- No license needed when the total for labor, materials and all other costs is less than $1,000, no building permit is needed and no employees are used.
- At least four years of journey-level, foreman, supervisor or contractor experience in the class within the last ten years. Education or apprenticeship can replace up to three years, but one year must be hands-on.
- Plan for a trade exam and a business and law exam.
- $25,000 contractor bond.
- Every two years when active.
Do you need a state license in California?
California licenses HVAC work at the state level through the Contractors State License Board (CSLB). Below is what the board asks for, in the order you will run into it.
No license needed when the total for labor, materials and all other costs is less than $1,000, no building permit is needed and no employees are used.
California license types for HVAC work
California splits the work into 2 licenses. Pick the one that matches the jobs you take, since working outside its scope is the same as working without one.
| License | What it covers |
|---|---|
| C-20 | Warm-air heating, ventilation and air conditioning systems, ducts, controls and heat pump water heaters |
| C-38 | Refrigeration systems and refrigerated rooms, with their units, ducts and controls, for temperatures below 50 degrees F |
Steps to get licensed in California
- Get four years of journey-level HVAC experience in the last ten years.
- Apply to CSLB for the C-20 exam and pay the $450 application fee.
- Get fingerprinted by Live Scan.
- Pass the law and business exam and the C-20 trade exam.
- File a $25,000 bond and workers' comp proof, and pay the initial license fee.
- Renew every two years.
Experience and other requirements
Experience. At least four years of journey-level, foreman, supervisor or contractor experience in the class within the last ten years. Education or apprenticeship can replace up to three years, but one year must be hands-on.
The license to apply for. C-20 Warm-Air Heating, Ventilating and Air-Conditioning.
California HVAC exams
Trade exam. Yes. C-20 trade exam.
Business and law exam. Yes. Law and business exam.
Separate from any state license, the EPA requires Section 608 certification for anyone who works on equipment with refrigerant. It is federal and applies in every state.
What it costs in California
The board lists 5 fees along the way. These are the state's own numbers. Insurance, any bond, exam prep and your business registration come on top.
| Fee | Amount |
|---|---|
| Application fee (one classification) | $450 |
| Initial license fee, sole owner | $200 |
| Initial license fee, non-sole owner | $350 |
| Active renewal, sole owner | $450 |
| Active renewal, non-sole owner | $700 |
Insurance and bond
Insurance. Workers' comp is required. C-20 contractors cannot claim the workers' comp exemption, even with no employees.
Bond. $25,000 contractor bond.
Renewal and licenses from other states
Renewal. Every two years when active.
Reciprocity. Several states have reciprocity agreements with California. CSLB lists equivalency determinations for similar Arizona, Louisiana and Nevada classifications.
Good to know in California
- Fingerprinting by Live Scan is part of the application; the operator sets its own fee on top of state and federal processing fees.
- EPA Section 608 certification is a separate federal requirement for refrigerant work.
After you are licensed
The license lets you take the work. Getting the work is the next job.
- Register the business. If you work under a name other than your own, register it where your state asks (often the Secretary of State, sometimes the county), and keep the name the same on your license, your truck and your invoices.
- Claim your Google Business Profile. It is the listing people see when they search for HVAC repair near them. Fill in your service area, hours and real photos of your work.
- Put up a website that shows the license. Customers look for it before they call. Koira builds a contractor website for you and keeps it current.
- See where you stand. The free Koira report checks how your business shows up in search and on maps against shops near you.
Where this comes from
Every fact on this page comes from the Contractors State License Board (CSLB) and the official pages below, checked October 8, 2026. Fees and rules change, so confirm with the board before you file.
More for your trade: how HVAC companies run on Koira.