HVAC contractor (warm-air heating, ventilating and air conditioning)s in Altadena, CA

9 licenses with the C-20 classification list Altadena (Los Angeles County) as their address with the state, 9 of them active. Active licenses with nothing flagged come first.

• ✓Action Duct Cleaning Company IncB · C-20 · C-43 · C-61/D-62 +1 · #570541 Altadena · Los Angeles County Active
• ✓Air Conditioning Solutions IncB · C-4 · C-20 · C-36 +1 · #863580 Altadena · Los Angeles County Active
• ✓Comfort Heating & Cooling SystemsC-20 · #707692 Altadena · Los Angeles County Active
• ✓Grueter Construction CorpB · C-6 · C-20 · #416414 Altadena · Los Angeles County Active
• ✓H & H Mechanical IncC-4 · C-20 · #644029 Altadena · Los Angeles County Active
• ✓Michael D HoweC-10 · C-20 · #522867 Altadena · Los Angeles County Active
• ✓Prime Air Mechanical IncC-20 · #1112002 Altadena · Los Angeles County Active
• ✓Simco Mechanical IncB · C-20 · C-36 · #974288 Altadena · Los Angeles County Active
• ✓Smalling Mechanical CoB · C-20 · #956042 Altadena · Los Angeles County Active

Source: CSLB license file, Nov 6, 2026All trades in Altadena