Updated: Jul 22, 2026
Location
Address
1123 ALLEN AVE, Glendora, CA, 91740
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Optimum Heating & Air Conditioning
Optimum Heating & Air Conditioning, 1123 Allen Ave, Glendora, CA (Owned by: John David Preston) holds a Warm Air Heating, Ventilating And Air Conditioning 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 Optimum Heating & Air Conditioning, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Optimum Heating & Air Conditioning Services
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Optimum Heating & Air Conditioning Contact Information
Phone Number: (925) 448-7291
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Address: 1123 ALLEN AVE, Glendora, CA 91740
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Verified License
BuildZoom confirmed this contractor's license
Optimum Heating & Air Conditioning License info
Verified License
| License # | 856737 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning |
| Business Type | Sole Ownership, Corporation |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Optimum Heating & Air Conditioning at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1005514 |
| Status | Inactive |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning |
| Business Type | Sole Ownership, Corporation |
- 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 Optimum Heating & Air Conditioning 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 | Nationwide Mutual Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Norguard Insurance Company |
Optimum Heating & Air Conditioning Employees
JP
John David Preston
Owner
MC
Michael Gene Camper
Rmo / Ceo / Pres