Updated: Mar 22, 2026
Location and Projects
Address
37 Ayer Road Unit #9, Littleton, MA, 01460
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Combined Energy Systems HVAC/Mechanical Contractor
Combined Energy Systems, Inc, 37 Ayer Rd, Littleton, MA (Owned by: Stephen E Pittman) holds a Home Improvement Contractor license and 6 other licenses according to the Massachusetts license board.
Their BuildZoom score of 98 ranks in the top 16% of 139,240 Massachusetts licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Combined Energy Systems, Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Combined Energy Systems, Inc Contact Information
Phone Number: (978) 815-8872
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Address: 37 Ayer Road Unit #9, Littleton, MA 01460
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Combined Energy Systems, Inc Littleton
Quality
98
84th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Combined Energy Systems, Inc has a BuildZoom score of 98, which places them above 84% of 139,240 contractors in Massachusetts.
Activity
|
1 project
|
2025 |
|
1 project
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Combined Energy Systems, Inc has worked on at least
3.0 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
|
3 projects
|
Mechanical projects |
|
3 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Combined Energy Systems, Inc mostly works on
hvac project
and mechanical project
projects.
Pricing
|
2 projects
|
$50k-$100k |
|
1 project
|
$250k-$500k |
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 Combined Energy Systems, Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Renovate an indoor swimming pool room including: * remove/replace existing dehumidifier. * remove replace existing remote condenser. * addition new heat recovery ventilator. * addition new negative pressure fan. * addition new ductwork system (pcd & galvanized). * addition new mini-split heat/cool system @ gym. * range exhaust hood. compliant with 780 cmr and brookline zoning by laws
Valuation:
$89,250
Permit #:
MP-2023-000230
Status:
complete
Fee:
$1,800
Permit Type:
N/A
Building Type:
N/A
Install buried underground pcd duct system. install 1 dehumidifier with remote condenser. install 1 natural gas condensing boiler. install 1 heat recovery ventilator. install 1 negative pressure fan. install 1 warm air coil. install required control wiring
Valuation:
N/A
Permit #:
19-10SM
Status:
complete
Fee:
$1,135
Permit Type:
N/A
Building Type:
N/A
Install steel reinforced gunite inground swimming pool with related amenities
Valuation:
$99,000
Permit #:
R-21-0195
Status:
issued
Fee:
$525
Permit Type:
Poolinground
Building Type:
N/A
Install 1 3000 cfm dehumidifier 1 heat recovery ventilator 1 negative pressure fan w poly coated underground duct work all duct sealed before back fill. dict work within thermal barrier. bonus far
Valuation:
$18,000
Permit #:
19070344
Status:
filed
Fee:
$360
Permit Type:
N/A
Building Type:
N/A
We are replacing old pcd under slab duct work dehumidifier exhaust fan heat recovery ventilator and pool equipment
Valuation:
$80,000
Permit #:
MP-2020-000134
Status:
complete
Fee:
$1,600
Permit Type:
N/A
Building Type:
N/A
Building permit - residential (single 2-family or townhouses) projects
2021-10-04
Install indoor inground gunite swimming pool & spa w related amenities
Valuation:
$45,300
Permit #:
BR-21-11200
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Performing work on pool/spa room including: * underground pcd ductwork. * dehumidifier system. * heat recovery ventilator. * negative pressure fan. * gas-fired boiler system. * solar-thermal pool heating system. *all work must comply with 780 cmr and brookline zoning by-laws
Valuation:
$407,800
Permit #:
MP-2022-000274
Status:
complete
Fee:
$8,160
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
67082
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install outdoor gunite inground swimming pool with relate equipment and amenities
Valuation:
$111,000
Permit #:
10100568
Status:
complete
Fee:
$2,065
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
PLMB-036407-2016
Status:
issued
Fee:
N/A
Permit Type:
Replacement
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
GAS-036403-2016
Status:
issued
Fee:
N/A
Permit Type:
Replacement
Building Type:
N/A
Sheet metal permit
Valuation:
$0
Permit #:
BLD140449
Status:
IN PROGRESS
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
24 x 50 indoor pool
Valuation:
$0
Permit #:
BLD140547
Status:
IN PROGRESS
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Construct indoor swimming pool as per plans
Valuation:
$1,400,000
Permit #:
08100053
Status:
complete
Fee:
$3,795
Permit Type:
N/A
Building Type:
N/A
Pool
Valuation:
$225,000
Permit #:
13-012
Status:
N/A
Fee:
$2,250
Permit Type:
N/A
Building Type:
N/A
Install boiler
Valuation:
$23,500
Permit #:
GP-2016-0270
Status:
issued
Fee:
$480
Permit Type:
N/A
Building Type:
N/A
Install inground gunite swimming pool and spa fence to code by others
Valuation:
$76,800
Permit #:
05070844
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Pool install inground steel reinforced gunite pool and spa and related amenities
Valuation:
$65,000
Permit #:
BP-2004-0068
Status:
expired
Fee:
$650
Permit Type:
N/A
Building Type:
N/A
Mechanical permit for the install of a new dehumidifier and boiler and fresh air ventilator associated underground pcd ductwork. all duct to be within the thermal envelope of the building
Valuation:
$49,681
Permit #:
BP-2020-000432
Status:
withdrawn
Fee:
$50
Permit Type:
N/A
Building Type:
Single family dwe...
No Description Available
Valuation:
N/A
Permit #:
SCL12212
Status:
expired
Fee:
N/A
Permit Type:
N/a
Building Type:
N/A
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Combined Energy Systems, Inc Reviews
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Verified License
BuildZoom confirmed this contractor's license
Combined Energy Systems, Inc License info
Verified License
| License # | 195734 |
| Status | Active |
| State | Massachusetts |
| Type | Home Improvement Contractor |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Combined Energy Systems, Inc at the Mass.gov Consumer Affairs and Business Regulation.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 30891 |
| Status | Active |
| State | Rhode Island |
| Type | Residential And Commercial Contractor |
- BuildZoom has not verified this license since January, 2010.
Verify this license's status for Combined Energy Systems, Inc at the State of Rhode Island Contractors' Registration and Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 34407 |
| Status | Inactive |
| City | Newton |
| Type | Building Contractor |
- According to the City of Newton Massachusetts, 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 Combined Energy Systems, Inc at the City of Newton Massachusetts.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| 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. If this is your business, please update your license status.
Check this license's status for Combined Energy Systems, Inc at the City of Newton Massachusetts.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| State | Massachusetts |
| Type | Sheet Metal Business |
- According to the Commonwealth of Massachusetts E-Licensing Board, 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 Combined Energy Systems, Inc at the Commonwealth of Massachusetts E-Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 34407 |
| Status | Inactive |
| City | Newton |
| Type | Residential Builder |
- According to the City of Newton Massachusetts, 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 Combined Energy Systems, Inc at the City of Newton Massachusetts.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 104763 |
| Status | Inactive |
| State | Massachusetts |
| Type | Home Improvement Contractor |
- According to the Mass.gov Consumer Affairs and Business Regulation, 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 Combined Energy Systems, Inc at the Mass.gov Consumer Affairs and Business Regulation.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
16
Permits
- Building permit records show that Combined Energy Systems, Inc has worked on 16 permitted projects.
Combined Energy Systems, Inc Employees
MR
Mark Russell
Owner
RS
Richard J Sheridan
Owner
SP
Stephen E Pittman
Owner
SP
Stephen Pittman
Owner