Mass Save heat pump rebate in Somerville
Eversource serves Somerville. 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
The short answer for Somerville. 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 (east side), Eversource (west side)). 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. Gas splits east and west across the city (DPU franchise list).
Somerville estimator
What could a Somerville home get back?
Your estimate
Up to $8,500
Finished in 2026: $2,650 for each ton, up to $8,500.
What to do next
Rates: Mass Save, read November 6, 2026. An estimate, not an offer. Mass Save decides who qualifies and pays the rebate.
What Mass Save pays in Somerville: 2026 against 2027
| System | Installed 2026 | From Jan 1, 2027 | Change |
|---|---|---|---|
| 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 |
Which account do you apply with in Somerville?
| Your heat today | Apply with | Somerville homes (Census) |
|---|---|---|
| Oil, propane or electric resistance | Your electric account (Eversource, a Mass Save electric sponsor) | 10,215 homes (29%): 2,202 oil, 6,905 electric, 1,108 propane |
| Natural gas | Your gas account: National Grid (east side), Eversource (west side). Mass Save's gas sponsor rule. | 24,824 homes (70%) |
What qualifies a Somerville home
The median home in Somerville was built in 1938, 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. 34% of Somerville 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.
Permits in Somerville
Inspectional Services Department
- Address
- 1 Franey Rd., Somerville, MA 02145
- Phone
- 617-625-6600 x5600
- Hours
- Mon to Wed 8 am to 4 pm, Thu 8 am to 7 pm, Fri 8 am to noon
- isd@somervillema.gov
The December 31 timeline for Somerville
- 1NowGet proposalsTwo or three installers in the Mass Save network. Ask each for a firm install date.
- 2By Dec 31, 2026Heat pump installedThe install date sets the rate. $2,650 per ton, up to $8,500 (whole-home).
- 3Jan 1, 2027New rate startsInstalls on or after this date: $2,350 per ton, up to $7,500 (whole-home).
- 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 Somerville
Does Somerville get Mass Save heat pump rebates?
Yes. In Somerville, electricity comes from Eversource and gas from National Grid (east side), Eversource (west side). 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 Somerville 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 Somerville?
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 Somerville?
Somerville's Inspectional Services Department handles permits. Call 617-625-6600 x5600 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 Somerville 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 Somerville 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 Somerville 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 Somerville
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 Somerville? Decide before the rate drops.
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