Updated: Jun 01, 2026
Location and Projects
Address
855 MORRIS ST PO BOX 1316, Fond Du Lac, WI, 54935
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Ahern Jf Architect
Ahern Jf Co, 855 Morris St, Po Box 1316, Fond Du Lac, WI (Owned by: John Klinzing) holds a Hvac Contractor, Regular, False license and 29 other licenses according to the Wisconsin Rapids license board.
Their BuildZoom score of 112 ranks in the top 3% of 94,017 Wisconsin licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Ahern Jf Co, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Ahern Jf Co Services
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Ahern Jf Co Contact Information
Phone Number: (414) 921-7352
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Address: 855 MORRIS ST PO BOX 1316, Fond Du Lac, WI 54935
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Ahern Jf Co Fond Du Lac
Quality
112
97th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Ahern Jf Co has a BuildZoom score of 112, which places them above 97% of 94,017 contractors in Wisconsin.
Activity
|
5 projects
|
2026 |
|
174 projects
|
2025 |
|
217 projects
|
2024 |
|
212 projects
|
2023 |
Our building permit records indicate that Ahern Jf Co has worked on at least
608.0 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
|
23 projects
|
Commercial Renovations |
|
21 projects
|
Home Additions |
|
19 projects
|
New Constructions |
Analyzing permits over the last 4 years shows that Ahern Jf Co mostly works on
commercial renovation
and home addition
projects.
Pricing
|
26 projects
|
< $5k |
|
50 projects
|
$5k-$20k |
|
29 projects
|
$20k-$50k |
|
18 projects
|
$50k-$100k |
|
16 projects
|
$100k-$250k |
|
15 projects
|
$250k-$500k |
|
6 projects
|
$500k-$1mil |
|
14 projects
|
$1mil+ |
The typical size of their permits is approximately $33,675. 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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Providing and installing all necessary equipment materials and labor for a new hvac system as part of a renovation to the existing building as well as completing system controls insulation and testing and balancing
Valuation:
$42,644
Permit #:
BLDHVA-2025-04887
Status:
applied
Fee:
$548
Permit Type:
Replacement
Building Type:
Commercial
New heating and ventilating work in association with the addition of 6 new offices in existing commercial building. adding a vav box hot water reheat coil and relocating existing diffusers with new duct work
Valuation:
$36,746
Permit #:
202502108
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New heating and ventilating work in association with the addition of 6 new offices in existing commercial building. adding a vav box hot water reheat coil and relocating existing diffusers with new duct work
Valuation:
$36,746
Permit #:
202502108
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Providing and installing all necessary equipment materials and labor for a new hvac system as part of a renovation to the existing building as well as completing system controls insulation and testing and balancing
Valuation:
$17,161
Permit #:
BLDHVA-2025-04890
Status:
applied
Fee:
$423
Permit Type:
Replacement
Building Type:
Commercial
The existing sprinkler fire protection will be reworked to provide code coverage around new walls and ceilings as shown on bid documents dated 06/09/2025. sprinklers will be piped from existing outlets using equipment of equal size and functionality tha
Valuation:
N/A
Permit #:
PBFS-25-00562
Status:
complete
Fee:
$137
Permit Type:
Commercial
Building Type:
Business
Interior commercial plumbing associated with the remodel of existing unit bathrooms and miscellaneous other areas in building
Valuation:
$219,000
Permit #:
202506895
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Mfcb - multi-family buildings (3+ dwelling units) or commercial buildings new construction additions
2024-06-24
85 000 sf new building that includes and office space maintenance area and parking garage
Valuation:
$20,087,519
Permit #:
MFCB-24-54
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remodel op's coffee market and retail located in the wild west lobby of the wilderness resort. updating and rearranging sales counter finishes and added open office space adjacent to op's
Valuation:
$215,000
Permit #:
BC23-000002
Status:
issued
Fee:
N/A
Permit Type:
Construction - re...
Building Type:
N/A
Heating and ventilating work in association with the remodeling project for the interventional radiology area and ep lab
Valuation:
$620,000
Permit #:
202406347
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Ahc rivercenter urgent care
Valuation:
$645,000
Permit #:
HVAC-GEN-25-01462
Status:
withdrawn
Fee:
$492
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$3,000,000
Permit #:
BLR-25-00102
Status:
complete
Fee:
$383
Permit Type:
N/A
Building Type:
Offices
No Description Available
Valuation:
$3,000,000
Permit #:
BLR-25-00101
Status:
complete
Fee:
$383
Permit Type:
N/A
Building Type:
Offices
No Description Available
Valuation:
$3,000,000
Permit #:
BLR-25-00100
Status:
complete
Fee:
$383
Permit Type:
N/A
Building Type:
Offices
Avi systems inc - expanding existing office and warehouse space within building: tie into existing 4 pvc underground and addition 2- wc 2- lav 1- break sink (no ovens in break area) 1- coffee maker 1- fridge water line 1- under counter ice maker. pipe new water lines off existing with new hwr to above fixtures. addition new bottle filler in existing office area
Valuation:
N/A
Permit #:
BLDPLM-2024-05791
Status:
complete
Fee:
$72
Permit Type:
Repair/alteration
Building Type:
Commercial
Installing one fire damper off a vav and reworking some building controls for converting the existing storage/clean supply room and reading room on the second floor into a cath lab storage and ir storage room. these plans were reviewed by dhs
Valuation:
$12,500
Permit #:
202401384
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Withdrawn - *dupl* plumbing - jf ahern ref plumbing-25-01949*plan review
Valuation:
$262,000
Permit #:
PLB-25-02554
Status:
withdrawn
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Interior plumbing associated with construction of new building addition and per approved plans
Valuation:
$390,000
Permit #:
202302435
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
% pr - river bank plaza - apartment conversion - (iapmo - wdc piping system) - interior plumbing
Valuation:
$1,300,000
Permit #:
PLB-22-03103
Status:
complete
Fee:
$19,555
Permit Type:
N/A
Building Type:
N/A
Accuray - alteration for new tenant
Valuation:
$289,870
Permit #:
BLDNCH-2025-10962
Status:
issued
Fee:
$6,518
Permit Type:
Alteration
Building Type:
N/A
St rafael the archangel school - hvac
Valuation:
$1,140,000
Permit #:
HVAC-GEN-25-00849
Status:
filed
Fee:
$5,370
Permit Type:
N/A
Building Type:
N/A
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Ahern Jf Co Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Ahern Jf Co License info
Verified License
| License # | 748 - HVACCONT |
| Status | Active |
| City | Wisconsin Rapids |
| Type | Hvac Contractor, Regular, False |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Ahern Jf Co at the City of Wisconsin Rapids.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 6210 - HVACCONT |
| Status | Active |
| City | Wisconsin Rapids |
| Type | Hvac Contractor, Regular, False |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Ahern Jf Co at the City of Wisconsin Rapids.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 670984 - PM |
| Status | Active |
| City | Wisconsin Rapids |
| Type | Plumber |
- BuildZoom verified this license was active as of August 2025.
Verify this license's status for Ahern Jf Co at the City of Wisconsin Rapids.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 973699 |
| Status | Active |
| City | Stevens Point |
| Type | Building Contractor |
- When BuildZoom last verified this license, it had an expiration date of March, 2025. Check the current license status of Ahern Jf Co with the City of Stevens Point
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 9288756210 |
| Status | Active |
| City | Stevens Point |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Ahern Jf Co at the City of Stevens Point.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 230904 |
| Status | Active |
| City | Stevens Point |
| Type | Plumbing Contractor |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Ahern Jf Co at the City of Stevens Point.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 973699 |
| Status | Active |
| City | Stevens Point |
| Type | Building Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Ahern Jf Co with the City of Stevens Point
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 9288756210 |
| Status | Active |
| City | Stevens Point |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Ahern Jf Co with the City of Stevens Point
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 230904 |
| Status | Active |
| City | Stevens Point |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Ahern Jf Co with the City of Stevens Point
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 1235648 |
| Status | Active |
| City | Milwaukee |
| Type | Plumbing |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 220193 |
| Status | Active |
| City | Milwaukee |
| Type | Plumbing |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 865833 |
| Status | Active |
| City | Milwaukee |
| Type | Automatic Fire Sprinkler Contractor |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 43629 |
| Status | Active |
| City | Milwaukee |
| Type | Design Professional |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 1951-7 |
| Status | Active |
| City | Milwaukee |
| Type | Design Professional |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 670984 |
| Status | Active |
| City | Milwaukee |
| Type | Plumbing |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | PLMB1278789 |
| Status | Active |
| City | Wisconsin Rapids |
| Type | Plumbing |
- When BuildZoom last verified this license, it had an expiration date of March, 2023. Check the current license status of Ahern Jf Co with the City of Wisconsin Rapids
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | AUFS5984081 |
| Status | Active |
| City | Wisconsin Rapids |
| Type | Automatic Fire Sprinkler |
- When BuildZoom last verified this license, it had an expiration date of November, 2017. Check the current license status of Ahern Jf Co with the City of Wisconsin Rapids
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 583-11 |
| Status | Active |
| State | Wisconsin |
| Type | Architectural Or Engineering Corp - Certificate Of Authorization |
- When BuildZoom last verified this license, it had an expiration date of August, 2017. Check the current license status of Ahern Jf Co with 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 # | 1228638 |
| Status | Inactive |
| City | Milwaukee |
| Type | Plumbing |
- 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 40112-6 |
| Status | Inactive |
| City | Milwaukee |
| Type | Design Professional |
- 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LF 1581 |
| Status | Inactive |
| City | Milwaukee |
| Type | Fire Alarm 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | D-1340 |
| Status | Inactive |
| City | Milwaukee |
| Type | Design Professional |
- 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 16-PEOP-00093 |
| 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 16-PEOP-00038 |
| Status | Inactive |
| City | Milwaukee |
| Type | Plumbing |
- 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 223628 |
| Status | Inactive |
| City | Milwaukee |
| Type | Plumbing |
- 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 2118 |
| Status | Inactive |
| City | Milwaukee |
| Type | Design Professional |
- 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 230904 |
| Status | Inactive |
| City | Milwaukee |
| Type | Plumbing |
- 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 6210 |
| 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 17-PEOP-00075 |
| Status | Inactive |
| City | Milwaukee |
| Type | Automatic Fire Sprinkler 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 Ahern Jf Co at the City of Milwaukee License Search.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 8112689 |
| Status | Inactive |
| State | Michigan |
| Type | Plumbing |
- 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 Ahern Jf Co at the Michigan Department of Licensing & Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
112
BuildZoom Score
Insured
| Insurer | Zurich American |
Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $50,000 |
1.2K
Permits
- Building permit records show that Ahern Jf Co has worked on 1156 permitted projects.
Ahern Jf Co Employees
AK
Adam J Koenigs
AF
Alan R. Fox
Owner
AM
Anthony S Moyer
BD
Brian Diederichs
BS
Brian Stanke
CL
Chris Ladden
DS
David M Szymanski
HM
Hersey Mark
JB
Jason J Brenner
JA
John Ahern
JK
John Klinzing
Owner
JP
John Prusinski
JZ
John Zimmerman
JH
Joseph G Hofman
LK
Luke Keck
MH
Mark Hersey
MH
Mark R Hersey
PB
Paul A Behringer
TJ
Terrence J Julka
TW
Thomas E Wickersham
ZR
Zachary Rockendorf
ZR
Zachary Tyler Rockendorf