There are options available to help you finance your energy upgrades.

Mass Save HEAT

The Mass Save HEAT Loan by NSTAR, in collaboration with the state and other utilities, offers a no-interest loan program for both owner-occupied and non-owner-occupied buildings with 1-4 units. Condominium complexes, 5+ unit apartment complexes, and commercial and industrial businesses are now eligible for a HEAT Loan through the NSTAR Commercial and Industrial Loans and 5+ multi-family program. For more information please call 800-594-7277 or visit the Mass Save 5+ Multifamily website.
Eligible CustomerLoan TypeLoan AmountLoan Term
Owner OccupiedMicro Loan$500 - $2,00024 Months
Owner Occupied1-4 Unit Standard Loan$2,001 - $25,000Up to 84 Months
Non-owner Occupied1-4 Unit Rental Property Loan$5,000 - $25,000Up to 84 Months
Maximum loan amounts can vary by participating lender.

To apply for the loan, the applicant must obtain a Mass Save Home Energy Assessment. To sign up for an assessment, please visit the Energy Assessment sign-up page.

Participating HEAT Loan lenders in Cambridge partnering with MassSave include this list.

Solar Loan

Check out the Massachusetts Clean Energy Center to learn more about their solar loan options. Mass Solar Loan allow homeowners to get low-interest loans to purchase and install solar electricity at their primary or secondary residences, including owner-occupied multi-family homes with three or fewer units. Loans may also be available for residents interested in purchasing a share in a community-shared solar project, which involves a group of people investing in a portion of a larger solar system.


Cambridge Savings Bank offers Home Equity lines of credit and secured Home Equity Loans for home improvement projects. The loan amounts are between $25,000 and $250,000.  APR begins at 5% for 60 month terms and increases to 6.25% for 240 month terms. Consumer home improvement loans are offered as well, with a $10,000 maximum for 60 or 120 months. APR ranges from 9.5% to 11% based on term length. Visit the Cambridge Savings Bank website, or stop by your local banking center for more information.

Contact Information
Website: Cambridge Savings Bank
Phone: 617-234-7250
Central Square Branch: 630 Massachusetts Avenue
Harvard Square Branch: 1374 Massachusetts Avenue
Inman Square Branch: 1378 Cambridge Street

Citizens Bank

Citizens Bank offers an unsecured Energy Efficiency Loan for low-to-moderate income homeowners or homeowners that live in moderate-income tracts. Energy Efficiency Loans are available at 3% APR for energy conservation projects up to $3,000 and 5% APR for energy conservation projects up to $10,000. Loan terms are typically 12-84 months. Residents must present a contractor evaluation for energy efficiency installations in order to qualify through the Community Reinvestment Act. Citizens Bank does not restrict the number of units in a building receiving an Energy Efficiency Loan.

Contact Information
Website: Citizens Bank
Central Square Branch: 689 Massachusetts Avenue (617-779-2700)
Harvard Square Branch: 6 JFK Street (617-868-4900)
Kendall Square Branch: 141 Portland Street (617-374-1550)


Aside from its opportunities through the MassSave HEAT Loan, East Cambridge Savings Bank also offers owners of 1-6 family owner-occupied properties unsecured Energy Efficiency Loans for projects up to $25,000. The Bank is offering these loans at special rates to qualified borrowers. Loan applicants must obtain a Mass Save Home Energy Assessment. Secured loans are also available. To apply, stop by any of the three East Cambridge Savings Bank branches located in Cambridge or visit the ECSB website.

Contact Information
Website: East Cambridge Savings Bank
Phone: 617-551-2453
Main Office: 292 Cambridge Street
Inman Square Office: 1310 Cambridge Street
Mass Ave Office: 2067 Massachusetts Avenue


The Federal Housing Administration (FHA) offers an Energy Mortgage Program to help homebuyers and homeowners finance the cost of adding energy efficiency features to a new or existing house as part of a refinancing mortgage. The mortgage loan is funded by a separate lending institution, but is insured by the U.S. Dept. of Housing and Urban Development as well as the Federal Housing Administration. This encourages lenders to make credit available to borrowers who would not otherwise qualify for conventional loans on affordable terms. The cost of the energy improvements and estimate of the energy savings must be determined by a home energy rating system (HERS) or an energy consultant. In order to qualify, applicants must meet standard FHA credit qualifications. The borrower must be able to finance an upfront (3.5%), as well as annual, premium. The property must be between 1 and 4 units.

Contact Information
Website: The FHA Resource Center
Phone: (800) CALL-FHA or (800) 225-5342