Updated: Jun 08, 2026
Location and Projects
Address
5 COVE AVENUE, Norwalk, CT, 06850
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Harold Hermes HVAC/Mechanical Contractor
Harold Hermes, 5 Cove Ave, Norwalk, 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 Harold Hermes, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Harold Hermes Contact Information
Address: 5 COVE AVENUE, Norwalk, CT 06850
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace existing gas fired boiler with weil mcclain cgi4 and water heater
Valuation:
$7,200
Permit #:
M-19-715
Status:
complete
Fee:
$106
Permit Type:
Gas burner/gas bo...
Building Type:
Single family
Install central air conditioning unit with duct work
Valuation:
$11,000
Permit #:
BLD-2018-84138-02
Status:
complete
Fee:
$113
Permit Type:
N/A
Building Type:
N/A
Install central air conditioning unit with ductwork install 2 ductless splits
Valuation:
$20,000
Permit #:
BLD-2019-86049-01
Status:
complete
Fee:
$205
Permit Type:
N/A
Building Type:
N/A
Install erv & combustion air for existing boiler
Valuation:
$3,600
Permit #:
M-18-441
Status:
complete
Fee:
N/A
Permit Type:
HVAC
Building Type:
Single family
5/18/92- install 1 york air conditioning system including all piping & all controls but no electrical; work
Valuation:
$2,500
Permit #:
BLD-1992-51141-02
Status:
complete
Fee:
$26
Permit Type:
N/A
Building Type:
N/A
5/18/92-install 1 york air conditioning system including all duct work & piping but no electric work
Valuation:
$6,000
Permit #:
BLD-1992-51245-02
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Replace existing heat pump upstairs and install 2 new gas fired furnaces and gas piping
Valuation:
N/A
Permit #:
BLD-2012-75167-03
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
9/23/94- remove existing electric heat and replace with gas fired furnace also replace air conditioning with new unit apartment #1
Valuation:
$6,000
Permit #:
BLD-1994-53454-01
Status:
filed
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Install 2 carrier central air conditioning systems including duct work ( equip. must be installed above flood elevation!!!!)
Valuation:
$18,000
Permit #:
BLD-1998-57293-03
Status:
complete
Fee:
$146
Permit Type:
N/A
Building Type:
N/A
Replace existing 3.5 ton system with new trane air conditioning system
Valuation:
$7,000
Permit #:
BLD-2012-75037-01
Status:
complete
Fee:
$72
Permit Type:
N/A
Building Type:
N/A
Install 9 air conditioning systems and 4 exhaust fans
Valuation:
$131,000
Permit #:
BLD-1999-59222-08
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 4 new gas fired warm air furnaces and 4 new condensing units
Valuation:
N/A
Permit #:
M-03-98
Status:
complete
Fee:
N/A
Permit Type:
Air conditioning
Building Type:
N/A
10/07/92- install 2 air conditioning units - 1 for each of 2 floors - all subject to planning & zoning approval
Valuation:
$8,000
Permit #:
BLD-1992-51501-04
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
12/12/91 - extend main duct & install 5 branch supply outlets
Valuation:
$1,000
Permit #:
BLD-1991-50626-03
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Supply & install 1 - 3ton central air conditioning system using ozone friendly refrigerant (r-410a)
Valuation:
$13,000
Permit #:
BLD-2006-67524-01
Status:
filed
Fee:
$132
Permit Type:
N/A
Building Type:
N/A
Oil to gas convertions. install new elite 200, 000 bta boiler with gas lines
Valuation:
$10,000
Permit #:
BLD-2011-73850-01
Status:
complete
Fee:
$103
Permit Type:
N/A
Building Type:
N/A
Install new air conditioning system complete with duct work & tie into existing boiler for heat
Valuation:
$13,000
Permit #:
BLD-2005-66281-01
Status:
complete
Fee:
$132
Permit Type:
N/A
Building Type:
N/A
Installation of 40 ton replacement and 8 fans and 10 ton split and install two direct vent boilers
Valuation:
N/A
Permit #:
M-2011-0175
Status:
complete
Fee:
N/A
Permit Type:
437 alter. To com...
Building Type:
Commercial building
Replace 3 rtu's with new that weigh less than existing with curb adaptors
Valuation:
$35,000
Permit #:
M-11-415
Status:
issued
Fee:
$846
Permit Type:
Mechanical - c
Building Type:
Commercial
Install 4 new heat & air conditioning units 2 oil fired & 2 heat pumps
Valuation:
$35,000
Permit #:
BLD-2001-61573-03
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
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Harold Hermes License info
Verified License
| License # | HTG.0308704-D1 |
| Status | Active |
| State | Connecticut |
| Type | Heating, Piping & Cooling Limited Contractor |
| Date Issued | 09-01-2025 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Harold Hermes at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
91
BuildZoom Score
90
Permits
- Building permit records show that Harold Hermes has worked on 90 permitted projects.
Harold Hermes Employees
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Harold Hermes