Below are lists of participating independent Mass Save insulation contractors. The lists are currently available by utility or energy efficiency service provider and heating fuel type for residential weatherization projects in 1 - 4 family homes. If your utility or energy efficiency service provider is not listed* yet, check back or call 1-866-527-7283 and a Mass Save representative will assist you.
*Additional and updated lists are added periodically on this page.
For NSTAR Gas Heating and National Grid Gas Heating customers only:
There are several convenient paths to arrange for weatherization contractor services and a comprehensive Home Energy Assessment that provide eligibility for a generous array of energy efficiency and weatherization incentives.
One path is to call an independent Mass Save weatherization contractor from the list below, prior to receiving a Home Assessment, and schedule a home visit to discuss your weatherization needs. During the visit the contractor can guide you through the process of arranging a follow-up comprehensive Home Energy Assessment which is required for eligibility to receive Mass Save weatherization incentives.
Another path is simply to call and schedule a Home Energy Assessment first. During this call a Mass Save representative can walk you through the process of arranging a Home Assessment and turn-key weatherization upgrade services. If you are interested in weatherization services from an independent Mass Save contractor, the representative can provide you a list of participating contractors during this initial call. You may also choose to have a list provided at the time of the Home Assessment or you can just download the current NSTAR Gas and National Grid Gas lists below to start the process now.
Participating Insulation Contractors for National Grid Gas Customers
Participating Insulation Contractors for NSTAR Gas Customers
For Berkshire Gas, Cape Light Compact, Columbia Gas of Massachusetts, New England Gas Company and Unitil customers:
To learn more about Berkshire Gas, Cape Light Compact, Columbia Gas, Unitil and New England Gas Company weatherization contracting and Home Energy Assessment services, simply call 1-866-527-7283 and a Mass Save representative will assist you. You may also refer to the links below to see a list of participating Mass Save insulation contractors.
Participating Insulation Contractors for Berkshire Gas Company
Participating Insulation Contractors for Columbia Gas of Massachusetts
Participating Insulation Contractors for Cape Light Compact
Participating Insulation Contractors for New England Gas Company
Participating Insulation Contractors for Unitil