Boston / Winthrop
Winthrop has 18,759 residents (give or take 48) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2502581005, checked 2026-10-19), about 9,408 people per square mile.
Winthrop is about 4 miles from the Census center point for Boston in a straight line and covers 1.994 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 Winthrop that is 02152 (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).
Median household income in Winthrop is $116,167 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2502581005, 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.
At 9,408 people per square mile, Winthrop is dense enough that noise setback rules and outdoor-unit placement on a small lot are the first questions the installer works through.
31% of Winthrop homes are single-family detached, 37% are in two- to four-unit buildings and 28% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2502581005, checked 2026-10-19).
A two- or three-family building is the common Winthrop case at 37% of the stock against 31% detached houses, and each unit usually gets its own small outdoor unit and its own rebate account rather than one big system for the building. With 43% of Winthrop homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502581005, checked 2026-10-19), the landlord signs the quote in many of them.
Winthrop has 18 points more detached houses than Suffolk County overall (13%) and 17 points fewer five-plus-unit buildings than the county's 45% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US25025, checked 2026-10-19).
43% of Winthrop homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2502581005, checked 2026-10-19), so the market splits between resident-led jobs where the occupant picks the system and landlord-led jobs where they do not, and the rebate paperwork differs.
Of the 7,899 occupied homes in Winthrop, 64% heat with natural gas, 13% with heating oil, 19% with electricity and 2% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2502581005, checked 2026-10-19).
Gas leads in Winthrop at 64%, but 15% of homes still burn delivered oil or propane, and those 1,185 or so homes are where a heat pump pays back fastest.
Winthrop has 6 points more oil heat than Suffolk County as a whole, where 7% of homes burn oil, and 12 points less electric heat than the county's 31% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US25025, checked 2026-10-19).
No electric utility is on file for Winthrop on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
If the Winthrop 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).
Winthrop has 8,361 housing units, 55% built before 1940 and 87% before 1980, with 5% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2502581005, checked 2026-10-19).
Winthrop has 9 points more pre-1940 homes than Suffolk County as a whole (46%) and 13 points fewer homes built after 2000 than the county's 18% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US25025, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Winthrop home was built in 1938 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2502581005, checked 2026-10-19) and the median home has 5.4 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US2502581005, checked 2026-10-19).
With 55% of homes built before 1940 and only 5% new enough to pass on age, the first question for a Winthrop house is insulation: the whole-home rebate wants proof the house is weatherized, and a no-cost home energy assessment is the usual way an older home shows it.
Heating design temperature: 1F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Suffolk 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 Suffolk County cold-day number a Winthrop 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 64% of Winthrop on gas and 19% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; a Winthrop house from before 1940 (55% of the 8,361 units) rarely matches a square-footage rule of thumb.
The form on this page is the follow-up for Winthrop. The public number is the number the contractor quotes from.
No local contractor is named on this door for Winthrop yet. A request from this page goes to the first licensed shop that takes the door.