Updated: Jun 06, 2026
Location and Projects
Address
6824 Fort Smallwood Rd, Baltimore, MD, 21226
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Mahon Plumbing
Mahon Plumbing, 6824 Fort Smallwood Rd, Baltimore, MD (Owned by: Gregory Paul Mahon) holds a Plumber license and 4 other licenses according to the Delaware license board.
Their BuildZoom score of 109 ranks in the top 5% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Mahon Plumbing, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Mahon Plumbing Services
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Mahon Plumbing Contact Information
Phone Number: (410) 766-8566
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Address: 6824 Fort Smallwood Rd, Baltimore, MD 21226
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Mahon Plumbing Baltimore
Quality
109
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Mahon Plumbing has a BuildZoom score of 109, which places them above 95% of 58,058 contractors in Maryland.
Activity
|
3 projects
|
2026 |
|
257 projects
|
2025 |
|
216 projects
|
2024 |
|
207 projects
|
2023 |
Our building permit records indicate that Mahon Plumbing has worked on at least
683.0 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
|
226 projects
|
New Constructions |
|
11 projects
|
Home Additions |
|
8 projects
|
Commercial Renovations |
|
636 projects
|
Plumbing projects |
|
247 projects
|
Sewer laterals |
Analyzing permits over the last 4 years shows that Mahon Plumbing mostly works on
plumbing project
and sewer lateral
projects.
Pricing
|
2 projects
|
< $5k |
|
1 project
|
$5k-$20k |
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.
Building permit comm-240280 plumbing interior alterations to existing space/building for new ati physical therapy office. install 17 plumbing fixtures for new tenant fit out
Valuation:
N/A
Permit #:
PLBG-250305
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Plumbing for new tenant building out for oak african market at outing plaza shopping center 2322 mountain road pasadena md 21122 to include: one 500 gallon grease interceptor one floor sink one three compartment sink one laundry sink one hand sink
Valuation:
N/A
Permit #:
P02315645
Status:
complete
Fee:
$340
Permit Type:
N/A
Building Type:
N/A
Installing plumbing for new single family dwelling *"other fixture is a pot-filler *basement bathroom is ground works only (rough in)
Valuation:
N/A
Permit #:
P02323217
Status:
canceled
Fee:
$216
Permit Type:
N/A
Building Type:
Single family dwe...
Gas lines for one gas water heater one gas range and one gas furnace and new water line for new gas water heater bge w.o. #19769011
Valuation:
N/A
Permit #:
P25000722
Status:
complete
Fee:
$116
Permit Type:
N/A
Building Type:
N/A
Water connection for irrigation system; no cc's due
Valuation:
N/A
Permit #:
W2409905336
Status:
filed
Fee:
$473
Permit Type:
N/A
Building Type:
N/A
Renovation for single family dwelling to include new plumbing for laundry room kitchen and 2nd floor master bathroom. with groundwork for new kitchen sink location
Valuation:
N/A
Permit #:
P02324412
Status:
filed
Fee:
$150
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with finished basement bathroom - rebuild tie into existing sewer and water
Valuation:
N/A
Permit #:
P02323118
Status:
filed
Fee:
$216
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with finished basement bathroom - reconnect to public sewer
Valuation:
N/A
Permit #:
P02322079
Status:
filed
Fee:
$216
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with finished basement; rough in basement kitchenette
Valuation:
N/A
Permit #:
P02315505
Status:
complete
Fee:
$125
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with future groundwork;reconnecting to county water meter
Valuation:
N/A
Permit #:
P02323212
Status:
complete
Fee:
$224
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with finished basement bathroom and basement wet bar
Valuation:
N/A
Permit #:
P02323122
Status:
complete
Fee:
$216
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with future groundwork and tie into existing sewer
Valuation:
N/A
Permit #:
P02323075
Status:
complete
Fee:
$216
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with future groundwork - note; property address is 414 asbury drive severna park md 21146 tax id 3000-2621-6600 building permit b02425345
Valuation:
N/A
Permit #:
P02318634
Status:
complete
Fee:
$125
Permit Type:
N/A
Building Type:
Single family dwe...
Water tap only
Valuation:
N/A
Permit #:
TAP2300000066
Status:
complete
Fee:
$290
Permit Type:
N/A
Building Type:
N/A
Plumbing for new single family dwelling with finished basement bathroom and wet bar
Valuation:
N/A
Permit #:
P02323150
Status:
complete
Fee:
$216
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with finished basement bathroom and kitchenette
Valuation:
N/A
Permit #:
P02321599
Status:
complete
Fee:
$216
Permit Type:
N/A
Building Type:
Single family dwe...
Plumbing for new single family dwelling with finished basement bathroom - note address is 1009a moss haven court annapolis md 21401
Valuation:
N/A
Permit #:
PLUMR-2025-00223
Status:
final
Fee:
$420
Permit Type:
N/A
Building Type:
N/A
Plumbing for new single family dwelling - rebuild and tie into existing sewer line
Valuation:
N/A
Permit #:
P02322941
Status:
filed
Fee:
$216
Permit Type:
N/A
Building Type:
Single family dwe...
One 1 000 gallon grease interceptor for new tenant building out - always ice cream
Valuation:
N/A
Permit #:
P02321825
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Supply and install one backflow for watershed community irrigation system location 3087 current way laurel md 20724 active rec area open space amenity area
Valuation:
N/A
Permit #:
P02310606
Status:
filed
Fee:
$55
Permit Type:
N/A
Building Type:
Townhome
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120
BZ Score
-
Avg Project
-
Projects
120
BZ Score
$1.5K
Avg Project
-
Projects
120
BZ Score
$1.5K
Avg Project
-
Projects
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Verified License
BuildZoom confirmed this contractor's license
Mahon Plumbing License info
Verified License
| License # | PL-0002801 |
| Status | Active |
| State | Delaware |
| Type | Plumber |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Mahon Plumbing at the State of Delaware.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 11839 |
| Status | Active |
| State | Maryland |
| Type | Plumbers |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Mahon Plumbing at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 2014601259 |
| Status | Active |
| State | New Castle County |
| Type | Non Resident Contractor |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Mahon Plumbing at the State of Delaware Department of Finance: Division of Revenue.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Annapolis |
| Type | Plumbing Cont |
- According to the The City of Annapolis, MD, 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 Mahon Plumbing at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | A202144 |
| Status | Inactive |
| State | Maryland |
| Type | Plumbing Contractors |
- According to the Maryland Department of Labor, Licensing & Regulation, 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 Mahon Plumbing at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
109
BuildZoom Score
Insured
| Insurer | Ohio |
4.7K
Permits
- Building permit records show that Mahon Plumbing has worked on 4688 permitted projects.
Mahon Plumbing Employees
GM
Gregory P. Mahon
Applicant
GM
Gregory Paul Mahon
Owner