Updated: Nov 25, 2025
Location
Address
Houghton, MI, 49931
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John E Koski Electrician
John E Koski, Houghton, MI holds a Plumbing Contractor license and 4 other licenses according to the Michigan license board.
Their BuildZoom score of 90 indicates that they are licensed or registered but we do not have additional information about them.
Their license was verified as active when we last checked. If you are thinking of hiring John E Koski, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
John E Koski Contact Information
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Verified License
BuildZoom confirmed this contractor's license
John E Koski License info
License Not Verified
| License # | 8107659 |
| Status | Active |
| State | Michigan |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of April, 2022. Check the current license status of John E Koski with the Michigan Department of Licensing & Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 8107659 |
| Status | Active |
| State | Michigan |
| Type | Plumbing |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for John E Koski at the Michigan Department of Licensing & Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 6204218 |
| Status | Active |
| State | Michigan |
| Type | Electrical |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for John E Koski at the Michigan Department of Licensing & Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 8107659 |
| Status | Active |
| State | Michigan |
| Type | Plumbing |
- When BuildZoom last verified this license, it had an expiration date of April, 2025. Check the current license status of John E Koski with the Michigan Department of Licensing & Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 6204218 |
| Status | Active |
| State | Michigan |
| Type | Electrical |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of John E Koski with the Michigan Department of Licensing & Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.