Updated: May 17, 2026
Location and Projects
Address
21 FONTANA LANE SUITE 104, Baltimore, MD, 21237
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Master Seal Construction
Master Seal, Inc, 21 Fontana Ln, Baltimore, MD (Owned by: John Paul Dennis) holds a Home Improvement license and 3 other licenses according to the Maryland license board.
Their BuildZoom score of 0 does not rank in the top 50% of Maryland contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Master Seal, Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Master Seal, Inc Services
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Master Seal, Inc Contact Information
Phone Number: (410) 377-2495
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Address: 21 FONTANA LANE SUITE 104, Baltimore, MD 21237
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Master Seal, Inc Reviews
5 out of 5 stars, based on
1
review
-
By Joyce M.January 25, 2021Install two doors, at my basement enter
This is a sample of this contractor's permits. Click here to access their complete permit history.
Condo sfth replace front doors with new 36 ada compliant door for livable homes tax credit
Valuation:
N/A
Permit #:
B19003384
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Master Seal, Inc License info
Verified License
| License # | 26857 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Master Seal, Inc 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 # | 26857 |
| Status | Active |
| State | Pennsylvania |
| Type | Contractor |
- When BuildZoom last verified this license, it had an expiration date of August, 2015. Check the current license status of Master Seal, Inc with the Pennsylvania Office of the Attorney General
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 49775 |
| Status | Active |
| State | Maryland |
| Type | Contractor (Corppart) Home Improvement |
- When BuildZoom last verified this license, it had an expiration date of August, 2015. Check the current license status of Master Seal, Inc with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 26857 |
| Status | Inactive |
| State | Maryland |
| Type | Home Improvement |
- 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 Master Seal, Inc at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
- How the BuildZoom Score works
- *No active license on file. If you are Master Seal, Inc, click “This is My Business” to update your information.
Master Seal, Inc Employees
JD
John Paul Dennis
Owner
MI
Master Seal Inc
Owner
Hello, Master Seal company is the "Best" I know they price is up, but the quality is the "Best"., .And the worker (Mr. Ron Behr) was great!!!
He started, and didn't stop for lunch he just kept on working until the job was finish. And it was the best I have every seen. I will never order from anything from Home Depot every again: Master Seal, will get my order again for the future. I will refer Master Seat company to my friends that have homes.
My is Joyce Mapp; 1325 Spring Ave.
Thank you again