Boston / Medfield
Medfield is about 18 miles from the Census center point for Boston in a straight line and covers 14.409 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).
Medfield has 13,068 residents (give or take 31) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2502139765, checked 2026-10-19), about 907 people per square mile.
The quote form takes a ZIP code; for Medfield that is 02052 (Census 2020 ZCTA to county subdivision relationship file, ZIP areas at least 20% inside the town, https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_cousub20_natl.txt, checked 2026-10-19).
Of the 4,680 occupied homes in Medfield, 59% heat with natural gas, 26% with heating oil, 10% with electricity and 5% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2502139765, checked 2026-10-19).
Medfield has 3 points more oil heat than Norfolk County as a whole, where 23% of homes burn oil, and 8 points less electric heat than the county's 18% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US25021, checked 2026-10-19).
Gas leads in Medfield at 59%, but 31% of homes still burn delivered oil or propane, and those 1,451 or so homes are where a heat pump pays back fastest.
The median Medfield home was built in 1970 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2502139765, checked 2026-10-19) and the median home has 8 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US2502139765, checked 2026-10-19).
Medfield has 4,820 housing units, 13% built before 1940 and 64% before 1980, with 16% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2502139765, checked 2026-10-19).
Medfield has 13 points fewer pre-1940 homes than Norfolk County as a whole (26%) (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US25021, checked 2026-10-19).
Only 16% of Medfield 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 84% show it with a home energy assessment before the heat pump goes in.
81% of Medfield homes are single-family detached, 5% are in two- to four-unit buildings and 9% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2502139765, checked 2026-10-19).
With 81% detached houses and 5% in small multi-family buildings, a Medfield quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 14% of Medfield homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502139765, checked 2026-10-19), the landlord signs the quote in many of them.
Medfield has 24 points more detached houses than Norfolk County overall (57%) and 16 points fewer five-plus-unit buildings than the county's 25% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US25021, checked 2026-10-19).
Only 14% of Medfield homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502139765, checked 2026-10-19), so nearly every quote here is the resident talking to the installer directly, and the rebate goes to the person living in the house.
Eversource Energy lists Medfield among the Massachusetts communities it serves for electricity (Eversource Energy communities we serve, https://www.eversource.com/residential/services/communities-we-serve, checked 2026-10-19).
For a Medfield address billed by Eversource Energy, the Mass Save 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 Medfield is $235,800 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2502139765, 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.
Heating design temperature: 1F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Norfolk 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 1F figure is the Norfolk County cold-day number a Medfield heat pump is sized against, so ask the installer to show the system's heating output at 1F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 59% of Medfield on gas and 10% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Medfield home has 8 rooms and was built around 1970, 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 Medfield. The public number is the number the contractor quotes from.
No local contractor is named on this door for Medfield yet. A request from this page goes to the first licensed shop that takes the door.