Updated: Jan 26, 2026
Location and Projects
Address
P O BOX 772, Slidell, LA, 70459
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GJM Plumbing Service, LLC Photos
GJM Plumbing Service, LLC
GJM Plumbing Service, LLC, Slidell, Po Box 772, Slidell, LA (Owned by: G "John" Montalbano, Jr.) holds a Plumbing license and 1 other license according to the Louisiana license board.
Their BuildZoom score of 96 ranks in the top 20% of 31,948 Louisiana licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring GJM Plumbing Service, LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
GJM Plumbing Service, LLC Services
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GJM Plumbing Service, LLC Contact Information
Phone Number: (504) 416-1087
Address: P O BOX 772, Slidell, LA 70459
Building Permits by GJM Plumbing Service, LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Residential gas permit (effective 8/11/2022), service fee (3%)
2023-03-24
Residential gas generator installation
Valuation:
N/A
Permit #:
2023-1244
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Accessory
Gas line for gilligilsok per kenny for them to file while waiting on site work permit to be issued
Valuation:
N/A
Permit #:
2022-1854
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Single family
Installed 2 water heaters
Valuation:
N/A
Permit #:
2021-60174
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Single family
Generator installation
Valuation:
N/A
Permit #:
2021-56055
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Single family
Tunnel job
Valuation:
$0
Permit #:
2015-26063
Status:
Completed
Fee:
$40
Permit Type:
N/A
Building Type:
plumbing
Installing grease trap
Valuation:
N/A
Permit #:
27815
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Commercial renova...
No Description Available
Valuation:
N/A
Permit #:
2013-4334
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Electrical
Plumbing permit - changing 24 ft sewer under building
Valuation:
N/A
Permit #:
2017-80819
Status:
issued
Fee:
N/A
Permit Type:
plumbing work only
Building Type:
Single family house
No Description Available
Valuation:
N/A
Permit #:
43785
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
PLB2010-1093
Status:
issued
Fee:
$30
Permit Type:
Restaurant
Building Type:
N/A
Gas meter increase
Valuation:
N/A
Permit #:
55612
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
General commercial
GJM Plumbing Service, LLC Reviews
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Verified License
BuildZoom confirmed this contractor's license
GJM Plumbing Service, LLC License info
Verified License
| License # | 70537 |
| Status | Active |
| State | Louisiana |
| Type | Plumbing |
| Class | Commercial License Certificate |
| Date Issued | 09-18-2025 |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for GJM Plumbing Service, LLC at the Louisiana Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 60696 |
| Status | Inactive |
| State | Louisiana |
| Type | Business And Law, Plumbing (Statewide) |
| Class | Commercial License |
- According to the Louisiana Licensing Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for GJM Plumbing Service, LLC at the Louisiana Licensing Board.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
11
Permits
- Building permit records show that GJM Plumbing Service, LLC has worked on 11 permitted projects.
GJM Plumbing Service, LLC Employees
G "John" Montalbano, Jr.
Owner