Boston / Plymouth
Plymouth has 63,953 residents (give or take 79) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2502354310, checked 2026-10-19), about 663 people per square mile.
Plymouth is about 37 miles from the Census center point for Boston in a straight line and covers 96.427 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).
The quote form takes a ZIP code; for Plymouth that is 02360, 02366 (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 26,563 occupied homes in Plymouth, 38% heat with natural gas, 28% with heating oil, 15% with electricity and 16% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2502354310, checked 2026-10-19).
Gas leads in Plymouth at 38%, but 44% of homes still burn delivered oil or propane, and those 11,688 or so homes are where a heat pump pays back fastest.
Plymouth has 4 points less oil heat than Plymouth County as a whole, where 32% of homes burn oil, and 3 points more electric heat than the county's 12% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US25023, checked 2026-10-19).
Plymouth has 29,213 housing units, 16% built before 1940 and 47% before 1980, with 29% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2502354310, checked 2026-10-19).
Plymouth has 5 points fewer pre-1940 homes than Plymouth County as a whole (21%) and 11 points more homes built after 2000 than the county's 18% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US25023, checked 2026-10-19).
The median Plymouth home was built in 1982 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2502354310, 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=060XX00US2502354310, checked 2026-10-19).
66% of Plymouth homes are single-family detached, 9% are in two- to four-unit buildings and 13% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2502354310, checked 2026-10-19).
21% of Plymouth homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502354310, checked 2026-10-19), so beside the 66% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Only 29% of Plymouth homes are new enough to pass the whole-home rebate's weatherization check on age, and 16% date from before 1940, so most of the other 71% show it with a home energy assessment before the heat pump goes in.
Eversource Energy lists Plymouth 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 Plymouth 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 Plymouth is $116,941 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2502354310, 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: 9F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Plymouth 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 9F figure is the Plymouth County cold-day number a Plymouth heat pump is sized against, so ask the installer to show the system's heating output at 9F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 38% of Plymouth on gas and 15% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Plymouth home has 5.8 rooms and was built around 1982, 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 Plymouth. The public number is the number the contractor quotes from.
No local contractor is named on this door for Plymouth yet. A request from this page goes to the first licensed shop that takes the door.