Updated: Jun 10, 2026
Location and Projects
Address
105 HIGH ROCK RD, Sandy Hook, CT, 06482
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Calvin M Blackwell Sr Construction
Calvin M Blackwell Sr, 105 High Rock Rd, Sandy Hook, CT holds a New Home Contractor license and 1 other license according to the Connecticut license board.
Their BuildZoom score of 90 indicates that they are licensed or registered but we do not have additional information about them.
Their license was verified as active when we last checked. If you are thinking of hiring Calvin M Blackwell Sr, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Calvin M Blackwell Sr Services
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Calvin M Blackwell Sr Contact Information
Address: 105 HIGH ROCK RD, Sandy Hook, CT 06482
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Building Permits by Calvin M Blackwell Sr
This is a sample of this contractor's permits. Click here to access their complete permit history.
Storm damage repair: replace roof rafters and roofing & siding **08/30/18 permit amended to include 2nd story addition with bedroom & bathroom (not storm damage)***
Valuation:
N/A
Permit #:
B-18-343
Status:
complete
Fee:
N/A
Permit Type:
Residential addition
Building Type:
N/A
Storm damage repairs: replace damaged roof rafters and re-reoof replace exterior walls install new windows replace siding on portion of home to match existging
Valuation:
$65,000
Permit #:
B-18-341
Status:
issued
Fee:
N/A
Permit Type:
Basic repair
Building Type:
N/A
Garage addition *** 10/24/17 permit amended to include removing deck and replacing with a concrete patio with roof***note: original permit # b-17-191***
Valuation:
$75,000
Permit #:
B-17-187
Status:
complete
Fee:
N/A
Permit Type:
Residential addition
Building Type:
N/A
Reroof asphalt shingles
Valuation:
$7,200
Permit #:
B-17-243
Status:
issued
Fee:
N/A
Permit Type:
Roofing -residential
Building Type:
N/A
Convert garage into family room
Valuation:
N/A
Permit #:
B-17-191
Status:
complete
Fee:
N/A
Permit Type:
Residential inter...
Building Type:
N/A
2 car garage with storage above
Valuation:
N/A
Permit #:
B-17-247
Status:
complete
Fee:
N/A
Permit Type:
Garage/carport
Building Type:
N/A
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Verified License
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Calvin M Blackwell Sr License info
Verified License
| License # | NHC.0000944 |
| Status | Active |
| State | Connecticut |
| Type | New Home Contractor |
| Date Issued | 04-01-2026 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Calvin M Blackwell Sr at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HIC.0547961 |
| Status | Inactive |
| State | Connecticut |
| Type | Home Improvement Contractor |
- According to the Connecticut Department of Consumer Protection, 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 Calvin M Blackwell Sr at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.