Building Insulation & Weatherization Incentives

Incentives for buildings under 8,000 square feet.
Building Insulation and Weatherization Incentives Hero
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Insulation and air sealing work hand in hand to make your building more energy efficient and comfortable.

By adding more insulation to your building or sealing drafty air leaks, you can greatly reduce heat loss and save energy in your building.

For buildings under 8,000 square feet, the Sponsors of Mass Save offer incentives to upgrade insulation in attics and walls, and seal air leakage in attics.

man spraying insulation
Download & Email Rebate Form Submit Rebate Online
Insulation Type Rebate Amount
Attic Insulation $0.08 per R-value added per square foot
Wall Insulation $0.12 per R-value added per square foot

Air Sealing Rebate Amount
Attic Air Sealing $88 per hour of air sealing work
(proportional to attic size, see application for details)

Participate in a No-Cost Energy Assessment
Contact your Mass Save Sponsor to schedule a no-cost energy assessment before installation. A qualified vendor will contact you to determine existing conditions at your facility and identify potential energy-saving measures during an in-person  or virtual assessment. Recommended improvements will be installed by a vendor qualified by the Sponsors of Mass Save.

 OR

Apply for Weatherization Rebates

Work with a licensed weatherization contractor to discuss your weatherization project and determine rebate eligibility. Upon completion of installation, apply for a rebate by submitting all required documentation by email to your Mass Save Sponsor.

For customers of Berkshire Gas, Cape Light Compact, Liberty Utilities, or Unitil, notification and approval of the project is required prior to installation.

Can’t find what you’re looking for? The Sponsors of Mass Save offer customized project support to help your business save energy and money and reduce greenhouse gas emissions.

For a full list of eligibility requirements, please reference the rebate form.

  • Facilities undertaking weatherization improvements must be 8,000 square feet or less.
  • Offers valid only for commercial & industrial customers in Massachusetts where Berkshire Gas, Cape Light Compact, Eversource, Liberty Utilities, National Grid, or Unitil are the electric or gas Program Sponsor.
    • For customers of Berkshire Gas, Cape Light Compact, Liberty Utilities, or Unitil territories, notification of project prior to installation is required. Please use the Find Your Sponsor tool for contact information.
  • Weatherization measures that have already received a rebate or incentive from a Mass Save Sponsor are not eligible.
  • Weatherization measures are limited to attic air sealing, attic insulation (including attic kneewall insulation), and exterior wall insulation. Basement insulation and air sealing are not eligible for prescriptive rebates but may be eligible for custom incentives.
  • Mass Save Sponsors, at its discretion, may exclude projects in facilities with heating and cooling loads that are highly driven by ventilation requirements such as those incurred by food service or laboratory settings.
  • New construction projects are not eligible for this weatherization rebate.

Project installation may be subject to an onsite verification. See Terms & Conditions for full requirements. 

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Not Sure Where To Start?

If you’re looking for advice on how to save energy, the Sponsors of Mass Save offer energy assessments and guidance to support efficiency projects from start to finish.

Learn More