Thinking about adding insulation or replacing your old windows?

SELCO is now offering 0% interest energy conservation loans for owner-occupied homes or condominiums. These loans are available for installation of energy efficient replacement windows or additional insulation.


Residents must contact NextZero for a free home energy audit (1-888-333-7525) and submit a loan application for pre-approval before the start of any work.

Energy Conservation Loans


Eligible Improvements
  • Windows & Doors

  • Insulation

Loan Amounts (max. repayment period 60 months)
  • Windows &  Doors - up to $3,500

  • Added Insulation - up to $3,500

  • Minimum / Maximum loan amounts - $1,000 / $3,500

Loan Application Process
  1. Customers apply for the 0% interest loan program must first have a free home energy audit. An appointment with our auditors can be made by calling NextZero at 1-888-333-7525.

  2. Based upon the audit recommendations and the customer's desire to make the improvements, the customer should get a cost estimate for the proposed work. the customer may do the work him/herself, in this case the materials only are covered by the loan. If a contractor is hired, both labor and material costs are covered.

  3. The SELCO Energy Conservation Loan Application must be completed online using the Shrewsbury Online Services Storefront at

  4. SELCO will review the application and notify the customer of approval or denial. In the case where a loan application is denied, a reason will be given.

  5. After receiving loan approval, the customer may proceed with implementing the approved efficiency upgrades.

  6. Following project completion, the customer must again call the NextZero program at 1-888-333-7525 to schedule a post-installation inspection with SELCO's energy auditor.

  7. Once the customer has received the post-installation inspection report from NextZero, they should submit a copy of the report and all receipts/invoices for loan-eligible expenses to their active loan request using the Shrewsbury Online Services Storefront.

  8. The SELCO Energy Conservation Loan Contract will be sent to the customer through the Shrewsbury Online Services Storefront. The customer should print two copies of the contract to be notarized. Once the Loan Contract has been signed and notarized, the customer must mail both copies to SELCO Energy Conservation Loans at 100 Maple Ave., Shrewsbury, MA 01545.

  9. SELCO will issue a check for payment and will begin billing the customer for the amount due in equal amounts for the loan repayment period selected by the customer during the application process. A one-time administrative fee of $50 will be billed along with the first loan installment.