Worcester / Westborough

Heat pump installation in Westborough, MA - up to $8,500 Mass Save rebate

Westborough, 10 miles out

Westborough is about 10 miles from the Census center point for Worcester in a straight line and covers 20.6 square miles of land (Census 2024 Gazetteer internal points and land area, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/, checked 2026-10-19).

Westborough has 21,944 residents (give or take 31) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2502775015, checked 2026-10-19), about 1,065 people per square mile.

The quote form takes a ZIP code; for Westborough that is 01581 (Census 2020 ZCTA to county subdivision and ZCTA to place relationship files, ZIP areas at least 20% inside the town, https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_cousub20_natl.txt and https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_place20_natl.txt, checked 2026-10-19).

What heats Westborough

Of the 7,964 occupied homes in Westborough, 49% heat with natural gas, 20% with heating oil, 26% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2502775015, checked 2026-10-19).

Westborough has 18 points less oil heat than Worcester County as a whole, where 38% of homes burn oil, and 6 points more electric heat than the county's 20% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US25027, checked 2026-10-19).

Gas leads in Westborough at 49%, but 23% of homes still burn delivered oil or propane, and those 1,832 or so homes are where a heat pump pays back fastest.

Age of the housing

The median Westborough home was built in 1976 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2502775015, checked 2026-10-19) and the median home has 5.8 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US2502775015, checked 2026-10-19).

Westborough has 8,342 housing units, 13% built before 1940 and 57% before 1980, with 20% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2502775015, checked 2026-10-19).

Westborough has 14 points fewer pre-1940 homes than Worcester County as a whole (27%) and 5 points more homes built after 2000 than the county's 15% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US25027, checked 2026-10-19).

Only 20% of Westborough homes are new enough to pass the whole-home rebate's weatherization check on age, and 13% date from before 1940, so most of the other 80% show it with a home energy assessment before the heat pump goes in.

House type

50% of Westborough homes are single-family detached, 10% are in two- to four-unit buildings and 31% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2502775015, checked 2026-10-19).

38% of Westborough homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502775015, checked 2026-10-19), so beside the 50% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.

Westborough has 7 points fewer detached houses than Worcester County overall (57%) and 14 points more five-plus-unit buildings than the county's 17% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US25027, checked 2026-10-19).

Utility and rebate

No electric utility is on file for Westborough on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.

If the Westborough electric bill comes from one of the Mass Save sponsors (Cape Light Compact, Eversource, National Grid, Unitil), the whole-home heat pump rebate is $2,650 per ton up to $8,500, and the partial-home rebate is $1,125 per ton up to $8,500; for projects installed on or after January 1, 2027, the whole-home figure drops to $2,350 per ton capped at $7,500 (Mass Save air-source heat pump rebates, https://www.masssave.com/residential/rebates-offers-services/heating-and-cooling/heat-pumps/air-source-heat-pumps, checked 2026-10-19).

Median household income in Westborough is $141,944 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2502775015, checked 2026-10-19); Mass Save's enhanced heat pump incentives are income-based and decided household by household, so the town median only hints at how many neighbors qualify.

Design temperature

Heating design temperature: -2F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Worcester County row, 99% heating, PDF page 56 of 141 (Revised 11/11/2020), https://www.energystar.gov/sites/default/files/Design%20Temperature%20Limit%20Reference%20Guide%20(2019%20Ed)%20-%20ENERGY%20STAR%20Single-Family%20New%20Homes_Rev11.pdf, fetched 2026-10-19, 99%.

That -2F figure is the Worcester County cold-day number a Westborough heat pump is sized against, so ask the installer to show the system's heating output at -2F, not at the milder rating-label temperature.

Next step

Ask whether the quote is whole-home or partial-home, because with 49% of Westborough on gas and 26% already electric the two paths carry different rebate figures and different sizing.

Ask for the heat-loss calculation room by room; the median Westborough home has 5.8 rooms and was built around 1976, and the count of heads and the tonnage follow the rooms and the insulation, not the square footage.

The form on this page is the follow-up for Westborough. The public number is the number the contractor quotes from.

No local contractor is named on this door for Westborough yet. A request from this page goes to the first licensed shop that takes the door.

Where should the follow-up go?

We will follow up by email. No calls.

No spam, no sold information. One follow-up about exactly this request.