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Conserve Energy.
Improve Comfort.
Save Money.

Schedule a no-cost Home Energy Assessment to begin saving on your energy costs.

Conserve Energy.
Improve Comfort.
Save Money.

Schedule a no-cost Home Energy Assessment to begin saving on your energy costs.


The Mass Save Program is funded by the energy
efficiency charge on all customers’ gas and electric bills.
Recover your money with the below incentives:

75% off insulation work
No-cost air sealing and weatherization work
0% Financing opportunities on energy efficiency upgrades
Rebates and incentives on heating and cooling equipment
Top Rated Mass Save Contractor

The Mission

Our mission is simple: to help our customers CONSERVE ENERGY. IMPROVE COMFORT. SAVE MONEY. We are committed to providing affordable home energy services that create a more comfortable and energy-efficient home while helping to reduce energy costs. We take pride in the long-term relationships we have built with our customers and set ourselves apart by offering the highest quality of work combined with unparalleled customer service.

Proud to be a Mass Save Partner

As a participating Independent Installation Contractor in the Mass Save Program we perform air sealing, weatherization, and insulation improvements to residential and commercial properties. We work with homeowners and businesses on every step of their project: from setting up the energy assessment to helping them qualify for rebates and incentives to complete the installation. Every step is completed with our customer’s satisfaction is our team’s number one priority!

What is the Mass Save program?

The Mass Save Program is an initiative sponsored by Massachusetts’ natural gas and electric utilities and energy efficiency service providers. The Mass Save program promotes energy efficiency through its wide range of services, rebates and incentives, training, and information. Funds for the program come from a charge on the customer’s utility bill. If you’re already paying into the program, you may as well take advantage of its benefits!

What We Do

If you experience uncomfortable temperatures throughout your home or expensive heating and cooling costs, we can help! We specialize in home energy efficiency and our services include Home Energy Assessments, air sealing, insulation, moisture control and ventilation, and mini split heating and cooling installations.
We work hard to stay up to date with the latest energy efficiency trends and technologies so that we can provide you with the very best service. You will have peace of mind knowing that we are fulling licensed, insured, and that all members of our team have completed a background check and drug screen.

Home Energy Assessments
We offer a no-cost Home Energy Assessment to properly identify problem areas throughout your home. Once identified, our knowledgeable energy consultants will provide you with recommendations, and will help you develop a plan to make your home more energy efficient, comfortable, and healthier.
Air Sealing
Before we insulate your home, it is very important to seal up any drafts by properly air sealing your attic, basement or crawl space, and living areas. Reducing the amount of air leakage in your home is a cost-effective way to cut heating and cooling costs, improve the longevity of your home, and create a more comfortable and healthier living space for you and your family.
Once your home has been properly air sealed, the next step is to add insulation. We use a wide range of insulation materials such as cellulose, fiberglass batts, and polyiso rigid foam board to properly insulate your home. Our customized solutions are sure to make your home more comfortable for every season!
Mini Split Heating and Cooling
Ductless mini-split systems or “mini splits” have become increasingly popular over the past decade due to their outstanding efficiency ratings and numerous applications in both residential and commercial buildings. Mini-splits are ideal for heating and cooling open rooms and spaces where ductwork cannot be installed. They are extremely easy to install and are very energy efficient.

Offering services throughout Massachusetts

We provide service to all cities and towns within Hampden, Hampshire, Franklin, Berkshire, and Worcester county.

Green Collar is great, I worked with Brian throughout a large project on an investment property in Amherst. We hit some unexpected bumps and they worked through them with grace and even accommodated my being out of town the week the work was scheduled. I already have 2 more jobs lined up with them! Great to work with, excellent communication, and delivered on their promises, tough to find these days. Thanks GC!
Alan H
via Google
The guys from Green collar were very prompt, professional and efficient. They got right to work and we were very happy with the results.
Amy Y
via Better Business Bureau
Rob and his staff at Green Collar are exceptional! Courteous, professional and responsible. During our contract work, there was minor damage and without hesitation Dylan, Cecile and Rob all gave this situation their utmost attention. I would recommend this company to anyone who is having contractual work done from an energy audit, without hesitation.
Ann Marie M
via Google
This company was professional, extremely hard working, and helpful every step of the way. I would highly recommend them for any job you may have in your home.
Aubrey G
via Better Business Bureau
Green Collar did an incredible job of, as I’ve grown fond of calling it, “fluffing up my home.” 14” of cellulose over every part of the attic they could access, pink panther damming up the rest, expandafoam sealing in double-reflective foam board… this has resulted in a literal halving of my utility bill, combined with a new high-efficiency furnace, and an additional level of comfort upstairs that just can’t be measured. If you have the chance to choose your Mass Save contractor, definitely go with Green Collar… they found opportunities to save money that resulted in my project total being less than half of what was originally projected!
Ben Kronlund
via Facebook

Schedule a no-cost Home Energy Assessment to begin saving on your energy costs using our scheduling form.

Alternatively, you’re welcome to schedule by calling our office: 413-532-1817