Updated: May 05, 2026
Location and Projects
Headquarters Address
10798 SALT LICK ROAD, Tera Alta, WV, 26764
Local address
Millersville, MD, 21108
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John Marshall, Sr HVAC/Mechanical Contractor
John Marshall, Sr, Millersville, MD holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 2 other licenses according to the Maryland license board.
Their BuildZoom score of 93 ranks in the top 27% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring John Marshall, Sr, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
John Marshall, Sr Contact Information
Phone Number: (410) 766-4030
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Verizon wireless call center/interior alterations to computer lounge and office space see list 4107664030 b12002760
Valuation:
N/A
Permit #:
E12004257
Status:
complete
Fee:
$188
Permit Type:
N/A
Building Type:
N/A
Verizon see list 4107664030
Valuation:
N/A
Permit #:
E13002015
Status:
complete
Fee:
$958
Permit Type:
N/A
Building Type:
N/A
Building a conference room see list contact 4107664030 b09002861
Valuation:
N/A
Permit #:
E09004569
Status:
complete
Fee:
$270
Permit Type:
N/A
Building Type:
N/A
Install 2 circuits from the disconnects to two new elevators no equipment list contact 410-766-2100
Valuation:
N/A
Permit #:
E09000781
Status:
complete
Fee:
$160
Permit Type:
N/A
Building Type:
N/A
Replace with new fire alarm system
Valuation:
N/A
Permit #:
FIRE09-0114
Status:
final
Fee:
$1,938
Permit Type:
Existing commercial
Building Type:
N/A
No basement plumbing using gravity flow
Valuation:
N/A
Permit #:
P9201656
Status:
APPR
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
364 fire alarm devices 1 fluorescent fix
Valuation:
N/A
Permit #:
ELE09-0435
Status:
final
Fee:
$200
Permit Type:
Existing building...
Building Type:
N/A
Commercial electric addition alteration
2008-11-19
Building 8 room 24 basement see list
Valuation:
N/A
Permit #:
E08004438
Status:
complete
Fee:
$160
Permit Type:
N/A
Building Type:
N/A
Commercial electric addition alteration
2008-11-19
Building 6 rooms 25-43 basement see list
Valuation:
N/A
Permit #:
E08004437
Status:
complete
Fee:
$408
Permit Type:
N/A
Building Type:
N/A
All setbacks are way over 100
Valuation:
N/A
Permit #:
B8900488
Status:
APPR
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Commercial services
Valuation:
N/A
Permit #:
ELE08-0356
Status:
final
Fee:
$100
Permit Type:
Existing building...
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
FIRE08-0109
Status:
final
Fee:
$120
Permit Type:
Existing commercial
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
ELE08-0429
Status:
final
Fee:
$150
Permit Type:
Existing building...
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
John Marshall, Sr License info
Verified License
| License # | 10255 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for John Marshall, Sr at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 10255 |
| Status | Inactive |
| State | Maryland |
| Type | Electricians |
- According to the Maryland Department of Labor, Licensing & Regulation, 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 John Marshall, Sr at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | E2511 |
| Status | Inactive |
| City | Annapolis |
| Type | Electrical 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 John Marshall, Sr at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
Insured
| Insurer | Preferred Insurance |
9
Permits
- Building permit records show that John Marshall, Sr has worked on 9 permitted projects.
John Marshall, Sr Employees
JS
John Marshall, Sr
Owner