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Windows & Doors · Groton, MA

Windows & Doors in Groton, Massachusetts

What applies to this work in Groton, Middlesex County: Mass Save, rebates and financing, and the permit. Then the contractors serving the town.

30 contractors serving Groton, including 1 based in town.

Is Groton in Mass Save?

It depends on the address. Part of Groton gets its electricity from National Grid and part from the Groton Electric Light Department (the state's list names both), and Mass Save follows the company that sends the electric bill: a home on National Grid's service is in the Mass Save program, and a home on the light plant's service is outside Mass Save's electric program. A home on the light plant's service can still use Mass Save through a National Grid gas account.

To check, look at the company name on your electric bill, or ask the light plant whether it serves your street.

Groton is on the state's list of municipal light plants; Mass Save in municipal light plant towns has the full decision tree.

Window rebates and financing in Groton

For a home on National Grid's electric service, mass Save pays $75 per window in 2026, and only when ENERGY STAR Most Efficient windows replace single-pane windows after you complete the weatherization recommendations from a Home Energy Assessment.

Replacing double-pane windows earns no rebate. The 0% HEAT Loan can finance ENERGY STAR replacement windows, but only alongside completed weatherization recommendations.

On the light plant's service, the Mass Save window rebate goes through a National Grid gas account; a home with no such account uses the light plant's own programs.

Do you need a permit for replacement windows or doors in Groton?

Plan on one. Window and door replacement is not on the Massachusetts building code's list of permit-exempt work, and the Groton Building Department decides whether a same-size swap counts as an ordinary repair. 39% of Groton's homes were built before 1980 (Census ACS 2018-2022), and work that disturbs paint in a home built before 1978 has to follow the lead-safe renovation rules.

permits.llc carries the rules: its Massachusetts guide to the permit for replacement windows or doors and the Groton Building Department page, with the department's contact and portal. For a sense of volume, permits.llc counts 18 building permits filed in Groton in October 2025 through September 2026 (its count).

Contractors serving Groton

Claimed listings within 5 miles come first, then the rest by rating, then distance. Google ratings as of October 2026. How we list and rank contractors

Common questions about Windows & Doors in Groton

Is Groton in Mass Save?
It depends on the address. Part of Groton gets its electricity from National Grid and part from the Groton Electric Light Department (the state's list names both), and Mass Save follows the company that sends the electric bill: a home on National Grid's service is in the Mass Save program, and a home on the light plant's service is outside Mass Save's electric program. A home on the light plant's service can still use Mass Save through a National Grid gas account.
Is there a Mass Save rebate for new windows in Groton?
For a home on National Grid's electric service, mass Save pays $75 per window in 2026, and only when ENERGY STAR Most Efficient windows replace single-pane windows after you complete the weatherization recommendations from a Home Energy Assessment. Replacing double-pane windows earns no rebate.
Can I finance replacement windows in Groton with the HEAT Loan?
Only together with weatherization. The 0% HEAT Loan covers ENERGY STAR replacement windows only alongside completed weatherization recommendations.
Do you need a permit for replacement windows or doors in Groton?
Plan on one. Window and door replacement is not on the Massachusetts building code's list of permit-exempt work, and the Groton Building Department decides whether a same-size swap counts as an ordinary repair. 39% of Groton's homes were built before 1980 (Census ACS 2018-2022), and work that disturbs paint in a home built before 1978 has to follow the lead-safe renovation rules.

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