Updated: Jul 14, 2026
Location and Projects
Address
328 W Gartner, Naperville, IL, 60540
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Optimal HVAC
Optimal HVAC, 328 W Gartner, Naperville, IL (Owned by: William De Schaaf) holds a Contractor Registration license and 1 other license according to the Illinois license board.
Their BuildZoom score of 97 ranks in the top 18% of 65,686 Illinois licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Optimal HVAC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Optimal HVAC Contact Information
Phone Number: (630) 800-6603
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Address: 328 W Gartner, Naperville, IL 60540
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Remodel repair
Valuation:
N/A
Permit #:
2503357
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Remodel repair
Valuation:
N/A
Permit #:
2501962
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Remodel repair
Valuation:
N/A
Permit #:
2400096
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Remodel repair
Valuation:
N/A
Permit #:
2502433
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
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Optimal HVAC Reviews
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Verified License
BuildZoom confirmed this contractor's license
Optimal HVAC License info
Verified License
| License # | CR-10878 |
| Status | Active |
| Type | Contractor Registration |
| Date Issued | 02-06-2026 |
- BuildZoom verified this license was active as of March 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | CR0003414 |
| Status | Active |
| County | Dupage County |
| Type | Sub Contractor, Hvac |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Optimal HVAC at the County of Dupage Contractor Registration Information.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Optimal HVAC Employees
OH
Optimal Hvac
Licensee
WS
William De Schaaf
Owner