Massachusetts Mass Save Insulation Rebate

Rebate Details

Provider: Mass Save
Amount: 75-100% off approved insulation costs
Insulation Types: Attic, Walls, Floor/Basement, Whole-Home, Other
Utility Company: Participating sponsors including Eversource, National Grid, Unitil, Berkshire Gas, Liberty Utilities, Cape Light Compact
Service Area: Statewide in Massachusetts for customers of participating electric and gas utilities
Available in: Massachusetts

The Massachusetts Mass Save Insulation Rebate provides generous discounts on insulation and air sealing upgrades, making it easier and more affordable to improve your home’s energy efficiency.

Overview

Mass Save is a collaborative program sponsored by major Massachusetts utilities (like Eversource, National Grid, and others). It offers 75-100% off approved insulation and air sealing for homes with 1-4 units.

  • Covers key areas like attics, walls, basements, rim joists, and floors.
  • Includes no-cost air sealing in many cases.
  • Available statewide in MA for eligible utility customers.
  • No fixed expiration – program is ongoing but check for annual updates.

How It Helps You

Insulation upgrades are one of the smartest investments for Massachusetts homeowners – especially with cold winters and rising energy costs.

  • Save on bills: Reduce heating/cooling costs by up to 15% (or more when combined with air sealing).
  • Boost comfort: Eliminate drafts, even out temperatures, and reduce issues like ice dams.
  • Stack incentives: Combine with federal Energy Efficient Home Improvement Credit (if eligible before end-2025) or Mass Save heat pump rebates.
  • Environmental impact: Lower your home’s energy use and carbon footprint.

Pros: Major upfront savings (often 75%+ off), quick payback, improved home value. Cons: Requires a Home Energy Assessment first; some paperwork for rebates.

Eligibility and Application

  • Who qualifies: Homeowners/renters in 1-4 unit homes served by participating utilities. Income-eligible households get 100% no-cost upgrades.
  • Requirements: Home must need insulation (determined via assessment); upgrades by approved contractors.
  • Step-by-step process:
    1. Schedule a no-cost Home Energy Assessment at masssave.com or call 866-527-SAVE (7283).
    2. An energy specialist inspects your home and recommends insulation/air sealing.
    3. Hire a Mass Save-approved contractor to complete the work.
    4. Rebates/discounts applied directly (often at point-of-sale or post-install).

For income-eligible (e.g., household income limits like ≤$51,777 for 1 person in 2025-2026), upgrades can be fully covered.

Real-World Examples

  • A typical MA homeowner adds attic and wall insulation costing $4,000. With 75% off, they pay only $1,000 – plus save $400-600/year on heating bills for fast payback.
  • An income-eligible family in Boston gets full attic, basement, and air sealing upgrades at no cost, cutting winter bills significantly while enjoying a warmer, draft-free home.

FAQs

How do I apply?

Start with a free Home Energy Assessment via MassSave.com or phone.

Can this be combined with other incentives?

Yes – stack with federal tax credits (up to $1,200 for insulation if claimed timely) or heat pump rebates.

What if I don’t qualify?

Most MA utility customers qualify for at least 75% off; explore financing like 0% HEAT Loan if needed.

How much could I save overall?

Beyond rebates, expect 10-20% lower energy bills long-term, plus comfort gains.

Is air sealing included?

Often no-cost or bundled.

Do I need a contractor?

Yes – must use Mass Save-approved for rebates.

Ready to start saving? Check your eligibility and schedule your no-cost Home Energy Assessment today at https://www.masssave.com/residential/rebates-offers-services/insulation-and-windows/insulation-and-air-sealing. Small upgrades like this deliver big results – lower bills, a cozier home, and a greener planet!

Apply for This Rebate

Please verify all rebate information with official sources. Information updated as of February 20, 2026.