California HVAC license lookup: how to check and get a license
California HVAC license lookup: who issues HVAC contractor licenses (CSLB), how to check one online, the license types, and 11,683 plumbing, heating and air-conditioning contractors by county.
Do HVAC contractors need a license in California?
| Who licenses them | Contractors State License Board (CSLB) |
|---|---|
| License types | C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor |
| When a license is required | Contractor license required for jobs of $1,000 or more, or any job that needs a permit (HVAC replacements generally do), or where the worker uses employees. Written contract required for home improvement jobs over $500; down payment capped at 10% or $1,000, whichever is less. |
Confirm an active C-20 classification and the $25,000 CSLB bond. Technicians who handle refrigerant must also hold federal EPA Section 608 certification.
How do you look up an HVAC contractor's license in California?
- Ask the HVAC contractor for the license number and the exact business name on the license.
- Open the California HVAC license lookup run by CSLB.
- Search by license number first. A name search can return several people or companies with similar names.
- Check that the status is active or current, that the license type covers your job, and that the name matches the company on your contract.
- If something doesn't match, ask the HVAC contractor about it before you sign or pay a deposit, or contact CSLB.
What HVAC licenses does California issue?
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor
How do you get a HVAC license in California?
Licenses are issued by the Contractors State License Board (CSLB). Requirements such as experience, exams, insurance and fees change, so read the current rules on the official CSLB source before you apply. Already licensed? List your business on Expert Helper to get matched with customers.
Which California city is the job in?
How many HVAC contractors are there in California?
The Census Bureau counted 11,683 plumbing, heating and air-conditioning contractors with employees in California in 2023. The counties with the most:
| Los Angeles County | 2,765 |
|---|---|
| San Diego County | 1,072 |
| Orange County | 1,028 |
| Riverside County | 879 |
| San Bernardino County | 563 |
| Santa Clara County | 512 |
| Sacramento County | 461 |
| Alameda County | 373 |
What do California homes mean for heating and cooling work?
The median home in California was built in 1976, 44% of households rent and 65% of homes are single-family houses. 62% of homes heat with utility gas and 29% with electricity.
How do you choose an HVAC contractor in California?
- Check the state or local mechanical or HVAC license, and ask whether the technicians hold EPA 608 certification for refrigerant work.
- For a new system, ask for a load calculation (often called Manual J) rather than a size picked from square footage.
- Ask which rebates and tax credits apply to heat pumps and high-efficiency equipment, and whether the contractor files the paperwork.
- Compare quotes on the same equipment model numbers and efficiency ratings (SEER2, HSPF2, AFUE).
- Ask what the labor warranty covers, separately from the manufacturer's parts warranty.
HVAC Contractors in other states
Sources: California licensing agency (linked above); US Census Bureau County Business Patterns 2023 and ACS 2023 5-year estimates.