Updated: Jul 17, 2026
Location and Projects
Address
40 RIDGEBURY RD, Ridgefield, CT, 06877
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Thomas Underhill HVAC/Mechanical Contractor
Thomas Underhill, 40 Ridgebury Rd, Ridgefield, CT holds a Heating, Piping & Cooling Limited Contractor license according to the Connecticut license board.
Their BuildZoom score of 91 ranks in the top 37% of 12,093 Connecticut licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Thomas Underhill, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Thomas Underhill Contact Information
Address: 40 RIDGEBURY RD, Ridgefield, CT 06877
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace boiler and indirect water heater
Valuation:
$5,000
Permit #:
M-19-80
Status:
complete
Fee:
N/A
Permit Type:
Water heater
Building Type:
Single family
Run gas line for oil to nat. gas conversion. apply air test to same meter bar at location
Valuation:
$6,000
Permit #:
BLD-2012-75469-02
Status:
filed
Fee:
$62
Permit Type:
N/A
Building Type:
N/A
After the fact permit for oil tank that was installed without a permit by others
Valuation:
$500
Permit #:
M-20-181
Status:
issued
Fee:
N/A
Permit Type:
Oil tanks - resid...
Building Type:
Single family
Installing natural gas fired warm air direct vent furnaces in main house and cottage.retrofit to code
Valuation:
$4,000
Permit #:
M-12-03491
Status:
issued
Fee:
N/A
Permit Type:
Mechanical pmt un...
Building Type:
N/A
Installing 3 natural gas direct vent fired furnaces 1st 2nd 3rd floors. as per code
Valuation:
$3,500
Permit #:
M-12-03492
Status:
issued
Fee:
N/A
Permit Type:
Mechanical pmt un...
Building Type:
N/A
Install 70 gallon direct vent water heater. 30 of hot water baseboard and modine heater for garage
Valuation:
N/A
Permit #:
M-12-99
Status:
issued
Fee:
N/A
Permit Type:
Water heater
Building Type:
N/A
Install 7 of trac pipe for a propane kitchen stove
Valuation:
N/A
Permit #:
M-10-50
Status:
issued
Fee:
N/A
Permit Type:
Gas line
Building Type:
N/A
Install a 45, 000 btu natural gas replacement furnace, running 50 of 1/2 trac-pipe, as per code
Valuation:
$2,000
Permit #:
M-10-02099
Status:
issued
Fee:
N/A
Permit Type:
Mechanical pmt un...
Building Type:
N/A
Install new boiler
Valuation:
N/A
Permit #:
M-10-22
Status:
complete
Fee:
N/A
Permit Type:
Mechanical: boile...
Building Type:
N/A
Install all piping for new boiler and twin 275 gal. oil tanks
Valuation:
$7,000
Permit #:
BLD-1996-55562-07
Status:
final
Fee:
$58
Permit Type:
N/A
Building Type:
N/A
Install two new 70, 000 btu furnaces with associated gas piping
Valuation:
$6,000
Permit #:
M-09-00138
Status:
issued
Fee:
N/A
Permit Type:
Mechanical pmt un...
Building Type:
N/A
Gas pressure line test for 2nd & 3rd floor meters to code
Valuation:
$200
Permit #:
M-10-00421
Status:
issued
Fee:
N/A
Permit Type:
Mechanical pmt un...
Building Type:
N/A
Install replacement boiler and pipe 7 air handlers
Valuation:
$7,000
Permit #:
BLD-1997-56170-03
Status:
final
Fee:
$58
Permit Type:
N/A
Building Type:
N/A
Re-pipe existing boilers; pipe four air handler units
Valuation:
$3,000
Permit #:
BLD-1998-57096-01
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install a new 50, 000 btu gas boiler, as per code
Valuation:
$2,000
Permit #:
M-10-03276
Status:
issued
Fee:
N/A
Permit Type:
Mechanical pmt un...
Building Type:
N/A
No Description Available
Valuation:
$95,000
Permit #:
03-680/000 000 PLB1 01
Status:
C.O. ISSUED
Fee:
$957
Permit Type:
Residence plumbin...
Building Type:
N/A
New boiler, hwh, piping
Valuation:
$600,000
Permit #:
07-263/000 000 HVA1 01
Status:
C.O. ISSUED
Fee:
$6,165
Permit Type:
Residence HVAC pe...
Building Type:
N/A
No Description Available
Valuation:
$600,000
Permit #:
07-263/000 000 FUL1 00
Status:
C.O. ISSUED
Fee:
$6,165
Permit Type:
Oil and gas tank ...
Building Type:
N/A
Installation of 330 gallon oil tank in basement
Valuation:
N/A
Permit #:
M-03-191
Status:
issued
Fee:
N/A
Permit Type:
Mechanical: tank
Building Type:
N/A
Family room addition over existing garage
Valuation:
N/A
Permit #:
M-06-267
Status:
complete
Fee:
N/A
Permit Type:
Addition - reside...
Building Type:
N/A
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Thomas Underhill License info
Verified License
| License # | HTG.0308922-S7 |
| Status | Active |
| State | Connecticut |
| Type | Heating, Piping & Cooling Limited Contractor |
| Date Issued | 09-01-2025 |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Thomas Underhill at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
91
BuildZoom Score
25
Permits
- Building permit records show that Thomas Underhill has worked on 25 permitted projects.
Thomas Underhill Employees
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Thomas Underhill