Updated: Jun 23, 2026
Location and Projects
Address
17204 CARTY LANE, Hagerstown, MD, 21740
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Gregory Wayne Keller HVAC/Mechanical Contractor
Gregory Wayne Keller, 17204 Carty Ln, Hagerstown, MD holds a Heating, Ventilation, Air Conditioning And Refrigeration license according to the Maryland license board.
Their BuildZoom score of 96 ranks in the top 20% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Gregory Wayne Keller, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Gregory Wayne Keller Contact Information
Address: 17204 CARTY LANE, Hagerstown, MD 21740
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Mechanical to install mini split system with (2) 12k btu heads for 986 sq. ft. one story pool house potomac estates section b lot 25
Valuation:
N/A
Permit #:
2022-01911
Status:
complete
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Complete installation of furnace with air conditioning unit and venting
Valuation:
N/A
Permit #:
M-20241522
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacing 3 heat pump and air conditioning systems with like systems in same location. vcs inc
Valuation:
N/A
Permit #:
2021-04451
Status:
complete
Fee:
$380
Permit Type:
N/A
Building Type:
N/A
Installing (2) 7 flex ducts off main system with return for each room in one story addition
Valuation:
N/A
Permit #:
2020-03883
Status:
complete
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Change oil furnace to gas & addition air conditioning
Valuation:
N/A
Permit #:
M-20213981
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Changing out existing system with same size same location of 2.5 ton heat pump antietam manor section 3 lot 8
Valuation:
N/A
Permit #:
2019-01705
Status:
complete
Fee:
$115
Permit Type:
N/A
Building Type:
N/A
Replace old furnace and install new heat pump
Valuation:
N/A
Permit #:
M-20210706
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing heat pump replace with new condenser & air handler old system btu's: in-36, 000 out-36, 000 new system btu's: in-36, 000 out-36, 000
Valuation:
N/A
Permit #:
2017-04665
Status:
complete
Fee:
$105
Permit Type:
N/A
Building Type:
N/A
Repair existing air conditioning chimney liner hood bathroom fan
Valuation:
N/A
Permit #:
M-20223464
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Relocate condenser
Valuation:
N/A
Permit #:
M-20212859
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installed minisplit ductless heatpumps
Valuation:
N/A
Permit #:
M-20203145
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace residential air conditioning
Valuation:
N/A
Permit #:
M-20222326
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace residential air conditioning
Valuation:
N/A
Permit #:
M-20222325
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installed new 2 1/2 ton heat pump & duct work
Valuation:
N/A
Permit #:
M-20192714
Status:
complete
Fee:
N/A
Permit Type:
Mechanical reside...
Building Type:
N/A
Heat pump. complete new system
Valuation:
N/A
Permit #:
M-20223248
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Venting for bathroom fan
Valuation:
N/A
Permit #:
M-20223543
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Complete installation
Valuation:
N/A
Permit #:
M-20223465
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Complete new system
Valuation:
N/A
Permit #:
M-20223095
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Complete new system
Valuation:
N/A
Permit #:
M-20222991
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Complete new system
Valuation:
N/A
Permit #:
M-20222984
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Gregory Wayne Keller License info
Verified License
| License # | 5312 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Gregory Wayne Keller at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
33
Permits
- Building permit records show that Gregory Wayne Keller has worked on 33 permitted projects.
Gregory Wayne Keller Employees
GK
Gregory Wayne Keller
Owner