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, 100% are HVAC work.
HVAC · 3
Licensed as
Maryland HVACR Contractor, Master Plumber and Gas Fitter
Observed working in
Columbia
Observed filing in
2 counties
License numbers
D1006055, 20020077263
Each county's permit system holds only their own records, so the
combined view above exists nowhere else.
Recent work
-
HVAC install
August 2026 · Anne Arundel County
Install type II hood
-
Interior replacement
April 2026 · Anne Arundel County
Replace existing duct work, add 2 bath fans and add return.
-
Gas water heater replacement
March 2026 · Howard County
Replacement of a Gas water heater
Licensing
-
Maryland HVACR Contractor
Issued by Maryland Board of Heating, Ventilation, Air Conditioning and Refrigeration.
Verify
-
Master Plumber and Gas Fitter
Issued by Maryland Board of Plumbing.
Verify
Towns we observed them working in
Columbia
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.
What this page is, and is not
- Anne Arundel County: 2 permits observed, from records beginning December 2025.
- Howard 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 A-ADVANCED LLC. DBA JOHN G. WEBSTER under
Maryland HVACR Contractor, 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 HVAC contractors in Anne Arundel County