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, 95% are HVAC work.
HVAC
1596
Accessory Structure
26
Electrical
26
Plumbing
20
Deck & Patio
7
Gas
1
Typical job observed: 3 ton systems, 80,000 BTU, 9 kW, 150 amp service.
Licensed as
Master Plumber and Gas Fitter, Maryland HVACR Contractor, Maryland State Electrician, Howard County Restricted Electrician, Natural Gas Fitter
Observed working in
Columbia, Ellicott City, Laurel and 9 more
Observed filing in
3 counties
License numbers
000664, D1002519, ES 11269, 20020107322, ER 01118, 05020016031, 20130065158, 05010008486
Each county's permit system holds only their own records, so the
combined view above exists nowhere else.
Recent work
-
Furnace replacement
September 2026 · Anne Arundel County
Replacement of 1 Carrier Infinity Gas Furnace and 3 ton Infinity Air Conditioner.
-
Furnace replacement
88,000 BTU
September 2026 · Anne Arundel County
REPLACEMENT OF LENNOX 96% NATURAL GAS FURNACE (88,000 BTUs).
-
Heat pump install
3 tons
September 2026 · Anne Arundel County
Furnish and install (1) lennox 3 ton heat pump system
-
Furnace replacement
3.5 tons
September 2026 · Anne Arundel County
REPLACEMENT OF LENNOX 96% NATURAL GAS FURNACE (88,000 BTUs) AND 3.5 TON AIR CONDITIONER SYSTEM (R-454B).
-
Heat pump install
September 2026 · Howard County
Install new Carrier heat pump system with air handler (27VNA024A003 / FE5BNXB24L00),including variable speed compressor…
-
Furnace replacement
4 tons
September 2026 · Howard County
REPLACEMENT OF CARRIER 97% NATURAL GAS FURNACE (80,000 BTUs) AND 4 TON AIR CONDITIONER SYSTEM (R-454B).
-
Heat pump install
2 tons
September 2026 · Anne Arundel County
Furnish and install (1) lennox 2 ton heat pump system in attic
-
Furnace replacement
80,000 BTU
September 2026 · Howard County
REPLACEMENT OF CARRIER 97% NATURAL GAS FURNACE (80,000 BTUs).
-
Heat pump install
5 tons
August 2026 · Howard County
Replacement of 5 ton heat pump and air handler system
-
Heat pump install
2.5 tons
August 2026 · Anne Arundel County
Replacement of lennox 2.5 ton heat pump and air handler (r-454b) with 600 aprilaire humidifier.
Licensing
-
Master Plumber and Gas Fitter
Issued by Maryland Board of Plumbing.
Verify
-
Maryland HVACR Contractor
Issued by Maryland Board of Heating, Ventilation, Air Conditioning and Refrigeration.
Verify
-
Maryland State Electrician
Issued by Maryland Board of Master Electricians.
Verify
-
Howard County Restricted Electrician
Issued by Howard County.
-
Natural Gas Fitter
Issued by Maryland Board of Plumbing.
Verify
Towns we observed them working in
ColumbiaEllicott CityLaurelClarksvilleFultonElkridgeWoodstockWoodbineDaytonMarriottsvilleSeverna ParkGlenwood
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
120
2024
527
2025
542
2026
487
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
- Howard County: 1586 permits observed, from records beginning August 2021.
- Anne Arundel County: 89 permits observed, from records beginning December 2025.
- 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 ENVIRONMENTAL SYSTEMS ASSOCIATES LLC DBA CROPPMETCALFE under
Master Plumber and Gas Fitter, Maryland HVACR Contractor, Maryland State Electrician, Howard County Restricted Electrician, Natural 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 Howard County