Stamford / Trumbull
Trumbull has 37,281 residents (give or take 29) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US0912077200, checked 2026-10-19), about 1,604 people per square mile.
Trumbull is about 22 miles from the Census center point for Stamford in a straight line and covers 23.239 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 Trumbull that is 06611 (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).
Of the 12,153 occupied homes in Trumbull, 49% heat with natural gas, 40% with heating oil, 6% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US0912077200, checked 2026-10-19).
Gas leads in Trumbull at 49%, but 43% of homes still burn delivered oil or propane, and those 5,226 or so homes are where a heat pump pays back fastest.
Trumbull has 17 points more oil heat than Greater Bridgeport Planning Region as a whole, where 23% of homes burn oil, and 8 points less electric heat than the county's 14% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US09120, checked 2026-10-19).
Trumbull has 12,800 housing units, 10% built before 1940 and 73% before 1980, with 9% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US0912077200, checked 2026-10-19).
Trumbull has 14 points fewer pre-1940 homes than Greater Bridgeport Planning Region as a whole (24%) (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US09120, checked 2026-10-19).
The median Trumbull home was built in 1965 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US0912077200, checked 2026-10-19) and the median home has 6.9 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US0912077200, checked 2026-10-19).
84% of Trumbull homes are single-family detached, 3% are in two- to four-unit buildings and 8% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US0912077200, checked 2026-10-19).
With 84% detached houses and 3% in small multi-family buildings, a Trumbull quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 10% of Trumbull homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US0912077200, checked 2026-10-19), the landlord signs the quote in many of them.
Trumbull has 31 points more detached houses than Greater Bridgeport Planning Region overall (53%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US09120, checked 2026-10-19).
Only 10% of Trumbull homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US0912077200, 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.
73% of Trumbull homes were built before 1980 and only 9% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US0912077200, checked 2026-10-19), so most of the stock predates modern insulation codes; the installer's heat-loss calculation, not a square-footage rule, decides the tonnage.
United Illuminating lists Trumbull among the Connecticut communities it serves for electricity (United Illuminating service area, https://www.uinet.com, checked 2026-10-19).
Energize CT residential heat pump rebate, run by Energize CT, is a live program for Connecticut addresses and publishes its terms without one headline figure (registry row 3 verified 2026-10-15, https://www.energizect.com/node/68091, checked 2026-10-16); confirm eligibility for the Trumbull address before counting it. With 6% of Trumbull homes already on electric heat and 92% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Median household income in Trumbull is $163,073 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US0912077200, checked 2026-10-19); many state and utility heat pump rebate programs set higher incentive tiers for income-qualifying households, so the household income on the application, not the town median, decides which level applies.
Heating design temperature: 2F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Fairfield County row, 99% heating, PDF page 17 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; town filed under Fairfield County by Census Bureau, Connecticut county to county subdivision crosswalk (legacy county for each 2022 planning region town), https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.txt, fetched 2026-10-19, 99%.
That 2F figure is the Fairfield County cold-day number a Trumbull 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.
Ask whether the quote is whole-home or partial-home, because with 49% of Trumbull on gas and 6% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Trumbull home has 6.9 rooms and was built around 1965, 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 Trumbull. The public number is the number the contractor quotes from.
No local contractor is named on this door for Trumbull yet. A request from this page goes to the first licensed shop that takes the door.