Updated: Nov 16, 2025
Location and Projects
Headquarters Address
855 Morris Street, Fond Du Lac, WI, 54935
Local address
13705 26TH AVE SUITE 110, Plymouth, MN, 55441
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Jf Ahern Plumber
Jf Ahern Co, 13705-26 Th Ave, PLYMOUTH, MN (Owned by: J. F. Ahern Co. Dba Ahern Fire Protection) holds a High Pressure Piping license and 8 other licenses according to the Minnesota license board.
Their BuildZoom score of 110 ranks in the top 4% of 77,973 Minnesota licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Jf Ahern Co, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Jf Ahern Co Services
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Jf Ahern Co Contact Information
Phone Number: (920) 921-9020
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Headquarters Address: 855 Morris Street, Fond Du Lac, WI, 54935
Local Address: 13705 26TH AVE SUITE 110, PLYMOUTH, MN 55441
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Jf Ahern Co PLYMOUTH
Quality
110
96th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Jf Ahern Co has a BuildZoom score of 110, which places them above 96% of 77,973 contractors in Minnesota.
Activity
|
65 projects
|
2025 |
|
94 projects
|
2024 |
|
75 projects
|
2023 |
|
91 projects
|
2022 |
Our building permit records indicate that Jf Ahern Co has worked on at least
325.0 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
|
50 projects
|
Home Additions |
|
17 projects
|
Commercial Renovations |
|
11 projects
|
New Constructions |
|
225 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Jf Ahern Co mostly works on
plumbing project
and home addition
projects.
Pricing
|
149 projects
|
< $5k |
|
37 projects
|
$5k-$20k |
|
20 projects
|
$20k-$50k |
|
14 projects
|
$50k-$100k |
|
17 projects
|
$100k-$250k |
|
19 projects
|
$250k-$500k |
|
5 projects
|
$500k-$1mil |
|
1 project
|
$1mil+ |
The typical size of their permits is approximately $3,780. 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.
Hydronic piping from (2) steam to hot water heat exchangers to each lobby level ftr and unit heaters and snow melt system. work also includes low pressure steam and condensate piping in the baldwin building basement from mechanical room to new ramp mechanical room heat exchangers
Valuation:
$528,920
Permit #:
R25-1667CM
Status:
issued
Fee:
$5,579
Permit Type:
N/A
Building Type:
N/A
Installation of new steam to hot water heat exchanger including piping connections to 26 vav's 2 unit heaters and 1 new hot water ahu coil. includes connections for replacement of 1 new chilled water coil at ahu. low pressure steam piping to new heat exchanger and replacement of 1 1/2 low pressure condensate main
Valuation:
$172,650
Permit #:
MC-P2505-0006
Status:
issued
Fee:
$1,766
Permit Type:
State licensed fa...
Building Type:
N/A
Plumbing for 7 story parking ramp. this work includes installation of a flammable waste interceptor floor drains area drains and roof drains. this also includes associated domestic water service and ramp washdown piping
Valuation:
$513,200
Permit #:
R25-1666CP
Status:
issued
Fee:
$5,422
Permit Type:
N/A
Building Type:
N/A
Mechanical hvac work for remodeling of the cardiac rehab department (mayo dan abraham building - 5th & 6th floors -mayo project roda23c0020)
Valuation:
$325,130
Permit #:
R25-0348CM
Status:
issued
Fee:
$3,448
Permit Type:
N/A
Building Type:
N/A
Mechanical hvac work for the fit-up of rst consolidate reading rooms to go-1 (mayo gonda building - 1st floor - mayo project rogo23c0060)
Valuation:
$301,600
Permit #:
R25-0298CM
Status:
issued
Fee:
$3,196
Permit Type:
N/A
Building Type:
N/A
Hydronic piping to (2) new fan coils in the gonda entry along with new radiant hydronic snowmelt on the east side of the gonda and mayo buildings
Valuation:
$498,700
Permit #:
R25-1079CM
Status:
issued
Fee:
$5,264
Permit Type:
N/A
Building Type:
N/A
Renovation of existing 2 400 sf physical therapy clinic space into an office suite including updates to the bathrooms adding a break room with kitchenette (no oven) offices and a conference room. reusing existing roof top units for conditioning replacing remodeled toilet room exhaust fan
Valuation:
$43,200
Permit #:
R25-1277CM
Status:
issued
Fee:
$487
Permit Type:
N/A
Building Type:
N/A
Plumbing for 2500 stall 778 019 square foot parking ramp. the works includes all drainage piping and water piping
Valuation:
$863,834
Permit #:
R25-1327CP
Status:
issued
Fee:
$9,097
Permit Type:
N/A
Building Type:
N/A
Replacing 2 crac units in a computer room out from hydronic to refrigerant
Valuation:
$265,000
Permit #:
R25-0537CM
Status:
issued
Fee:
$2,808
Permit Type:
N/A
Building Type:
N/A
-demo the existing copper piping from the mri room 01-231a for new shielding and mr installation and install new copper piping with new upright sprinkler heads above the finished ceiling and new mri safe pendent sprinkler heads in the ceiling. new copper piping will match the existing pipe schedule -in the adjacent rooms outside of the mri space that are being remodeled demolish the (... see more
Valuation:
$11,000
Permit #:
SP-P2508-0008
Status:
issued
Fee:
$238
Permit Type:
State licensed fa...
Building Type:
N/A
: update (4) existing wet systems on level 1 to accommodate new tenant building out. see plans for details
Valuation:
$348,203
Permit #:
2502-00103-FI
Status:
final
Fee:
$3,657
Permit Type:
N/A
Building Type:
Building use group
Demolition and installation of (2) fan coils in the gonda front entry with associated duct grilles registers and diffusers. demolition and installation of duct grilles registers and diffusers in the mayo entrance
Valuation:
$71,275
Permit #:
R25-1078CM
Status:
issued
Fee:
$781
Permit Type:
N/A
Building Type:
N/A
Void: project covered under o25-0009cb. plumbing for an 84 000 square foot warehouse
Valuation:
$302,065
Permit #:
O25-0027CB
Status:
canceled
Fee:
N/A
Permit Type:
N/A
Building Type:
320 - industrial/...
Mechanical hvac work for the remodel of the mayo store in the kahler subway. work mainly consists of replacing the old grd's with new. (mayo store-kahler subway mayo project roxx24c0020
Valuation:
$13,800
Permit #:
R25-0086CM
Status:
complete
Fee:
$172
Permit Type:
N/A
Building Type:
N/A
Change out of a air cooled chiller
Valuation:
$290,000
Permit #:
R25-0538CM
Status:
issued
Fee:
$3,070
Permit Type:
N/A
Building Type:
N/A
Mechanical hvac work for scanner 81 (mayo charlton building - 2nd floor - mayo project roch24c0030 (e24-3003 mr-mcr-ch2-1-mr)
Valuation:
$55,100
Permit #:
R25-0483CM
Status:
complete
Fee:
$613
Permit Type:
N/A
Building Type:
N/A
Underground only work for 16 yard hydrants from building potable water. work includes 8 yard hydrants on the north side of the new building and 8 yard hydrants on the west side of the building
Valuation:
$19,200
Permit #:
R25-1377CP
Status:
issued
Fee:
$235
Permit Type:
N/A
Building Type:
N/A
Ruam mit thai ahern will provide the labor and materials needed to install a 6-gallon ansul r-102 fire suppression system at ruam mit thai in st. paul mn. ***please note this proposal does not include the cost of an electrician needed to connect the ahern supplied micro switches to equipment shutdowns or building fire alarm this work is to be completed by others. this proposal also do... see more
Valuation:
N/A
Permit #:
20 24 023407 SES 00 EG
Status:
final
Fee:
N/A
Permit Type:
Special extinguis...
Building Type:
N/A
United therapeutics: fire sprinkler system
Valuation:
$296,491
Permit #:
O25-0029CB
Status:
issued
Fee:
$3,105
Permit Type:
N/A
Building Type:
437 - alterations
Domestic water and sanitary piping for building renovation. this includes numerous fixture replacements
Valuation:
$73,000
Permit #:
R25-0028CP
Status:
complete
Fee:
$792
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Jf Ahern Co License info
Verified License
| License # | HC774843 |
| Status | Active |
| State | Minnesota |
| Type | High Pressure Piping |
| Business Type | Not Available |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Jf Ahern Co at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | IR651097 |
| Status | Active |
| State | Minnesota |
| Type | Contractor Registration |
| Business Type | Not Available |
- BuildZoom verified this license was active as of September 2025.
Verify this license's status for Jf Ahern Co at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | PC774843 |
| Status | Active |
| State | Minnesota |
| Type | Plumbing |
| Business Type | Not Available |
- BuildZoom verified this license was active as of September 2025.
Verify this license's status for Jf Ahern Co at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | TS751385 |
| Status | Active |
| State | Minnesota |
| Type | Electrical |
| Business Type | Not Available |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Jf Ahern Co at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | MB647572 |
| Status | Active |
| State | Minnesota |
| Type | Mechanical Contractor Bond |
| Business Type | Not Available |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Jf Ahern Co at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | BV003345 |
| Status | Active |
| City | Burnsville |
| Type | Contractor, Fire Protection |
| Business Type | Not Available |
- BuildZoom has not verified this license since July, 2015.
Verify this license's status for Jf Ahern Co at the The City of Burnsville, MN.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PC645539 |
| Status | Inactive |
| State | Minnesota |
| Type | Plumbing |
| Business Type | Not Available |
- According to the Minnesota Department of Labor & Industry, 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 Jf Ahern Co at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HC000109 |
| Status | Inactive |
| State | Minnesota |
| Type | High Pressure Piping |
| Business Type | Not Available |
- According to the Minnesota Department of Labor & Industry, 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 Jf Ahern Co at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PM67719 |
| Status | Inactive |
| State | Minnesota |
| Type | Master Plumber |
| Business Type | Not Available |
- According to the Minnesota Department of Labor & Industry, 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 Jf Ahern Co at the Minnesota Department of Labor & Industry.
This is a sample of licensing data; click here to access a complete history.
110
BuildZoom Score
1.8K
Permits
- Building permit records show that Jf Ahern Co has worked on 1836 permitted projects.
Jf Ahern Co Employees
JP
J. F. Ahern Co. Dba Ahern Fire Protection
Owner
SP
Steven J. Powell