Step-by-Step Process

Your home or business is likely not as energy efficient as it can be, resulting in higher electricity and cooling costs. Weatherization rebates target tight building envelopes that will minimize heat loss, leaks, and drafts while maximizing energy efficiency and comfort. After weatherization, it can be more economic to pursue electrification technologies such as heat pumps. For guidance on how to complete a successful project, follow our step-by-step process laid out below. If you have any questions or want additional assistance getting started, contact our Sustainability Coordinator by filling out our contact form.

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Determine whether you are eligible for the HMLP or Mass Save Program

Program eligibility is based on the primary type of heating fuel used in your home or business. If you do not meet the criteria for either program, you may refer to HMLP’s heat pump program for electric heating assistance or its efficient appliance program for central A/C assistance.

HMLP’s Program Information:

HMLP is offering 50% of the project cost up to $1,000 for weatherization. Eligible measures such as insulation or air-sealing are determined by an ENE energy assessment and have a payback of less than 10 years. Customers must meet all of HMLP’s requirements to be eligible for the rebate.

Insulation: Attic, wall, floor, or crawlspace and rim joist insulation

Air sealing: Weather stripping, caulking, and interior storm windows

Notes: If a project is self-completed, save all receipts for materials associated with the installation. A dollar value for self-labor is not rebate eligible. New construction is not rebate eligible, including additions on existing homes. 

Mass Save Program Information:

Mass Save is offering 75% to 100% off insulation, plus no-cost air-sealing of leaks in drafty areas of the home. There are additional incentives available, including $75 each for triple-pane EnergyStar certified windows and 0% financing through the HEAT loan. Customers must meet Mass Save’s requirements to be eligible for the rebate.

Note: HMLP is not responsible for the management or administration of the Mass Save program. Resources have been shared based on publicly available information that is subject to change at any time. It is the consumer’s responsibility to verify any and all Mass Save program information with an official Mass Save representative.

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Schedule a No-Cost Energy Assessment

An ENE energy assessment must be completed before the project and dated within two years of the job date in order to be eligible for the rebate. HMLP uses Energy New England’s (ENE) assessment services to provide customers with expert advice on energy efficiency improvements. ENE’s highly trained and experienced Energy Advisors can assess your building’s energy efficiency to identify heating, lighting, and weatherization opportunities that can save money on utility bills. Qualified weatherization projects are those that are listed in the ENE energy assessment. If you have questions about the assessment process or need assistance, please contact or call 888-772-4242. 

Note: If natural gas is your primary heating fuel, sign up for a Mass Save energy assessment.

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Find a Contractor or DIY Resources

HMLP does not manage or maintain a contractor list for weatherization. However, customers can utilize Mass Save’s contractor list at their own discretion. Not all contractors on Mass Save’s list will necessarily work outside of Mass Save’s program. Also, using a contractor on this list is not required for rebate eligibility. Work completed by any contractor is eligible for a rebate so long as the project itself is qualified on the energy assessment and meets all of HMLP’s other eligibility requirements. Customers can also use the EnergyStar DIY Guide to Sealing and Insulating if interested in self-completing a project.

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Complete the project and submit a rebate application

Once the weatherization project is completed, submit a rebate application to HMLP! You will receive a confirmation email once the application is submitted successfully. Purchases and rebate applications must be submitted by 12/31 of the current calendar year. The rebate will be issued by check pending approval. For more information, please contact Energy New England, HMLP’s Program Administrator, at or call 888-772-4242.