Updated: Jul 05, 2026
Location and Projects
Address
250 W MAIN ST, Delafield, WI, 53018
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Grenz Service Company HVAC/Mechanical Contractor
Grenz Service Company, LLC, 250 W Main St, Delafield, WI (Owned by: James Lee Grenz) holds a Hvac Contractor, Regular, False license and 2 other licenses according to the Wisconsin Rapids license board.
Their BuildZoom score of 102 ranks in the top 11% of 94,017 Wisconsin licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Grenz Service Company, LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Grenz Service Company, LLC Contact Information
Phone Number: (262) 646-3880
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Address: 250 W MAIN ST, Delafield, WI 53018
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Grenz Service Company, LLC Delafield
Quality
102
89th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Grenz Service Company, LLC has a BuildZoom score of 102, which places them above 89% of 94,017 contractors in Wisconsin.
Activity
|
4 projects
|
2025 |
|
3 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Grenz Service Company, LLC has worked on at least
8.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
8 projects
|
HVAC projects |
|
5 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Grenz Service Company, LLC mostly works on
hvac project
and mechanical project
projects.
Pricing
|
4 projects
|
$5k-$20k |
|
1 project
|
$20k-$50k |
The typical size of their permits is approximately $12,746. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Building Permits by Grenz Service Company, LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace furnace and air conditioning equipment
Valuation:
$22,966
Permit #:
E_FURN25-00198
Status:
issued
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Replace furnace and air conditioning equipment
Valuation:
$19,635
Permit #:
E_FURN25-00073
Status:
final
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Replace majic pac (heat & air conditioning package unit)
Valuation:
$7,050
Permit #:
E_FURN24-00278
Status:
issued
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Replace furnace & air conditioning
Valuation:
N/A
Permit #:
PH25-0482
Status:
issued
Fee:
$115
Permit Type:
HVAC
Building Type:
N/A
Replace furnace and air conditioning equipment
Valuation:
$12,498
Permit #:
E_FURN24-00650
Status:
issued
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Replace air conditioning
Valuation:
N/A
Permit #:
PH25-0481
Status:
issued
Fee:
$65
Permit Type:
HVAC
Building Type:
N/A
Replace furnace and air conditioning units
Valuation:
$12,746
Permit #:
E_FURN24-00285
Status:
canceled
Fee:
$70
Permit Type:
N/A
Building Type:
N/A
Replace furnace and air conditioning units
Valuation:
$12,746
Permit #:
E_FURN24-00279
Status:
final
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Replace majic pac (heat & air conditioning package unit)
Valuation:
$7,050
Permit #:
E_FURN24-00297
Status:
final
Fee:
$70
Permit Type:
N/A
Building Type:
N/A
Replace air conditioning
Valuation:
$5,365
Permit #:
E_FURN22-00402
Status:
final
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace hvac equipment
Valuation:
$12,125
Permit #:
E_FURN20-00243
Status:
final
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Furnace
Valuation:
N/A
Permit #:
ELR16-02365
Status:
final
Fee:
$90
Permit Type:
N/A
Building Type:
N/A
Reaplce furnace and air conditioning
Valuation:
N/A
Permit #:
PH22-0099
Status:
expired
Fee:
$110
Permit Type:
HVAC
Building Type:
N/A
Replace air conditioning unit
Valuation:
$5,152
Permit #:
E_FURN22-00621
Status:
expired
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Replace natural gas furnace
Valuation:
$7,910
Permit #:
E_FURN22-00890
Status:
expired
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
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Grenz Service Company, LLC Reviews
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Verified License
BuildZoom confirmed this contractor's license
Grenz Service Company, LLC License info
Verified License
| License # | 3668 - HVACCONT |
| Status | Active |
| City | Wisconsin Rapids |
| Type | Hvac Contractor, Regular, False |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Grenz Service Company, LLC at the City of Wisconsin Rapids.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 3668-HVACCONT |
| Status | Active |
| State | Wisconsin |
| Type | Hvac Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Grenz Service Company, LLC at the Wisconsin Department of Safety and Professional Services.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 3668 |
| Status | Inactive |
| City | Milwaukee |
| Type | Hvac Contractor |
- According to the City of Milwaukee License Search, 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 Grenz Service Company, LLC at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
102
BuildZoom Score
13
Permits
- Building permit records show that Grenz Service Company, LLC has worked on 13 permitted projects.
Grenz Service Company, LLC Employees
JG
James Grenz
JG
James Lee Grenz
Owner