Mass Save Home Insulation Rebate

Mass Save (Eversource, National Grid)

Available Weatherization

About This Program

Covers 75% of insulation costs for all customers, or 100% for income-eligible households. Includes attic, wall, and basement insulation plus air sealing. Free home energy assessment required before installation.

Estimate assumes typical attic and wall insulation project with 75% cost coverage

Official program page checked live on 2026-06-17.

Data last verified 2026-06-09. How we verify our data.

Key Details

  • 75% of insulation costs covered (100% if income-eligible)
  • Covers attic, wall, basement insulation
  • Air sealing services included
  • Free home energy assessment required
  • No cost for income-eligible households

How to Apply

Get free help applying Visit Official Program Page Track this program

(866) 527-7283

A grant-savvy contractor in Westwood, MA can handle the paperwork, inspections, and timelines so your funding releases on schedule. Getting matched is free.

You will likely need a contractor to apply

Projects like this almost always need a licensed contractor, and many grants ask for a written estimate as part of your application. Lining up a contractor in Westwood early keeps your application moving.

Get matched with a contractor

Each program sets its own contractor rules. Check the official program page for exact requirements.

Your application paperwork

Mass Save offers this rebate to its residential customers who install the qualifying energy-efficient equipment this program covers. You apply through the utility's rebate program, usually online with your account, your paid invoice, and the equipment's model or efficiency rating. Many rebates are submitted by a participating contractor and paid after the equipment is installed, so confirm the current rebate and rules on the official page first.

Steps to apply

  1. Confirm you are a Mass Save residential customer and your project uses equipment that meets the program's efficiency requirements.
  2. Check the official rebate page for the current rebate amount, eligible equipment, and whether a participating contractor is required.
  3. Buy and install the qualifying equipment (keep the itemized paid invoice and the equipment model or AHRI / ENERGY STAR information).
  4. Submit the rebate application online within the program's deadline (often the contractor submits it for you), then receive the rebate after approval.
Get the official form

Documents you will likely need

  • Your Mass Save account information.
  • The itemized paid invoice or receipt for the equipment and installation.
  • The equipment's model number and efficiency rating (AHRI certificate or ENERGY STAR label).
  • Proof of the installation date.
Download this checklist (PDF)

Requirements vary by program and locality. Confirm the exact rules on the official program page. We can help you prepare your paperwork, but you submit it yourself.

Deadline: Rolling basis

Questions about this program?

Ask us. It is free, and a real person answers within a business day.

Email us about this program

Need a Contractor for This Grant?

Grant-approved contractors understand the documentation, inspections, and timelines, so your funding releases on schedule.

Get matched with a pro, free Browse Westwood, MA contractors

Find More Programs in Westwood, MA

This is just one of many grants, rebates, and free programs available. Stack them together to maximize your savings.

See All Programs