Updated: Jul 14, 2026
Location and Projects
Address
Grand Rapids, MI, 49504
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Sieh William G Jr HVAC/Mechanical Contractor
Serving the Grand Rapids, Michigan area, Sieh William G Jr specializes in residential construction projects. With two years of activity in the industry, the business focuses on new home builds, home additions, and remodels for single-family properties. Project types documented in the local area include structural additions, interior renovations, and exterior updates tailored to the needs of homeowners in Grand Rapids and surrounding neighborhoods. Sieh William G Jr operates as a general contractor, managing various aspects of the construction process for residential clients. The company coordinates all phases of project development, from initial planning through completion, and works with property owners to update and expand existing homes. Experience with local permit processes ensures that all work meets Grand Rapids building standards and regulations.
Sieh William G Jr Contact Information
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Furnace replacement for 2 water heaters & furnace replacement
Valuation:
N/A
Permit #:
BR-MEC-2025-1125
Status:
final
Fee:
$111
Permit Type:
N/A
Building Type:
N/A
3 water heater replacements in basement of listed address
Valuation:
N/A
Permit #:
BR-MEC-2025-1123
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
3 water heater replacements in basement for triplex
Valuation:
N/A
Permit #:
BC-MEC-2025-1124
Status:
final
Fee:
$111
Permit Type:
N/A
Building Type:
N/A
Residential mechanical safety inspection: 1-15 dwellings
2025-04-01
Mechanical safety inspection report
Valuation:
N/A
Permit #:
MSI-2025-01068
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential mechanical safety inspection: 1-15 dwellings
2025-04-01
Mechanical safety inspection report
Valuation:
N/A
Permit #:
MSI-2025-01067
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential mechanical safety inspection: 1-15 dwellings
2025-03-13
Mechanical safety inspection report
Valuation:
N/A
Permit #:
MSI-2025-00856
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential mechanical safety inspection: 1-15 dwellings
2025-03-11
Mechanical safety inspection report
Valuation:
N/A
Permit #:
MSI-2025-00809
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install new electric water heater
Valuation:
N/A
Permit #:
BR-MEC-2024-4431
Status:
final
Fee:
$71
Permit Type:
N/A
Building Type:
N/A
Residential mechanical safety inspection: 1-15 dwellings
2024-11-24
Mechanical safety inspection report
Valuation:
N/A
Permit #:
MSI-2024-03073
Status:
triage
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace furnace in dwelling
Valuation:
N/A
Permit #:
BR-MEC-2024-4329
Status:
final
Fee:
$71
Permit Type:
N/A
Building Type:
N/A
Replace furnace in dwelling
Valuation:
N/A
Permit #:
BR-MEC-2024-3965
Status:
final
Fee:
$112
Permit Type:
N/A
Building Type:
N/A
Replace furnace in dwelling
Valuation:
N/A
Permit #:
BR-MEC-2024-3964
Status:
final
Fee:
$112
Permit Type:
N/A
Building Type:
N/A
2 water heaters
Valuation:
N/A
Permit #:
BR-MEC-2024-4372
Status:
final
Fee:
$91
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Sieh William G Jr License info
Verified License
| License # | 2101069198 |
| Status | Active |
| State | Michigan |
| Type | Residential Builder Individual |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Sieh William G Jr 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 # | 7104937 |
| Status | Active |
| State | Michigan |
| Type | Mechanical Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Sieh William G Jr 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 # | 6219691 |
| Status | Active |
| State | Michigan |
| Type | Electrical |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Sieh William G Jr 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 # | 6114847 |
| Status | Active |
| State | Michigan |
| Type | Electrical Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Sieh William G Jr 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 # | 7104937 |
| Status | Active |
| State | Michigan |
| Type | Mechanical Contractor |
- When BuildZoom last verified this license, it had an expiration date of August, 2025. Check the current license status of Sieh William G Jr 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 # | 2101069198 |
| Status | Active |
| State | Michigan |
| Type | Residential Builder Individual |
- When BuildZoom last verified this license, it had an expiration date of May, 2026. Check the current license status of Sieh William G Jr 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 # | 6219691 |
| 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 Sieh William G Jr 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 # | 6114847 |
| Status | Active |
| State | Michigan |
| Type | Electrical Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Sieh William G Jr with the Michigan Department of Licensing & Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 2101069198 |
| Status | Inactive |
| State | Michigan |
| Type | Builder Individual |
- According to the Michigan Department of Licensing & Regulatory Affairs, 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 Sieh William G Jr at the Michigan Department of Licensing & Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Sieh William G Jr Employees
WS
William Sieh
Owner
WS
William G Sieh