California Contractors State License Board · checked 2026-10-20
California HVAC License Requirements
The CSLB licenses heating and air conditioning businesses under C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor; commercial refrigeration falls under C-38 Refrigeration Contractor. C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor: 4 years of experience at minimum, plus an exam.
- 1C-20 · C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor 4 years
License levels in California
California has one credential on this path: the C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor. The source states the time in years.
| Level | Experience | Classroom | Time from start | Exam | Fees |
|---|---|---|---|---|---|
| C-20 C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor | 4 years | — | 4 years | Yes | Application $450; Initial license (sole owner) $200 |
C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor (C-20)
The qualifying individual needs at least four years of journeyman-level experience within the last ten years and must pass written law and trade examinations. Source: CSLB, Steps to become a licensed contractor.
California also issues narrower classes on the same page: C-38 Refrigeration Contractor.
Exam
1 of the 1 level listed here requires an exam: C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor. The source does not print a pass mark. An additional classification on an existing license costs $230.
Fees, insurance and bond
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor: application $450, initial license (sole owner) $200 ($650 together).
Fee source: CSLB Fees.
Bond: Contractor bond of $25,000 (effective January 1, 2023). (CSLB, Bond Requirements)
Reciprocity
The California sources read for this trade name no reciprocity agreement and no route for out-of-state licensees.
How California compares
Among the 8 states on this site that state a minimum time to the top hvac credential, California ranks 4 of 8 from shortest (1 year) to longest (5 years). Texas and Florida set the same 4 years.
Same trade elsewhere: Texas · Florida · Ohio · Georgia · North Carolina. All states side by side: HVAC license requirements by state.
Other trades in California
- Electrician: C-10 Electrical Contractor (CSLB): 4 years of experience at minimum, plus an exam.
- Plumber: C-36 Plumbing Contractor: 4 years of experience at minimum, plus an exam.
- General contractor: B General Building Contractor: 4 years of experience at minimum, plus an exam.
All covered trades on one page: California trade licenses.
Background reading: From apprentice to master: how long each state takes · What the license fees add up to.
Questions
Who issues the hvac license in California?
California Contractors State License Board. The CSLB licenses heating and air conditioning businesses under C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor; commercial refrigeration falls under C-38 Refrigeration Contractor.
How long does it take to qualify for the C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor in California?
4 years by this site's count. The qualifying individual needs at least four years of journeyman-level experience within the last ten years and must pass written law and trade examinations.
Does California have hvac license reciprocity?
The California sources read name no reciprocity agreement for this trade.
What are the California hvac license fees?
C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor: application $450, initial license (sole owner) $200.
Sources and last checked
| What | Source | Checked |
|---|---|---|
| Issuing authority | California Contractors State License Board | 2026-10-20 |
| C-20 requirements | CSLB, Steps to become a licensed contractor | 2026-10-20 |
| Law cited | CSLB C-20 and C-38 classifications | 2026-10-20 |
This page summarises what the California source said on 2026-10-20. It is general information, not legal advice; the board's own page and the statute are the authority and can change. Confirm with California Contractors State License Board before applying. The free official route is the board itself: its page, application forms and staff answer eligibility questions.