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TRUSTED BY LANCASTER, MA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon10
    Verified energy efficiency auditing services reviews

Top-Rated Energy efficiency auditors in Lancaster - Updated Nov 2026

Avatar for AVID Energy Solutions
AVID Energy Solutions
4.9(
19
)
Home Energy AuditEnergy Audit - For Business

Serving Lancaster, MA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"I recently had my attic insulated by this company and had a great experience from start to finish. The entire process, from the initial energy audit to customer service and the final installation, was smooth, professional, and well organized. The crew was incredibly kind, hardworking, and patient with all of my questions while they were on site. You can really tell this is a business with a family feel — everyone treated us with care and respect, and it made the whole experience much more comfortable. I would recommend."
92 neighbors recently requested a quote
Avatar for Green Collar
Green Collar
4.6(
37
)
Home Energy AuditEnergy Audit - For Business

Serving Lancaster, MA and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"fantastic honest company with highly competent energy advisor and crew.They were efficient and cleaned up after the job.I did not have to lift a finger.Do yourself a favor and call them or send an email.You won't regret it."
Net and Blow
Ceiling net and blow
Truck in Driveway
Knee Wall Slope 2" Board
Attic Open Blow Cellulose

+2

Response time2 days
Response rate86%
57 neighbors recently requested a quote
Avatar for Airco Home Comfort Services LLC
Airco Home Comfort Services LLC
4.7(
33
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, MA and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

Specializing in all HVAC/R services to include Geothermal Heating and Cooling. Ground Source Heat Pump services. Additional service area: Chelmsford-Haverhill, Boxford-Gloucester, Manchester-Nashua & Portions Of Downtown. No interest Financing available and all major credit cards accepted. Additional DBA - Airco Heating & Cooling. Additional email - [email protected]. Master Sheet Metal License: 1325 and Master Plumber License: 11593

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+4

Response time2 days
1 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Gabriel Hahn
Gabriel Hahn
New to Angi
Home Energy Audit

Serving Lancaster, MA and surrounding areas

Approved

Emergency services offered

Small jobs welcome

Credit card accepted

I conduct energy audit tests for homes, whether they are colonial or brand new construction. I can recommend you various forms of weathersealant, thermal wrappings, and storm window techniques, saving you thousands in the form of long-term heat insulation tech-forward solutions.

Sustainable Energy Managemnt Group
New to Angi
Energy Audit - For Business

Serving Lancaster, MA and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

One of the best in terms of reliable Solar work in the area. Established and credible company working with professionals who specialize in things from roof mounted, or parking lot solar electricity, to energy assessments. The President, Cameron, is a strong advocate for all of his clients giving good energy advice that saves money.

Avatar for The Energy Monster, Inc.
The Energy Monster, Inc.
5.0(
6
)
Home Energy Audit

Serving Lancaster, MA and surrounding areas

In business since 2011

Free estimates

Credit card accepted

"Energy monster was very courteous, knowledgeable, and went way beyond, they cleaned , and vacuumed after all work was done, I would highly recommend them to everyone...outstanding company , shamus and his crew were awesome."
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Recommended by100%of homeowners
Avatar for Tingley Electric Services Inc
Tingley Electric Services Inc
4.7(
219
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, MA and surrounding areas

In business since 2003

Credit card accepted

"The two fellows were prompt and professional.. My two light switch issues were quickly corrected by using the proper light bulbs.. Those energy savers don't work on everything!  We are doing basement work and they did the wiring for new lights as well.  Should I need more done, I wouldn't hesitate to use them again.
"
Our Staff
Our Staff
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+1

Recommended by95%of homeowners
Avatar for Commonwealth Energy MA
Commonwealth Energy MA
4.5(
32
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, MA and surrounding areas

In business since 2017

Free estimates

Credit card accepted

"Words can’t explain how excellent of a consultant Julian is ! I was very indecisive about solar until Julian gave me all the information I needed on behalf of solar while saving me a ton of money. I reffed my whole family to him and if anyone is looking to go solar or get information on solar definitely contact Julian ! his personality is unreal making you feel more like family. I’m glad to be apart of Commonwealth energy !"
Methuen installation
Methuen installation
Methuen installation
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+5

Recommended by84%of homeowners
Avatar for The Energy Monster MA, Inc.
The Energy Monster MA, Inc.
4.2(
14
)
Home Energy Audit

Serving Lancaster, MA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"These guys were fantastic! Mike really knows his heat pumps and it showsâ he was always available via email when I had a question, he walked us through the entire process for applying for the state heat pump rebates, and we couldnâ t be happier with the system one year in. Because of our Initial positive experience with Mike, we also hired Energy Monster to do our solar panel installation. Top notch, LOCAL company!"
Mitsubishi Ductless Mini Splits
Holland, MA (5.3KW)
Marlboro,MA (7.8KW)
Energy Audits in MA
Response time2 days
Recommended by100%of homeowners
SunReign - No-Cost Solar Installations
5.0(
5
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, MA and surrounding areas

In business since 2020

Free estimates

Emergency services offered

Ask us about our No-Cost Power Purchase Agreement Solar Installations. Full Service Solar Installation/repair and Roofing Repair/Replacement Pro. Sunrun where we revolutionize the solar industry with an innovative business model by providing solar as service. \nFor qualified homeowners, Sunrun may provide all solar equipment and electrical upgrades including installation, monitoring and maintenance, at no cost. \nWe also provide free evaluation and digital custom design.\n\nBook a free consultation with me today!\n\nhttps://www.facebook.com/SunReign-102844865174572/\n\nhttps://app.repcard.com/dinodibenedetto

Zero cost savings
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+2

Recommended by100%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

Not all homes are suited for solar panel systems. Older roofs or those in poor condition may need repairs or replacement before solar panels can be installed. Some other factors to consider are the amount of sunlight your roof receives, the roof’s orientation and pitch, and any shading from nearby trees or buildings.

While many states require all new construction to undergo blower door tests, it’s not a requirement for existing homes. But in both cases, a blower test helps confirm that the contractor has sealed the exterior, that the type of ductwork installed is functioning properly, and that your home is as efficient as possible.

Yes, installing an attic fan can help lower your electric bill—particularly if you live in a hot and humid region. By replacing hot and stuffy air with cooler air, these fans help regulate the temperature in your attic and the rest of your home, taking some of the pressure off of your air conditioner.

Replacing a window frame will improve your home’s energy efficiency if the old frame is cracked or damaged in a way that allows unconditioned air from the outside into your living space or if you upgrade to a more energy-efficient window frame material. Aluminum is the least energy-efficient window frame material, followed by vinyl and wood. Fiberglass and composite frames are the most energy-efficient.

Provide utility bills and clear access to all areas of the home, including the attic and basement.

The Lancaster, MA homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.