Updated: Jun 30, 2026
Location and Projects
Address
210 Kuniholm Dr, Holliston, MA, 01746
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Sumzero Energy Systems Photos
Sumzero Energy Systems HVAC/Mechanical Contractor
Our goal is to educate homeowners and professionals that are looking for ways to implement energy-efficient solutions to any home improvement, remodel, or new construction project. Our solutions are based on building-science principles to make the home as energy-efficient as possible. We use ductless HVAC, spray foam insulation, and energy audits as our main instruments in improving your energy efficiency.
From BuildZoom: Sumzero Energy Systems, 210 Kuniholm Dr, Holliston, MA holds a Electrical Business license and 2 other licenses according to the Massachusetts license board.
Their BuildZoom score of 114 ranks in the top 2% of 139,240 Massachusetts licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Sumzero Energy Systems, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Sumzero Energy Systems Contact Information
Phone Number: (617) 279-3504
Address: 210 Kuniholm Dr, Holliston, MA 01746
Sumzero Energy Systems Holliston
Quality
114
98th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Sumzero Energy Systems has a BuildZoom score of 114, which places them above 98% of 139,240 contractors in Massachusetts.
Activity
|
1 project
|
2026 |
|
37 projects
|
2025 |
|
6 projects
|
2024 |
|
7 projects
|
2023 |
Our building permit records indicate that Sumzero Energy Systems has worked on at least
51.0 projects over the past 3 years.
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.
Experience
|
43 projects
|
HVAC projects |
|
19 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Sumzero Energy Systems mostly works on
hvac project
and mechanical project
projects.
Pricing
|
14 projects
|
< $5k |
|
20 projects
|
$5k-$20k |
|
10 projects
|
$20k-$50k |
|
4 projects
|
$50k-$100k |
The typical size of their permits is approximately $14,000. This graph shows the distribution of these job values.
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 Sumzero Energy Systems
This is a sample of this contractor's permits. Click here to access their complete permit history.
- new installation of 1 complete hvac equipments. - system #1 will consist of ducted system to serve the entire home. - this system comes with brand new ductwork which will consist of rigid trunk lines and flexible duct branches. ductwork will be insulated with r-8 insulation. sq ft is under 10 000 sq ft. renovation. work to be completed: hvac
Valuation:
$16,350
Permit #:
BLD250877
Status:
issued
Fee:
$245
Permit Type:
N/A
Building Type:
N/A
- new installation of 1 complete hvac equipment. - system #1 will consist five zone ductless system to serve the entire home. sq ft is under 10 000 sq ft. new work. work to be completed: hvac
Valuation:
$16,400
Permit #:
BLD250720
Status:
issued
Fee:
$246
Permit Type:
N/A
Building Type:
N/A
- replacement installation of 1 complete hvac equipment. - system #1 will consist of ducted system to serve the entire home. sq ft is under 10 000 sq ft. renovation. work to be completed: hvac
Valuation:
$8,900
Permit #:
BLD250972
Status:
issued
Fee:
$134
Permit Type:
N/A
Building Type:
N/A
New 90% furnace and ducted heat pump. replacing existing units all using existing ductwork. sq ft is under 10 000 sq ft. renovation. work to be completed: hvac
Valuation:
$16,000
Permit #:
BLD250227
Status:
issued
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Installation of (2) heat pump condensers with (2) coils to serve the entire home. no ductwork will be added or changed. compliant with 780 cmr and brookline zoning by laws
Valuation:
$22,300
Permit #:
MP-2025-000387
Status:
issued
Fee:
$460
Permit Type:
N/A
Building Type:
N/A
- installation of (2) single zone ducted systems. sq ft is under 10 000 sq ft. renovation. work to be completed: hvac
Valuation:
$10,500
Permit #:
BLD251128
Status:
issued
Fee:
$158
Permit Type:
N/A
Building Type:
N/A
- new installation of 1 complete hvac equipments. - system #1 will consist single zone ductless system to serve a bedroom
Valuation:
$3,250
Permit #:
MP-2025-000115
Status:
triage
Fee:
$80
Permit Type:
N/A
Building Type:
N/A
Installation of (2) heat pump systems to serve the entire home. (1) is a coil/heat pump condenser installation. the other (1) is a two zone ductless system. compliant with 780 cmr and brookline zoning by laws
Valuation:
$14,200
Permit #:
MP-2025-000354
Status:
issued
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Install 1 central air conditioning and heatinstall 1 natural gas furnace 95% high efficiency 2 stage.install 1 condenser 13 seerinstall make ductwork for second floor install make ductwork for firfloor. all ductwork sealed and insulation r8
Valuation:
$19,800
Permit #:
M-23-35
Status:
issued
Fee:
N/A
Permit Type:
HVAC
Building Type:
N/A
Installation of two systems one in the attic with sealed and insulated duct 2nd system will be in the basement with sealed and insulated ducts both systems will be heat pump we install two erv for the house *all work must comply with 780 cmr and brookline zoning by-laws
Valuation:
$45,500
Permit #:
MP-2023-000409
Status:
complete
Fee:
$920
Permit Type:
N/A
Building Type:
N/A
Installation of (2) heat pumps with (1) coil and (1) wall unit to serve the entire home compliant with 780 cmr and brookline zoning by laws
Valuation:
$14,675
Permit #:
MP-2025-000385
Status:
issued
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Installation of (2) mitsubishi ductless heat pump systems with (7) indoor units to serve the home. no ductwork being added or removed
Valuation:
$22,400
Permit #:
M-25-1612
Status:
issued
Fee:
$254
Permit Type:
Renovation
Building Type:
N/A
Installation of the 2 new hvac systems. one system will serve first floor and 2nd and 3rd floor will be served by 2nd hvac system. both systems will consist of insulated rigid and flexible ducts
Valuation:
$46,000
Permit #:
MP-2022-000344
Status:
issued
Fee:
$920
Permit Type:
N/A
Building Type:
N/A
Furnace coil and condenser replacement all ducts will remaingthe same only doing sheetmetal to accommodate the new equipment compliant with 780 cmr and brookline zoning by laws
Valuation:
$12,000
Permit #:
MP-2025-000215
Status:
issued
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
- panel upgrade from 100amp to 200amp - wiring of 1 heat pump condenser - gfci outlet (1) * heat pumps (tons/kw) capacity 3.3 3;
Valuation:
$2,500
Permit #:
BLDE251241
Status:
issued
Fee:
$125
Permit Type:
N/A
Building Type:
N/A
- installation of mixed system to serve the entire home. sq ft is under 10 000 sq ft. new work. work to be completed: hvac
Valuation:
$15,500
Permit #:
BLD251678
Status:
issued
Fee:
$233
Permit Type:
N/A
Building Type:
N/A
Replacement of furnace and install of heatpump condenser using existing ductwork. sq ft is under 10 000 sq ft. new work. work to be completed: hvac
Valuation:
$14,000
Permit #:
BLD242560
Status:
issued
Fee:
$210
Permit Type:
N/A
Building Type:
N/A
Installation of (3) zone ductless system to serve the entire home
Valuation:
$8,900
Permit #:
M-25-1017
Status:
issued
Fee:
$119
Permit Type:
New
Building Type:
N/A
Install heatpump condenser and swap furnace x2 use existing ductwork. sq ft is under 10 000 sq ft. new work. work to be completed: hvac
Valuation:
$31,000
Permit #:
BLD242912
Status:
issued
Fee:
$465
Permit Type:
N/A
Building Type:
N/A
Installation of (2) ducted systems to serve the entire home. existing ductwork will not be added onto or removed
Valuation:
$14,700
Permit #:
MEC-25-0672
Status:
issued
Fee:
$120
Permit Type:
Replacement
Building Type:
N/A
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Verified License
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Sumzero Energy Systems License info
Verified License
| License # | 9052 |
| Status | Active |
| State | Massachusetts |
| Type | Electrical Business |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Sumzero Energy Systems at the Commonwealth of Massachusetts E-Licensing Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| State | Massachusetts |
| Type | Sheet Metal Business |
- When BuildZoom last verified this license, it had an expiration date of February, 2026. Check the current license status of Sumzero Energy Systems with the Commonwealth of Massachusetts E-Licensing Board
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 12091 |
| Status | Inactive |
| City | Newton |
| Type | Sheetmetal Contractor |
- According to the City of Newton Massachusetts, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Sumzero Energy Systems at the City of Newton Massachusetts.
This is a sample of licensing data; click here to access a complete history.
114
BuildZoom Score
66
Permits
- Building permit records show that Sumzero Energy Systems has worked on 66 permitted projects.