Updated: Feb 18, 2026
Location and Projects
Address
1 N HAVEN ST, Baltimore, MD, 21224
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Greg Concannon HVAC/Mechanical Contractor
Greg Concannon, 1 N Haven St, Baltimore, MD holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 2 other licenses according to the Maryland license board.
Their BuildZoom score of 91 ranks in the top 37% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Greg Concannon, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Greg Concannon Contact Information
Phone Number: (410) 563-7549
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Address: 1 N HAVEN ST, Baltimore, MD 21224
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Greg Concannon Baltimore
Quality
91
63rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Greg Concannon has a BuildZoom score of 91, which places them above 63% of 58,058 contractors in Maryland.
Activity
|
2 projects
|
2025 |
Our building permit records indicate that Greg Concannon has worked on at least
2.0 projects over the past year.
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.
Pricing
|
1 project
|
$20k-$50k |
|
1 project
|
$50k-$100k |
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.
Ductwork air devices 1 exhaust fan removal of existing unit install only remote terminal unit and vav bathroom and body works
Valuation:
N/A
Permit #:
2018-05056
Status:
complete
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
6 fans 3 electric heaters ductwork air devices, (install) 17 remote terminal unit valley mall hagerstown space 750
Valuation:
N/A
Permit #:
2018-03936
Status:
complete
Fee:
$1,500
Permit Type:
N/A
Building Type:
N/A
Plumbing permit
Renovate existing freezer repository to accommodate additional ln2 and mechanical freezers.work will include mechanical & electrical upgrades & installation of unitrust framing system to match existing. plumbing permit is for gas work only. no plumbing fixtures
Valuation:
$125,000
Permit #:
100127
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Construction of new auto sales and service dealership with detached carwash facility
Valuation:
$7,725,434
Permit #:
BCN-5891-2014
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install remote terminal unit curbs themostats smoke detectors air devices duct work & exhaust fans for an 11, 542 sq ft interior renovations for autozone to include replacing existing roof top units and upgrading electrical plumbing and mechanical sprinkler system is also existing previously occupied by bingo island. north village shopping center
Valuation:
N/A
Permit #:
2004-10109
Status:
complete
Fee:
$100
Permit Type:
N/A
Building Type:
N/A
Install one 7.5 ton gas fired remote terminal unit one thermostat one exhaust fan all duct work ten air devises (grills registers & diffusers) for a 2, 571 sq ft interior fit out to be bcbg, a clothing store. with interior partioning for fitting rooms stock room and installing mirrors and new counters and a new bathroom and case work. electrical and mechanical permits are required. t... see more
Valuation:
N/A
Permit #:
2006-07867
Status:
complete
Fee:
$220
Permit Type:
N/A
Building Type:
N/A
Install duct work exhaust fans air devices thermosats two exhaust hoods mva one exhaust fan (captive air package install only) for interior fit-out of tenant space #595 for desert moon fresh mexican grille previously occupied by pocket change (video arcade)
Valuation:
N/A
Permit #:
2006-09799
Status:
complete
Fee:
$220
Permit Type:
N/A
Building Type:
N/A
Rtu-1 10 tons 4000 cfm 3hp air divices curb adapt. remote terminal unit 2-10 tons 4000 cfm 3 hp ductwork. euh-275 lbs 480 vhs/3ph controls (stand alone stat) ouch-30 lb 480 vlts 3 ph cfw/roof cap
Valuation:
N/A
Permit #:
2005-04619
Status:
complete
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Mechanical to install duct work and air devices for an interior fit out of 3935 sq ft of existing commercial building. prime outlets of hagerstown
Valuation:
N/A
Permit #:
2005-03223
Status:
complete
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Install three rtu's - two 12 ton and one 5 ton duct work one toilet exhaust air devices controls and structural steel for tenant fitout
Valuation:
N/A
Permit #:
2008-01471
Status:
complete
Fee:
$380
Permit Type:
N/A
Building Type:
N/A
Mechanical work for interior fit-out for icings
Valuation:
N/A
Permit #:
2005-07563
Status:
complete
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Tenant interior fit-out for commercial retail. duct work modifications to meet new tenant layout. re-use of existing system
Valuation:
$24,963
Permit #:
M02231216
Status:
filed
Fee:
$284
Permit Type:
N/A
Building Type:
N/A
Interior fit-out of existing space. work to include maintenance to two (2) existing rtus install of new duct work to meet proposed layout kitchen equipment installation and (1) new remote terminal unit
Valuation:
$83,000
Permit #:
M02231193
Status:
filed
Fee:
$748
Permit Type:
N/A
Building Type:
N/A
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Greg Concannon Reviews
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Verified License
BuildZoom confirmed this contractor's license
Greg Concannon License info
Verified License
| License # | 7163 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Greg Concannon at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| City | Annapolis |
| Type | Mech Cont, Master |
- When BuildZoom last verified this license, it had an expiration date of March, 2012. Check the current license status of Greg Concannon with the The City of Annapolis, MD
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CON-168 |
| Status | Inactive |
| City | Annapolis |
| Type | Mech 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 Greg Concannon at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
91
BuildZoom Score
9
Permits
- Building permit records show that Greg Concannon has worked on 9 permitted projects.
Greg Concannon Employees
GC
Greg Concannon
Owner