Updated: May 12, 2026
Location and Projects
Address
1300 Mercantile Lane, Upper Marlboro, MD, 20774
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the Rowan Group Construction
the Rowan Group LLC, 1300 Mercantile Ln, Upper Marlboro, MD (Owned by: Gregory Barnes) holds a Renovation license and 4 other licenses according to the Environmental Protection Agency 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 the Rowan Group LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
the Rowan Group LLC Services
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the Rowan Group LLC Contact Information
Phone Number: (301) 579-4556
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Address: 1300 Mercantile Lane, Upper Marlboro, MD 20774
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Addition fireplace in single family dwelling & chimney on top of existing deck ul# 127 & ulcs 610
Valuation:
$4,000
Permit #:
B02224816
Status:
complete
Fee:
$75
Permit Type:
N/A
Building Type:
N/A
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
the Rowan Group LLC License info
Verified License
| License # | NAT-113411-3 |
| Status | Active |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Llc |
- BuildZoom verified this license was active as of December 2025.
Verify this license's status for the Rowan Group LLC at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 410516000650 |
| Status | Active |
| City | District Of Columbia |
| Type | Gen Contr Construction Mngr |
| Business Type | Llc |
- When BuildZoom last verified this license, it had an expiration date of June, 2024. Check the current license status of the Rowan Group LLC with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 64002012 |
| Status | Active |
| City | District Of Columbia |
| Type | Home Improvement Salesman |
| Business Type | Llc |
- When BuildZoom last verified this license, it had an expiration date of August, 2024. Check the current license status of the Rowan Group LLC with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 2705127334 |
| Status | Active |
| State | Virginia |
| Type | Landscape Service (Lsc), Commercial Improvement (Cic), Landscape Irrigation (Isc), Home Improvement (Hic), Roofing (Roc) |
| Business Type | Llc |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for the Rowan Group LLC at the Virginia Department of Professional and Occupational Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 64001330 |
| Status | Active |
| City | District Of Columbia |
| Type | Home Improvement Contractor |
| Business Type | Llc |
- When BuildZoom last verified this license, it had an expiration date of July, 2016. Check the current license status of the Rowan Group LLC with the Department of Consumer and Regulatory Affairs
This is a sample of licensing data; click here to access a complete history.
91
BuildZoom Score
the Rowan Group LLC Employees
GB
Gregory Barnes
Owner