Custom Building Insulation & Weatherization Incentives

Incentives for Buildings 20,000 - 100,000 Square Feet.

Back to Building Insulation & Weatherization

Insulation and air sealing work hand in hand to make your building more energy efficient and comfortable.

For buildings over 20,000 square feet and below 100,000 square feet, the Sponsors of Mass Save offer custom incentives for upgrades, like:

Adding thermal insulation to existing exterior walls and roofs/attics
Adding weatherstripping around exterior doors and windows
Making air sealing improvements to exterior walls and roofs

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.

Contact your Program Sponsor
Before starting the application process, check with your Mass Save Sponsor to determine eligibility of the proposed project and to establish requirements for savings projections and cost estimates.
Complete the C&I Weatherization Calculator and Application

Enter general information about the building(s) receiving weatherization upgrades and details about the energy-saving measures being made. These inputs are required for the tool to calculate your estimated savings properly. You will be required to provide your Mass Save Sponsor photos of the pre-installation conditions and cut sheets for the weatherization to be installed.

Submit the application and tool to your Sponsor for pre-approval.
- Complete C&I Weatherization Calculator
- Download & Email Custom Project Application
Project Approval
After a successful review, the Sponsor will notify you in writing of the project approval and incentive amount. You must adhere to the Terms and Conditions in order to receive the final incentive payment.

For a full list of eligibility requirements, please reference the custom project application.

Before starting the application process, check with your Mass Save Sponsor to determine eligibility of the proposed project and to establish requirements for savings projections and cost estimates. Use the Find Your Sponsor tool for contact information.
Facilities undertaking weatherization improvements must be over 20,000 square feet and below 100,000 square feet.
The custom weatherization tool should not be used for the following buildings:
- Ventilation load driven buildings (e.g. do not use for buildings with fume hoods, large ovens, grills, or large heat generating sources like labs or restaurants)
- Buildings over 100,000 square feet
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 Administrator.
Weatherization measures that have already received a rebate or incentive from a Mass Save Sponsor are not eligible.
New construction projects are not eligible for this weatherization rebate.

Project installation may be subject to an onsite verification.

Related Rebates & Incentives

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.

Case Study: Hydroid, Inc.

Hydroid, a field-proven technology leader in advanced marine robotics and autonomous underwater vehicles, saved energy and reduced greenhouse gas emissions with high-performance building envelope upgrades and other high-efficiency equipment measures.

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