Permits are pulled before work begins and then
inspected by the county. A contractor who files them is working
inside a system with an inspector in it, which is what unpermitted
work avoids.
What the permits show
Of the permits we observed, 66% are plumbing work.
Plumbing
131
Gas
45
HVAC
15
Accessory Structure
4
Deck & Patio
1
Pool & Spa
1
Licensed as
Master Plumber and Gas Fitter
Observed working in
Hanover, Severna Park, Annapolis and 9 more
Observed filing in
3 counties
License numbers
A2002144, 20020011839, AB000058
Each county's permit system holds only their own records, so the
combined view above exists nowhere else.
Recent work
-
Permit filed
September 2026 · Anne Arundel County
Tap into public sewer
-
Water heater replacement
September 2026 · Anne Arundel County
Supply and install one 50-gallon electric water heater
-
New garage
September 2026 · Anne Arundel County
Install propane gas line in detached garage
-
Gas work
September 2026 · Anne Arundel County
Gas lines for SFD
-
Plumbing work
September 2026 · Anne Arundel County
Plumbing for SFD, tie into existing sewer
-
Permit filed
September 2026 · Anne Arundel County
Install water line only
-
Plumbing install
September 2026 · Howard County
Supply and install water powered sump pump in basement
-
Permit filed
August 2026 · Anne Arundel County
Water sewer connection cc's paid on BP
-
Permit filed
August 2026 · Anne Arundel County
Connect existing sewer service to new cleanout; no cc's due
-
Gas install
August 2026 · Anne Arundel County
Install propane gas to new SFD
Licensing
-
Master Plumber and Gas Fitter
Issued by Maryland Board of Plumbing.
Verify
Towns we observed them working in
HanoverSeverna ParkAnnapolisPasadenaArnoldGlen BurnieCrownsvilleEdgewaterMillersvilleSevernWest RiverDavidsonville
We hold permit records for Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Frederick County, Howard County, Prince George's County, and Washington DC.
Work anywhere else is not missing from this contractor's record, it
is outside what we cover.
Permits by year
2023
3
2024
5
2025
3
2026
226
Our records for this
contractor's counties begin August 2021. Years
before that are not shown because we hold nothing for them, not
because nothing happened.
What this page is, and is not
- Anne Arundel County: 216 permits observed, from records beginning December 2025.
- Howard County: 20 permits observed, from records beginning August 2021.
- Frederick County: 1 permits observed, from records beginning August 2021.
This page shows permits we observed in county records.
Our observation is not complete: work done before those dates, in
counties we do not cover, or on filings that name no contractor does
not appear here. A contractor's real work is almost always
greater than what we observed, and absence of a permit on this page
does not mean the work was not done or not permitted.
We currently hold records for
Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Frederick County, Howard County, Prince George's County, and Washington DC; see permit
coverage for what that includes.
Common questions
- Does a permit record mean this contractor is licensed?
- County permit records list MAHON PLUMBING INC under
Master Plumber and Gas Fitter.
Check current standing with the issuing body before hiring.
- Why do some contractors show more permits than others?
- Counties began publishing at different times and describe
contractors differently, so the number reflects what we observed
as much as what the contractor did. It is not a ranking.
- What should I still ask for?
- Proof of insurance, a written contract, and the license number
for the trade being performed. A permit record is a starting
point, not a substitute for either.
Other Plumbing contractors in Anne Arundel County