Renovations & Additions

Build energy efficiency into your renovation or addition to drive comfort and savings.
A group of people discussing renovation plans
Get start-to-finish support from a certified HERS rater to help you optimize design, select efficient technologies, and access incentives for your renovation or addition.

The Sponsors of Mass Save provide incentives for incorporating energy-efficient upgrades to renovations or additions of existing homes in Massachusetts. Eligible upgrades may include, but are not limited to:

  • Insulation
  • Heating, ventilation, and air conditioning
  • Water heating equipment
  • Air and duct sealing
  1. Confirm Eligibility

    View the Eligibility Tab to confirm the eligibility requirements.

  2. Fill Out Interest Form

    Get started by submitting an Interest Form. Within a few days, a Sponsor representative will contact you to proceed.

    If you have any questions, please call 1-866-527-SAVE (7283) or email [email protected].

  3. Schedule Preliminary Home Visit

    Contact an approved certified Home Energy Rating System (HERS) Rater at the start of your project. During a preliminary site visit, the Rater will review your plans, estimate possible energy savings, and may recommend additional energy efficiency upgrades. These visits take about one to two hours.

  4. Receive Energy Report

    Customers typically receive an estimate of savings and available incentive amounts after the preliminary site visit.

    If you are installing new insulation, contact your Rater to schedule an insulation inspection, or to receive instructions on how to complete a remote inspection.

    The insulation inspection should take place once the insulation work is complete but before wallboard has gone up.

  5. Schedule Final Inspection

    As your project nears completion, set up a final site visit with your Rater. They will finalize all the details and perform diagnostic testing as needed.

  6. Receive Incentives

    After the final inspection, you will receive an incentive completion notification and a post-participation survey via email. Within 10 to 12 weeks of your final inspection, you will receive an incentive check in the mail.

    Learn more about how residential renovations and additions incentives are calculated.

    Have questions? View our list of Frequently Asked Questions.

Residential renovations and additions to single- and multi-family homes with three stories or less may be eligible if:

  • They are located within Sponsor service territories
  • Renovations are extensive and consist of 50% or more of the original home undergoing renovation. Additions must meet a minimum of 500 square feet total floor area.
  • A Sponsor of Mass Save-approved certified Home Energy Rating System (HERS) Rater conducts a preliminary site visit at your home prior to the start of construction or demolition
  • Incentives for renovation and addition projects are only available through the Residential New Construction program 
  • Customers are not eligible for individual equipment rebates through the Mass Save Heating & Cooling programs, with the exception of air source and ground source heat pump rebates for equipment installed in the existing portion of the renovated home

The Sponsors of Mass Save offer 0% financing HEAT Loans to make energy efficiency upgrades more affordable to Massachusetts residents. Through this loan, you could qualify for a loan up to $50,000 toward qualified home improvements.

Highland Street Case Study Image

Case Study: Highland Street

Located in historic Weston, this home blends an 1897 look with modern amenities and innovative efficiency measures. The Sponsors of Mass Save provided $10,000 in incentives to cover the cost of energy upgrades—like air source heat pumps, lighting, and hot water equipment.