Updated: Jun 05, 2026
Location and Projects
Address
167 PAPER MILL RD, Marlborough, CT, 06447
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Lassen Heating & Cooling LLC
Lassen Heating & Cooling LLC, 167 Paper Mill Rd, Marlborough, CT (Employee: Sean Lassen) holds a Heating, Piping & Cooling Limited Contractor license and 1 other license according to the Connecticut license board.
Their BuildZoom score of 95 ranks in the top 22% of 12,093 Connecticut licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Lassen Heating & Cooling LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Lassen Heating & Cooling LLC Contact Information
Phone Number: (860) 951-5086
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Address: 167 PAPER MILL RD, Marlborough, CT 06447
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Lassen Heating & Cooling LLC Marlborough
Quality
95
78th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Lassen Heating & Cooling LLC has a BuildZoom score of 95, which places them above 78% of 12,093 contractors in Connecticut.
Activity
|
1 project
|
2025 |
Our building permit records indicate that Lassen Heating & Cooling LLC has worked on at least
1.0 project 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
|
$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.
Building Permits by Lassen Heating & Cooling LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Installation of a carrier lp 40 000 btu furnace with a carrier up to 16 seer 2 ton air conditioning with all associated duct work in the envelope of the home. the system will have 2 zones
Valuation:
$22,900
Permit #:
BLD25-00178
Status:
issued
Fee:
$31
Permit Type:
N/A
Building Type:
N/A
Installation of a carrier infinity natural gas furnace with a 3-ton 2-stage air conditioning unit (2) zones with all associated ductwork inside the envelope
Valuation:
$17,000
Permit #:
PRHV20190000192
Status:
issued
Fee:
$308
Permit Type:
HVAC
Building Type:
One family dwelli...
Installation of carrier infinity lp furnace with two-stage air conditioning. there will be three zones and all associated ductwork to complete the job
Valuation:
N/A
Permit #:
MP-2020-0043
Status:
final
Fee:
$30
Permit Type:
N/A
Building Type:
N/A
Replace existing air conditioning units outdoor and indoor units to more efficient systems. installing (3) new carrier 2-ton infinity communication systems 2-stage variable speed
Valuation:
$25,000
Permit #:
PRHV20180001543
Status:
final
Fee:
$446
Permit Type:
HVAC
Building Type:
One family dwelli...
Addition 4 supplies and 1 return to addition on 2nd floor split 2nd floor into 2 zones install 4 new thermostats
Valuation:
N/A
Permit #:
BLD-2017-83332-02
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacement of a gas furnace and air conditioning system
Valuation:
$3,000
Permit #:
18209
Status:
issued
Fee:
N/A
Permit Type:
Boiler/furnace re...
Building Type:
Single family att...
Installation of (2) carrier 59mn7a060v17 furnaces with (2) 17seer air conditioning units. 1st floor has (1) zone 2nd and 3rd floors each have (2) zones. all associated ductwork to be insulated
Valuation:
$18,000
Permit #:
PRHV20160004341
Status:
issued
Fee:
$325
Permit Type:
HVAC
Building Type:
One family dwelli...
Replacement of a gas warm air furnace. we will be replacing a lennox gas furnace with a new ducane gas furnace
Valuation:
$2,300
Permit #:
9260
Status:
issued
Fee:
N/A
Permit Type:
Boiler/furnace re...
Building Type:
Single family
Replace existing air conditioning units outdoor & indoor units to more efficient systems. installing (30 new carrier 2-ton infinity communication systems 2-stage variable speed
Valuation:
$25,000
Permit #:
PRHV20180001543
Status:
Finaled
Fee:
N/A
Permit Type:
HVAC
Building Type:
One family dwelli...
Installation of a new carrier infinity lp furnace with a 17 seer air conditioning unit. all associated duct work with 2 zones are on the first floor one on the second floor. (gas pipe & kitchen exhaust). tr # 43357
Valuation:
N/A
Permit #:
MP-2018-0018
Status:
issued
Fee:
$30
Permit Type:
N/A
Building Type:
N/A
Installation of a new gas furnace with air conditioning. all new duckwork and 2 zone-3 zones for 2nd floor attic area see bd 14-4348
Valuation:
$18,000
Permit #:
PRHV20150003127
Status:
final
Fee:
$325
Permit Type:
HVAC
Building Type:
One family dwelli...
Replace the furnace with exactly the same furnace because we couldn't get a new heat exchanger in time. the old furnaces heat exchanger was bad
Valuation:
$1,000
Permit #:
19-14M
Status:
approved
Fee:
$32
Permit Type:
Residential mecha...
Building Type:
N/A
Replacement of an existing gas furnace and air conditioning system
Valuation:
$4,600
Permit #:
9755
Status:
issued
Fee:
N/A
Permit Type:
HVAC:air conditio...
Building Type:
Single family att...
Replace a gas furnace and air conditioning system
Valuation:
$5,750
Permit #:
M-17-248
Status:
issued
Fee:
$111
Permit Type:
Boiler/furnace re...
Building Type:
Single family
No Description Available
Valuation:
$15,000
Permit #:
M-17-466
Status:
issued
Fee:
$258
Permit Type:
HVAC - c
Building Type:
One & two family
Hvac
Valuation:
$2,500
Permit #:
TM-16-22318
Status:
Online Application
Fee:
$51
Permit Type:
Residential
Building Type:
Single family
No Description Available
Valuation:
N/A
Permit #:
M-18-80
Status:
issued
Fee:
$17
Permit Type:
HVAC - c
Building Type:
One & two family
No Description Available
Valuation:
N/A
Permit #:
M-18-13
Status:
complete
Fee:
$17
Permit Type:
HVAC:air conditio...
Building Type:
One & two family
No Description Available
Valuation:
$16,000
Permit #:
M-17-19
Status:
issued
Fee:
$276
Permit Type:
HVAC - c
Building Type:
One & two family
Gas piping and installing owner supplied roof top units
Valuation:
$4,200
Permit #:
20110080
Status:
I
Fee:
N/A
Permit Type:
Commercial mechan...
Building Type:
N/A
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Lassen Heating & Cooling LLC Reviews
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Verified License
BuildZoom confirmed this contractor's license
Lassen Heating & Cooling LLC License info
Verified License
| License # | HTG.0405181-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 Lassen Heating & Cooling LLC at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | HIC.0657635 |
| Status | Active |
| State | Connecticut |
| Type | Home Improvement Contractor |
| Date Issued | 04-01-2026 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Lassen Heating & Cooling LLC at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
95
BuildZoom Score
28
Permits
- Building permit records show that Lassen Heating & Cooling LLC has worked on 28 permitted projects.
Lassen Heating & Cooling LLC Employees
SL
Sean Lassen