements in the bond and fee letter (license fee, $25,000 contractor bond, workers' compensation, asbestos open-book exam).
Next

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FAQ

Questions people ask

How do I get an HVAC contractor license in California?
In California, the statewide HVAC license is a contractor license, issued by the Contractors State License Board. California's HVAC contractor license is the C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license from the Contractors State License Board. A license is required when a project needs a building permit, uses additional workers or reaches the Board's minimum total cost of labor and materials; an employee paid wages who does not control the work is exempt. A qualifying individual meets the experience and exam requirements for the license. Experience and training: At least four full years of experience in the classification within the ten years before applying, at journey level or as a foreman, supervising employee, contractor or owner-builder. A journeyman is a fully qualified worker who can do the trade without supervision, or someone who has completed an apprenticeship. A qualified person who observed your work must certify the experience. Licensing exam: The Law and Business examination and the trade examination, scheduled and paid for directly with PSI after CSLB accepts your application. You have 18 months after acceptance to pass. How to apply: Send the Application for Original Contractor's License (or the online sole owner application) with the Certification of Work Experience form to CSLB. After passing, submit what the bond and fee letter asks for, which may include the initial license fee, a contractor bond, workers' compensation proof or exemption and the asbestos open-book examination.
What experience do I need for a California HVAC contractor license?
At least four full years of experience in the classification within the ten years before applying, at journey level or as a foreman, supervising employee, contractor or owner-builder. A journeyman is a fully qualified worker who can do the trade without supervision, or someone who has completed an apprenticeship. A qualified person who observed your work must certify the experience.
Is there an apprentice or trainee license in California?
Not stated in the official source we read. Check with the Contractors State License Board.
Do I need to pass an exam for a California HVAC contractor license?
The Law and Business examination and the trade examination, scheduled and paid for directly with PSI after CSLB accepts your application. You have 18 months after acceptance to pass.
How long is a California HVAC contractor license good for?
Two years; the initial license fee covers the license for two years.
How much does a California HVAC contractor license cost?
Original application: $450. Initial license fee: $200 (sole owner) or $350 (non-sole owner). Active timely renewal: $450 (sole owner) or $700 (non-sole owner). Fingerprint processing and Live Scan fees are paid to the Live Scan operator and exam fees to PSI. Fees shown are the licensing authority's own. Fees charged by exam vendors, schools, apprenticeship programs, fingerprint vendors and application portals are not included.
Method

How this page is built

Each fact on this page comes from the Contractors State License Board (sources named below), read on the dates shown, with the exact wording we relied on kept on file. Requirements and fees change; the Contractors State License Board's current instructions govern. We re-read each state's sources every six months (next review by May 10, 2027).

What this page can't tell you
  • Not legal advice.
  • Licensing rules can change. Verify current requirements with the issuing agency.
  • Fees shown are the licensing authority's own. Fees charged by exam vendors, schools, apprenticeship programs, fingerprint vendors and application portals are not included.
  • This page covers the HVAC license issued by the state. Cities and counties can have their own registration, permit or license rules; ask the local building department where you will work.
  • This page covers the contractor license named above. Specialty, limited and out-of-state (reciprocity) licenses have their own rules.
Sources
  1. Contractors State License Board, C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor (California Code of Regulations Title 16, Division 8, Article 3), official source, read Nov 9, 2026.
  2. Contractors State License Board, Step 1: Before Applying for the Examination, official source, read Nov 9, 2026.
  3. Contractors State License Board, Step 2: Applying for the Examination, official source, read Nov 9, 2026.
  4. Contractors State License Board, Step 3: Qualifying Experience for the Examination, official source, read Nov 9, 2026.
  5. Contractors State License Board, Step 5: My Original Exam Application was Accepted, official source, read Nov 9, 2026.
  6. Contractors State License Board, Step 6: Get Fingerprinted/Live Scan, official source, read Nov 9, 2026.
  7. Contractors State License Board, Step 8: Issuing My License, official source, read Nov 9, 2026.
  8. Contractors State License Board, List of All CSLB Fees, official source, read Nov 9, 2026.