Updated: Jul 14, 2026
Location and Projects
Headquarters Address
265 MONTGOMERY RD, Westfield, MA, 01085
Local address
65 SEASIDE AVE STE 4, Stamford, CT, 06901
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John Mastroianni Electrician
John Mastroianni, 65 Seaside Ave, Stamford, CT (Employee: Gregory Mastroianni) holds a Electrical Unlimited Contractor license and 1 other license according to the Connecticut license board.
Their BuildZoom score of 94 ranks in the top 24% of 12,093 Connecticut licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring John Mastroianni, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
John Mastroianni Contact Information
Headquarters Address: 265 MONTGOMERY RD, Westfield, MA, 01085
Local Address: 65 SEASIDE AVE STE 4, Stamford, CT 06901
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John Mastroianni Stamford
Quality
94
76th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
John Mastroianni has a BuildZoom score of 94, which places them above 76% of 12,093 contractors in Connecticut.
Activity
|
3 projects
|
2025 |
Our building permit records indicate that John Mastroianni has worked on at least
3.0 projects over the past year.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
|
1 project
|
< $5k |
|
1 project
|
$5k-$20k |
|
1 project
|
$20k-$50k |
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Installation of 21 roof mounted solar panels 8.93kw. crs# 19654626 ca issued 1/13/25
Valuation:
$22,325
Permit #:
E-24-46537
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
100 to 200 amp upgrade
Valuation:
$3,000
Permit #:
E-25-00626
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
10 x 20'6 deck extension. to exst. single family residence unit #1
Valuation:
N/A
Permit #:
2008-27
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacement of kitchen cabinets
Valuation:
N/A
Permit #:
2015-727
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1-story addition
Valuation:
N/A
Permit #:
1996-515
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Direct replacement of existing gas combi boiler with altac-200 combi gas boiler ca issued 11/6/25
Valuation:
$15,500
Permit #:
M-25-30383
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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John Mastroianni License info
Verified License
| License # | ELC.0201906-E1 |
| Status | Active |
| State | Connecticut |
| Type | Electrical Unlimited Contractor |
| Date Issued | 10-01-2025 |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for John Mastroianni at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | PLM.0289747-J3 |
| Status | Active |
| State | Connecticut |
| Type | Plumbing & Piping Limited Contractor |
| Date Issued | 11-01-2025 |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for John Mastroianni at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
John Mastroianni Employees
GM
Gregory Mastroianni
JM
John Mastroianni