HVAC contractor (warm-air heating, ventilating and air conditioning)s in Castro Valley, CA
11 licenses with the C-20 classification list Castro Valley (Alameda County) as their address with the state, 11 of them active. Active licenses with nothing flagged come first.
- 4-Seasons Heating & Air ConditioningC-20 · #962971 Castro Valley · Alameda County Active
- Affordable Heating and Air ConditioningC-20 · #909632 Castro Valley · Alameda County Active
- B A MorrisonB · C-20 · #603913 Castro Valley · Alameda County Active
- California BuildersB · C-10 · C-16 · C-20 +2 · #988161 Castro Valley · Alameda County Active
- Cheng'S Mechanical ContractorC-20 · #1036153 Castro Valley · Alameda County Active
- Frank Bonetti Plumbing IncC-4 · C-20 · C-34 · C-36 +1 · #251165 Castro Valley · Alameda County Active
- M1 Mechanical CorpC-20 · #1129897 Castro Valley · Alameda County Active
- Sigma HVAC & Electric IncB · C-10 · C-20 · #1128583 Castro Valley · Alameda County Active
- Specialized Heating & Air ConditioningC-20 · #741785 Castro Valley · Alameda County Active
- Triton HVAC & Appliance RepairC-20 · #1138925 Castro Valley · Alameda County Active
- Various EnergyA · B · C-10 · C-20 · #1145723 Castro Valley · Alameda County Active Disciplinary bond on file
Source: CSLB license file, Nov 6, 2026All trades in Castro Valley