What insulation rebates pay in Lowell
We re-read MassCEC's weatherization page on October 3, 2026. Mass Save's own site blocks our checks, so its assessment page comes from a July 3, 2026 snapshot. These are statewide Mass Save offers for Mass Save utility customers.
Home Energy Assessment
In person or virtual. It is the door to every Mass Save insulation offer.
Insulation and air sealing
The standard Mass Save discount on insulation, air sealing and weather stripping.
Income-qualified or whole 1-4 unit building
For households that qualify by income, or a 1-4 unit building where all the owners agree to weatherize together.
Single-pane to triple-pane windows
Listed with the weatherization offers on MassCEC's page.
Mass Save HEAT Loan
Terms up to 7 years, for your share of the cost.
Energy Saver Home Loan
At up to 2% for up to 20 years, for income-qualified households.
Working it out
MassCEC's example for a 2,000 square foot home: $4,000 of insulation and air sealing before incentives, $1,000 after the 75% Mass Save discount. If the household qualifies by income, or the home is in a 1-4 unit building where every owner joins in, the cost can drop to zero. The 0% HEAT Loan can spread the rest over up to 7 years.
Lowell housing and climate
The US Census Bureau's survey (2020 to 2024) counts 44,850 homes in Lowell. About 75% were built before 1980 and 44% before 1940. Some 30% are single-family detached and 27% are in two- to four-unit buildings. About 43% of households own.
Lowell's average January low is about -6°C, and the coldest reading in ten years was -26.6°C. The colder it is outside, the faster an uninsulated attic loses heat, so the savings from insulation are bigger here than on the coast.
Insulate, then heat pump
If you are thinking about a heat pump, do the insulation first. Mass Save's whole-home heat pump rebate asks for a home that is insulated well enough, and a tighter house needs a smaller system.
How the Mass Save insulation offer works
You don't apply for an insulation rebate on your own. You book a free Home Energy Assessment with Mass Save, by phone at 866-527-7283 or online. An energy specialist looks at your attic, walls and basement, and recommends work. If you go ahead, a Mass Save contractor does it, and the discount comes off the bill. You don't pay full price and wait for a cheque.
Renters and landlords can book an assessment too. A renter can get the visit, but the owner signs off on insulation. Mass Save also has a separate track for buildings with five or more units.
Top-rated installers in Lowell
Ranked by Google reviews (minimum five). We don't take referral fees or paid placements. Mass Save's discount applies when the work goes through a Mass Save assessment and contractor, so confirm that with any company before you sign.
How to get insulation rebates in Lowell
- Book a free Mass Save Home Energy Assessment online or at 866-527-7283.
- If you might qualify by income, say so when you book. It can raise the discount to 100%.
- If you own a unit in a 1-4 unit building, ask the other owners to join. Doing the whole building together can also reach 100%.
- Let the energy specialist recommend the work, then pick a Mass Save contractor.
- Pay your share after the discount, or use the 0% HEAT Loan.
Common questions
How much does Mass Save pay for insulation in Lowell?
75% off insulation, air sealing and weather stripping as standard. Up to 100% for income-qualified households or 1-4 unit buildings where all owners agree to one project.
Is insulation worth it in Lowell?
Yes for most older homes. With Mass Save paying 75% or more, your share is small, and Lowell's cold winters make the savings larger.
Is the Mass Save home energy assessment really free?
Yes. Mass Save offers a no-cost assessment in person or by video, plus a no-cost online assessment.
Can renters get Mass Save insulation?
Renters can book the free assessment. The building owner has to agree to any insulation work.
Does Mass Save help with windows?
Only in one case on MassCEC's list: $75 per window for replacing single-pane windows with triple-pane windows. Insulation and air sealing get the larger discount.
What to do next
Book the free assessment first. Then read about Lowell heat pump rebates, since insulation unlocks the whole-home rate, or see the full list of Mass Save rebates.
By Sam Menard. Sources, last read October 3, 2026: MassCEC: Weatherization (Mass Save discounts and loans), Mass Save: Home Energy Assessments (snapshot July 3, 2026), MassCEC: Air-source heat pumps (loan terms), US Census Bureau ACS 5-year 2020-2024, table B25034 (year built). All Lowell rebates → Every Mass Save rebate →