HVAC contractors in California — 6,760 companies across 289 cities, checked against the CSLB register.
California has 6,760 HVAC contractors listed across 289 cities, 6,621 of them matched to an active license on the California Contractors State License Board (CSLB) register. We check licenses against state records; we do not inspect workmanship. The license number must appear on all advertising, contracts, bid proposals and vehicles — Business and Professions Code §7030.5. Los Angeles, San Jose, Sacramento account for 13% of listings. See what HVAC replacement actually costs in California for the state-specific price breakdown.
How California licenses HVAC work
The license number must appear on all advertising, contracts, bid proposals and vehicles — Business and Professions Code §7030.5. Here is how to read a license, and what the class actually limits.
Warm-Air Heating, Ventilating and Air-Conditioning
Installs, services and repairs warm-air heating, ventilating and air-conditioning systems and their ducts, controls and filters — residential, commercial and industrial, no size limit.
Refrigeration
Commercial and process refrigeration below 50°F. A C-20 holder cannot do this work without also holding a C-38 — home comfort cooling and heating is C-20 territory, not C-38.
- A $25,000 contractor bond is required (an additional $100,000 bond applies to LLC-licensed contractors).
- CSLB licenses renew every two years and require proof of workers' compensation insurance if the contractor has employees.
- Minimum efficiency for new equipment: 14.3 SEER2 and 11.7 EER2 for split-system air conditioners under 45,000 BTU/h; 13.8 SEER2 and 11.2 EER2 at 45,000 BTU/h and above (DOE Southwest region, 2023 standard — the only region with an added EER2 floor on top of SEER2).
Where the contractors are
Listings and license-verified share for the 12 largest California markets. The share varies by how each city's data was matched, not by how honest its contractors are.
All 289 California cities, A–Z
Hiring HVAC help in California
Answers specific to state rules. City pages add the local permit and utility details.
What's the difference between a C-20 and a C-38 license?
C-20 covers comfort heating and cooling for a home — furnaces, central air, heat pumps and mini-splits. C-38 covers commercial refrigeration and process cooling below 50°F. A residential HVAC replacement only needs C-20; C-38 only matters if a contractor also services walk-in coolers or commercial refrigeration.
Why does California require an EER2 rating on top of SEER2?
California sits in the DOE's Southwest efficiency region, the only one of the four US regions with an added EER2 (Energy Efficiency Ratio 2) floor alongside the SEER2 minimum. EER2 measures efficiency at a single high-heat test condition rather than averaged over a season, which matters more in California's hot, dry interior than a seasonal average alone would capture.
How do I check a California HVAC license?
Ask the contractor for the license number and search it on the CSLB lookup (official site). Every verified profile on AirProHQ links straight to it, with the number already on the page.
Why is one California city mostly verified and another isn't?
It reflects how each listing reached us. Listings pulled straight from the license register verify at very high rates; listings that came from permit filings or public business profiles stay unverified until we can tie them to a license. A low share is a data gap, not a warning about the city.