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Sigma HVAC Company
Sigma HVAC Company, 2733 Darlene Ct, Castro Valley, CA (Employee: Hao Wu) holds a Warm Air Heating, Ventilating And Air Conditioning, General Building, Electrical license and 1 other license according to the California license board.
Their BuildZoom score of 93 ranks in the top 27% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Sigma HVAC Company, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Sigma HVAC Company Contact Information
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Sigma HVAC Company License info
Verified License
| License # | 1128583 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, General Building, Electrical |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Sigma HVAC Company at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1062867 |
| Status | Inactive |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, General Building, Electrical |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Sigma HVAC Company at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |