Updated: May 29, 2026
Location and Projects
Address
25 LEDGE HILL RD, Guilford, CT, 06437
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John Sullivan HVAC/Mechanical Contractor
John Sullivan, 25 Ledge Hill Rd, Guilford, CT holds a Heating, Piping & Cooling Unlimited Contractor license and 3 other licenses 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 John Sullivan, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
John Sullivan Contact Information
Address: 25 LEDGE HILL RD, Guilford, CT 06437
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Installing new hvac systems - 4 units per fire marshal: infor required for locations and protection regarding rated enclosures
Valuation:
N/A
Permit #:
M-17-42
Status:
complete
Fee:
$10
Permit Type:
N/A
Building Type:
N/A
Install two new natural gas hvac 130, 000 btu units and two 5 ton air conditioning systems
Valuation:
$22,000
Permit #:
M-17-139
Status:
expired
Fee:
$20
Permit Type:
N/A
Building Type:
N/A
20111396-c020
Valuation:
N/A
Permit #:
RES-NEW-11-101539
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Sign off: repave and widen driveway single family residence
Valuation:
N/A
Permit #:
2010-1013
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
20121884-c020
Valuation:
N/A
Permit #:
RES-NEW-12-111162
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
John Sullivan License info
Verified License
| License # | HTG.0407810-S1 |
| Status | Active |
| State | Connecticut |
| Type | Heating, Piping & Cooling Unlimited Contractor |
| Date Issued | 09-01-2025 |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for John Sullivan at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | HTG.0303503-S1 |
| Status | Active |
| State | Connecticut |
| Type | Heating, Piping & Cooling Unlimited Contractor |
- When BuildZoom last verified this license, it had an expiration date of August, 2025. Check the current license status of John Sullivan with the Connecticut Department of Consumer Protection
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HTG.0307882-ST1 |
| Status | Inactive |
| State | Connecticut |
| Type | Heating, Piping & Cooling Limited 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 John Sullivan at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HTG.0307263-S7 |
| Status | Inactive |
| State | Connecticut |
| Type | Heating, Piping & Cooling Limited 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 John Sullivan at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
90
BuildZoom Score
John Sullivan Employees
JS
John Sullivan