Updated: May 26, 2026
Location and Projects
Address
52 Hawthorne Road, Waltham, MA, 02451
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Dennis Costa, Owner Construction
Dennis Costa, Owner, 52 Hawthorne Rd, Waltham, MA (Owned by: John Mernick) holds a Home Improvement Contractor license and 6 other licenses according to the Massachusetts license board.
Their BuildZoom score of 93 ranks in the top 27% of 139,240 Massachusetts licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Dennis Costa, Owner, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Dennis Costa, Owner Services
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Dennis Costa, Owner Contact Information
Phone Number: (401) 234-3900
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Address: 52 Hawthorne Road, Waltham, MA 02451
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This is a sample of this contractor's permits. Click here to access their complete permit history.
1fam remove and replace roof shingles
Valuation:
N/A
Permit #:
24B1-2FAM-00020RE
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Dennis Costa, Owner License info
Verified License
| License # | 210267 |
| Status | Active |
| State | Massachusetts |
| Type | Home Improvement Contractor |
| Date Issued | 11-08-2025 |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Dennis Costa, Owner at the Mass.gov Consumer Affairs and Business Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 210267 |
| Status | Active |
| City | Newton |
| Type | Residential Builder |
- When BuildZoom last verified this license, it had an expiration date of December, 2022. Check the current license status of Dennis Costa, Owner with the City of Newton Massachusetts
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 210267 |
| Status | Active |
| City | Newton |
| Type | Building Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2022. Check the current license status of Dennis Costa, Owner with the City of Newton Massachusetts
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 106305 |
| Status | Active |
| City | Newton |
| Type | General Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2022. Check the current license status of Dennis Costa, Owner with the City of Newton Massachusetts
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 111162 |
| Status | Active |
| City | Newton |
| Type | Electrical Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2021. Check the current license status of Dennis Costa, Owner with the City of Newton Massachusetts
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 111162 |
| Status | Active |
| City | Newton |
| Type | General Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2022. Check the current license status of Dennis Costa, Owner with the City of Newton Massachusetts
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 106305 |
| Status | Active |
| City | Newton |
| Type | Electrical Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2022. Check the current license status of Dennis Costa, Owner with the City of Newton Massachusetts
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
Dennis Costa, Owner Employees
DC
Dennis Costa
Owner
JC
James De Costa
Owner
JM
John Mernick
Owner