Building Insulation & Weatherization Incentives

Incentives for buildings under 8,000 square feet.
Building Insulation and Weatherization Incentives Hero
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, basements, and walls, and seal air leakage in attics.

Need to remove asbestos, vermiculite or knob and tube wiring to complete weatherization? Find out how the Sponsors of Mass Save can help with rebates for barrier mitigation.

Insulation Rebates
Insulation Type Rebate Amount
Attic Insulation $0.10 per R-value added per square foot
Wall Insulation $0.16 per R-value added per square foot
Basement Insulation $0.17 per R-value added per square foot

Air Sealing Rebates
Air Sealing Rebate Amount
Attic Air Sealing $115 per hour of air sealing work
(proportional to attic size, see application for details)
Exterior Door Weatherstripping $11 per linear foot of door weatherstripping

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.


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, 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, 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 knee-wall insulation), exterior wall insulation, basement insulation, and exterior door weatherstripping.
  • Basement insulation incentives are limited to the following categories: above-grade walls, crawlspaces, and rim joists. All moisture issues must be resolved before insulating basement walls.
  • 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. 

Related Rebates & Incentives

Gallo Ice Arena

Case Study: Gallo Ice Arena

With energy upgrades, including a tighter building envelope, the Gallo Ice Arena saved an estimated $34,694 in annual energy costs. In addition to energy savings, upgrades improved the ice surface, expanded skating opportunities, and improved rink aesthetics.

Sacred Heart Case Study Image

Case Study: Sacred Heart Church

Sacred Heart Church, one of the pillars of the Lawrence, MA community, took weatherization measures to insulate the Gothic church's attic, not only resulting in greater comfort for the parishioners, but also in energy savings of $4,300 annually.

An energy efficient auto body shop in Massachusetts

Medeiros Auto Body

Medeiros Auto Body, a small minority-owned business, performed a no-cost energy assessment and installed measures that reduced the gas usage by more than 20% annually, utilizing $9,320 in incentives from Liberty.

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