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Waltham, MA

Mass Save heat pump rebate in Waltham

Eversource serves Waltham. Install in 2026 and Mass Save pays $2,650 per ton. From January 1, 2027 it pays $2,350.

  • Checked: November 2026
  • Mass Save rate drops: Jan 1

See my rebate

A snowy Massachusetts street of triple-deckers, colonials and Capes
ElectricEversource
GasNational Grid
Rebate programMass Save
Last day at 2026 ratesDec 31, 2026

The short answer for Waltham. If you are replacing oil, propane or electric baseboard, apply with your electric account (Eversource). If you are replacing natural gas, apply with your gas account (National Grid). The rebate is the same either way: $2,650 per ton up to $8,500 for 2026 installs, then $2,350 per ton up to $7,500 from January 1, 2027.

Waltham estimator

What could a Waltham home get back?

TownWaltham

What heats the home now?

We do not turn this into a system size. An installer measures your rooms to do that. We pass the number along with your request.

What will the heat pump do?
3 tons

Heat pumps are sized in tons. A ton is how much heating and cooling the system puts out, not what it weighs. Not sure of yours? Leave it at 3. The installer works out the real size for your home.

What Mass Save pays in Waltham: 2026 against 2027

Mass Save heat pump rebate by system size and install year
SystemInstalled 2026From Jan 1, 2027Change
2-ton whole-home$5,300$4,700-$600
3-ton whole-home$7,950$7,050-$900
3.2+ ton whole-home (cap)$8,500$7,500-$1,000
2-ton partial-home$2,250$2,000-$250
3-ton partial-home$3,375$3,000-$375

Whole-home $2,650 per ton up to $8,500 (2026), $2,350 up to $7,500 (2027). Partial-home $1,125 up to $8,500, then $1,000 up to $7,500. Source: Mass Save, Air Source Heat Pumps, checked November 6, 2026. Your size in tons: work it out from the BTU on your quote.

Which account do you apply with in Waltham?

Your heat todayApply withWaltham homes (Census)
Oil, propane or electric resistanceYour electric account (Eversource, a Mass Save electric sponsor)11,559 homes (45%): 4,830 oil, 5,993 electric, 736 propane
Natural gasYour gas account: National Grid. Mass Save's gas sponsor rule.13,624 homes (53%)

Heating-fuel counts: U.S. Census Bureau, ACS 2020-2024 5-year estimates, table B25040 (Census Reporter). The sponsor rule is Mass Save's, quoted on the heat pump page.

What qualifies a Waltham home

The median home in Waltham was built in 1961, well before Mass Save's 2000 cut-off. Most whole-home projects here will need the other weatherization test: a Home Energy Assessment recommending under $1,000 of work, or 2013-or-later recommendations completed. 50% of Waltham homes are owner-occupied.

  • Installer. Mass Save requires a contractor in its Heat Pump Installer Network.
  • Whole-home weatherization test (Mass Save): built in 2000 or later, or a Home Energy Assessment recommending under $1,000, or 2013-or-later recommendations completed.
  • Full-time winter home and one whole-home rebate per account.

Source: Mass Save eligibility. More: Waltham housing facts, income-eligible and HEAT Loan.

Permits in Waltham

Building Department

Address
Government Center, 119 School Street, Room 25, Waltham, MA 02451
Phone
781-314-3275. Wires Department: 781-314-3175.
Hours
Mon to Fri 8:30 am to 4:30 pm

Waltham permit pageOnline permits

From Waltham's own website, read November 6, 2026. Offices change hours; call first.

The December 31 timeline for Waltham

  1. 1NowGet proposalsTwo or three installers in the Mass Save network. Ask each for a firm install date.
  2. 2By Dec 31, 2026Heat pump installedThe install date sets the rate. $2,650 per ton, up to $8,500 (whole-home).
  3. 3Jan 1, 2027New rate startsInstalls on or after this date: $2,350 per ton, up to $7,500 (whole-home).
  4. 4By Feb 28, 2027Rebate form inForm and paperwork for 2026 installs must reach Mass Save. Allow about eight weeks.

The full dates for every program: the December 31 deadline guide.

Questions about heat pump rebates in Waltham

Does Waltham get Mass Save heat pump rebates?

Yes. In Waltham, electricity comes from Eversource and gas from National Grid. Both are Mass Save sponsors. Use your electric account if you are replacing oil, propane or electric resistance heat, and your gas account if you are replacing natural gas.

How much is the Mass Save heat pump rebate in Waltham in 2026?

A whole-home heat pump installed in 2026 gets $2,650 per ton, up to $8,500. A 3-ton system pays $7,950 and anything from about 3.2 tons up pays the $8,500 cap. Partial-home pays $1,125 per ton, up to $8,500.

What is the 2026 deadline for a heat pump in Waltham?

The heat pump has to be installed by December 31, 2026 to get $2,650 per ton. Mass Save must receive the rebate form and paperwork by February 28, 2027. Installs on or after January 1, 2027 get $2,350 per ton, capped at $7,500.

Do I need a permit for a heat pump in Waltham?

Waltham's Building Department handles permits. Call 781-314-3275 or see the town's permit page before work starts. The licensed contractor doing the work normally pulls the permit.

Is it worth installing a heat pump in Waltham before December 31?

For a whole-home system, installing in 2026 pays up to $1,000 more than installing in 2027 ($8,500 against $7,500 at the caps). The install date decides the rate, so ask your installer for a committed date in writing.

Who can install a heat pump in Waltham and still get the rebate?

Mass Save pays only when the system is installed by a contractor in its Heat Pump Installer Network, so check any contractor against that list before you sign. Aurion takes heat pump projects in Waltham and helps with the rebate paperwork. Licensed work is done by licensed Massachusetts technicians. Send two photos and the town to get a price.

More for Waltham

All 23 towns, rebate by system size, light plant towns, steps and timeline, cost after Mass Save, Waltham town page. Nearby, same utility: Boston, Cambridge, Somerville, Arlington, Watertown, Woburn, Winchester, Lexington.

Average cost context from Mass Save: $22,000 for a whole-home install finished in 2022, which leaves $13,500 after the 2026 cap. Your quote decides the real number. Questions? Call (781) 210-8400.

Heat pump in Waltham? Decide before the rate drops.

Send two photos and your town. We look at them and get back to you with a price. Or call (781) 210-8400.

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