Updated: May 07, 2026
Location and Projects
Address
3204 Rolling Green Dr., Churchville, MD, 21028
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Donald Edward Olkowski, Iv HVAC/Mechanical Contractor
Their BuildZoom score of 0 does not rank in the top 50% of Maryland contractors.
If you are thinking of hiring Donald Edward Olkowski, Iv, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Donald Edward Olkowski, Iv Contact Information
Address: 3204 Rolling Green Dr., Churchville, MD 21028
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Building Permits by Donald Edward Olkowski, Iv
This is a sample of this contractor's permits. Click here to access their complete permit history.
Upgrading service
Valuation:
$0
Permit #:
2014007E0050
Status:
Notice of Completion Issued
Fee:
N/A
Permit Type:
New
Building Type:
N/A
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Donald Edward Olkowski, Iv License info
License Not Verified
| License # | 66669 |
| Status | Active |
| State | Maryland |
- When BuildZoom last verified this license, it had an expiration date of December, 2013. Check the current license status of Donald Edward Olkowski, Iv with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 12008 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- When BuildZoom last verified this license, it had an expiration date of October, 2019. Check the current license status of Donald Edward Olkowski, Iv with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 12008 |
| Status | Inactive |
| State | Maryland |
| Type | Electricians |
- According to the Maryland Department of Labor, Licensing & Regulation, 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 Donald Edward Olkowski, Iv at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
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Donald Edward Olkowski, Iv Employees
DI
Donald E Olkowski Iii
Owner
DI
Donald Edward Olkowski, Iv
Owner