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Licensed HVAC contractors in Altadena, CA (C-20)
4 new licenses for Warm-Air Heating, Ventilating & Air-Conditioning (HVAC) (C-20) across SoCal
Issued Oct 16 – Oct 22, 2026.
See all licensed HVAC contractors in Los Angeles County, by city.
Quick facts
How many licensed HVAC contractors are in Altadena, CA?
9 HVAC contractors with a California CSLB license list a business address in Altadena, CA. 9 of them have an active license in good standing (CSLB data as of 10/22/2026).
How many HVAC contractors in Altadena, CA have a license problem right now?
None are flagged right now. 2 active licenses expire within 90 days. Each listing below shows the status and a plain-English OK-to-hire verdict.
How do I check if a HVAC contractor is licensed?
Search the business name or license number on LicenseWatch CA to see license status, bond and workers' comp in one place, then confirm on the CSLB website before you sign a contract. In California, work over $1,000 in labor and materials requires a licensed contractor.
Featured spot open for HVAC contractors in AltadenaOne licensed HVAC contractor can sit above this list, labeled sponsored. Founding rate $1.90 a month. See what you get
Claim this spot| Business | License | Status | Expires |
|---|---|---|---|
| Action Duct Cleaning Company Inc | 570541 | Active | 06/30/2027 |
| Air Conditioning Solutions Inc | 863580 | Active | 08/31/2027 |
| Comfort Heating & Cooling Systems | 707692 | Active | 08/31/2028 |
| Grueter Construction Corp | 416414 | Active | 04/30/2028 |
| H & H Mechanical Inc | 644029 | Active | 12/31/2026 |
| Michael D Howe | 522867 | Active | 01/31/2028 |
| Prime Air Mechanical Inc | 1112002 | Active | 10/31/2027 |
| Simco Mechanical Inc | 974288 | Active | 06/30/2028 |
| Smalling Mechanical Co | 956042 | Active | 12/31/2026 |
New and lapsed SoCal licenses, every Monday
New licenses, expirations and workers' comp lapses across five counties. One short email a week.