Massachusetts Insulation Rebates
Mass Save may cover 75–100% of insulation costs for eligible Massachusetts homes. Here's what's covered, how to access it, and why insulation often comes before a heat pump.
What insulation rebates are available in Massachusetts?
The primary insulation rebate available to Massachusetts homeowners is through Mass Save, administered by your electric utility (Eversource, National Grid, Unitil, Cape Light Compact). Mass Save typically covers 75% to 100% of the cost of attic insulation, basement and crawlspace insulation, wall insulation, air sealing, and related weatherization work. The exact coverage depends on your utility, home type, income band, and the results of a no-cost Home Energy Assessment. A federal 25C tax credit (30%, up to $1,200/year for insulation and air sealing) can generally be stacked on top.
Insulation rebate rules, coverage tiers, and eligibility requirements vary by utility and change over time. Always verify current program details with your utility before assuming eligibility.
How much does Mass Save cover for insulation?
Mass Save typically covers 75% to 100%of insulation costs for eligible Massachusetts homeowners, depending on your utility, home type, and income band. A no-cost Home Energy Assessment is required first to identify what's needed and unlock the rebate. Insulation and air sealing are often done together and may significantly reduce heating and cooling costs.
What insulation types are covered?
Insulate before you install a heat pump
A well-insulated home requires a smaller, less expensive heat pump system — saving money on both the equipment and the rebate application. Insulation is often covered at 75–100% through Mass Save, making it one of the highest-ROI first steps a Massachusetts homeowner can take.
How to access insulation rebates
Can I use my own contractor for Mass Save insulation work?
No. To receive the Mass Save insulation rebate, work must be performed by a Mass Save–approved participating contractor. You cannot hire a contractor of your own choosing and apply for the rebate after the fact. After your no-cost Home Energy Assessment, the assessor will provide a referral list of approved contractors in your area. You can also search for participating contractors on the Mass Save website by zip code.
The federal 25C tax credit (30%, up to $1,200/year for insulation and air sealing) does not require a Mass Save–approved contractor — that credit applies to any qualifying insulation work, regardless of program participation.
Not a government website. Not affiliated with Mass Save, any Massachusetts utility, the IRS, or any state agency. Rebate program rules, tiers, and amounts change without notice — always verify current eligibility with your utility or the Mass Save website before treating any estimate as confirmed.