Updated: May 18, 2026
Location and Projects
Address
6925 H OAKLAND MILLS ROAD #530, Columbia, MD, 21045
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John Johnston Construction
John Johnston, 6925 H Oakland Mills Rd, Columbia, MD (Employee: John W Johnston) holds a Home Improvement license and 1 other license according to the Maryland license board.
Their BuildZoom score of 94 ranks in the top 24% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring John Johnston, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
John Johnston Services
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John Johnston Contact Information
Address: 6925 H OAKLAND MILLS ROAD #530, Columbia, MD 21045
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Tenant fit out for dollar tree store. remove and replace fixtures rough-ins existing
Valuation:
N/A
Permit #:
494414
Status:
complete
Fee:
$179
Permit Type:
Plumbperm
Building Type:
N/A
Kitchen remodel no gas work to include relocate 1 sink and faucet 1 disposal 1 dishwasher 1 water line to refrigerator. also cap existing vents in kitchen. fred co license #pm00654 building permit #477579
Valuation:
N/A
Permit #:
482334
Status:
complete
Fee:
$114
Permit Type:
Plumbperm
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
John Johnston License info
Verified License
| License # | 118806 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for John Johnston 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
| License # | 420317000338 |
| Status | Active |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
- When BuildZoom last verified this license, it had an expiration date of May, 2021. Check the current license status of John Johnston with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
John Johnston Employees
JJ
John Johnston
JJ
John W Johnston