Updated: Feb 10, 2026
Location and Projects
Address
Utica, MI, 48316
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Mainline Plumbingand Sewer
Mainline Plumbingand Sewer, Shelby Twp, MI (Owned by: Mark Delfin) holds a Plumbing Contractor license and 5 other licenses according to the Michigan license board.
Their BuildZoom score of 102 ranks in the top 11% of 167,179 Michigan licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Mainline Plumbingand Sewer, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Mainline Plumbingand Sewer Services
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Mainline Plumbingand Sewer Contact Information
Phone Number: (586) 228-8009
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Building Permits by Mainline Plumbingand Sewer
This is a sample of this contractor's permits. Click here to access their complete permit history.
Mainline plumbing will replace an existing backflow device with a new device. this device is for an irrigation system
Valuation:
N/A
Permit #:
PP24-0394
Status:
suspended
Fee:
$136
Permit Type:
plumbing
Building Type:
N/A
Mainline plumbing will install a new water powered back up sump pump and a backflow device on back up pump
Valuation:
N/A
Permit #:
PP24-60345
Status:
final
Fee:
$90
Permit Type:
plumbing
Building Type:
N/A
Mainline plumbing installed new water lines for laundry box and vanity. mainline plumbing installed new underground vent toilet flange and drain lines for laundry tub
Valuation:
N/A
Permit #:
PP23-0013
Status:
issued
Fee:
$187
Permit Type:
New home
Building Type:
N/A
Mainline plumbing will install a new water powered back up sump pump and a backflow device on back up pump
Valuation:
N/A
Permit #:
PP24-60346
Status:
issued
Fee:
$90
Permit Type:
plumbing
Building Type:
N/A
Mainline plumbing will install a new water powered back up sump pump and a backflow device on back up pump
Valuation:
N/A
Permit #:
PP24-60344
Status:
issued
Fee:
$90
Permit Type:
plumbing
Building Type:
N/A
Mainline plumbing will install a new water powered back up sump pump and a backflow device on back up pump
Valuation:
N/A
Permit #:
PP24-60343
Status:
issued
Fee:
$90
Permit Type:
plumbing
Building Type:
N/A
Mainline plumbing will replace broken sump pump discharge line with new sch. 40 pvc line
Valuation:
N/A
Permit #:
PP24-0124
Status:
final
Fee:
$130
Permit Type:
plumbing
Building Type:
N/A
Mainline plumbing will install a new water power back up sump pump with backflow device
Valuation:
N/A
Permit #:
PP24-60342
Status:
final
Fee:
$105
Permit Type:
plumbing
Building Type:
N/A
Mainline plumbing will repair sump pump discharge line on the exterior of the home
Valuation:
N/A
Permit #:
PSS2024-0165
Status:
final
Fee:
$75
Permit Type:
Sewer installatio...
Building Type:
N/A
No building permit reqd moving water meter from outside to inside
Valuation:
N/A
Permit #:
PP23-0391
Status:
final
Fee:
$75
Permit Type:
plumbing
Building Type:
N/A
Mainline plumbing will install a water power back up sump pump
Valuation:
N/A
Permit #:
PP2023-1018
Status:
final
Fee:
$405
Permit Type:
plumbing
Building Type:
N/A
Replace water heater (1 insp)
Valuation:
N/A
Permit #:
PP23-0396
Status:
final
Fee:
$137
Permit Type:
Water heater
Building Type:
N/A
No building permit reqd mainline plumbing will install a 2nd meter at home
Valuation:
N/A
Permit #:
PP24-0260
Status:
final
Fee:
$77
Permit Type:
plumbing
Building Type:
N/A
Repair sewer line
Valuation:
N/A
Permit #:
PENG-2024-0076
Status:
final
Fee:
$100
Permit Type:
Eng
Building Type:
N/A
Mainline plumbing will install an 80 gallon gas water heater
Valuation:
N/A
Permit #:
PP2024-0008
Status:
final
Fee:
$95
Permit Type:
Add/alter/repair
Building Type:
N/A
Install secondary water meter (1 insp)
Valuation:
N/A
Permit #:
PP25-0711
Status:
final
Fee:
$152
Permit Type:
Secondary water m...
Building Type:
N/A
Replace 10 of sewer line in basement
Valuation:
N/A
Permit #:
PP21-1000
Status:
final
Fee:
$207
Permit Type:
Sewer
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
PP24-40088
Status:
final
Fee:
$81
Permit Type:
plumbing
Building Type:
N/A
Install 2 backflow devices and 2 drains for tenant build-out for mvp grooming 2 insp
Valuation:
N/A
Permit #:
PP22-0673
Status:
final
Fee:
$197
Permit Type:
Alteration
Building Type:
N/A
Gas burner 199 000 btu - water heater
Valuation:
N/A
Permit #:
PM2021-1470
Status:
final
Fee:
$40
Permit Type:
Mechanical
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Mainline Plumbingand Sewer License info
Verified License
| License # | 8002455 |
| Status | Active |
| State | Michigan |
| Type | Plumbing Contractor |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Mainline Plumbingand Sewer 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 # | 8113605 |
| Status | Active |
| State | Michigan |
| Type | Plumbing |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Mainline Plumbingand Sewer 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 # | 8113605 |
| Status | Active |
| State | Michigan |
| Type | Plumbing |
- When BuildZoom last verified this license, it had an expiration date of April, 2026. Check the current license status of Mainline Plumbingand Sewer 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 # | 8108097 |
| 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 Mainline Plumbingand Sewer 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 # | 8002455 |
| Status | Active |
| State | Michigan |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of April, 2025. Check the current license status of Mainline Plumbingand Sewer 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 # | 8108097 |
| 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 Mainline Plumbingand Sewer at the Michigan Department of Licensing & Regulatory Affairs.
This is a sample of licensing data; click here to access a complete history.
102
BuildZoom Score
316
Permits
- Building permit records show that Mainline Plumbingand Sewer has worked on 316 permitted projects.
Mainline Plumbingand Sewer Employees
JT
Jamie Thomson
Owner
JT
Jamie Robert Thomson
MD
Mark Delfin
Owner
MD
Mark J Delfin
RT
Richard Thomson
Owner
RT
Richard C Thomson