Portland / Kennebunk
Kennebunk has 11,820 residents (give or take 24) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2303136535, checked 2026-10-19), about 337 people per square mile.
Kennebunk is about 25 miles from the Census center point for Portland in a straight line and covers 35.114 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 Kennebunk that is 04043 (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).
Kennebunk is spread out at 337 people per square mile across 35.114 square miles of land, so a long refrigerant line run between the outdoor unit and the farthest indoor head is the sizing question an installer checks first.
Of the 5,364 occupied homes in Kennebunk, 9% heat with natural gas, 56% with heating oil, 15% with electricity and 18% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2303136535, checked 2026-10-19).
Heating oil is the largest single fuel in Kennebunk at 56%, ahead of propane at 18%, so the usual job here is an oil boiler or furnace coming out and a cold-climate heat pump going in, with the oil tank removed.
Kennebunk has 4 points less oil heat than York County as a whole, where 60% of homes burn oil, and 5 points more electric heat than the county's 10% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US23031, checked 2026-10-19).
Kennebunk has 6,403 housing units, 19% built before 1940 and 44% before 1980, with 25% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2303136535, checked 2026-10-19).
Kennebunk tracks York County on housing age, with the county at 20% pre-1940 and 24% post-2000 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US23031, checked 2026-10-19).
The median Kennebunk home was built in 1983 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2303136535, checked 2026-10-19) and the median home has 6.1 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US2303136535, checked 2026-10-19).
65% of Kennebunk homes are single-family detached, 12% are in two- to four-unit buildings and 6% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2303136535, checked 2026-10-19).
19% of Kennebunk homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2303136535, checked 2026-10-19), so beside the 65% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Kennebunk has 5 points fewer detached houses than York County overall (70%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US23031, checked 2026-10-19).
No electric utility is on file for Kennebunk on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Efficiency Maine whole-home heat pump rebate, run by Efficiency Maine, is a live program for Maine addresses and lists a standard figure of $3,000 (registry row 7 verified 2026-10-15, https://www.efficiencymaine.com/whole-home-heat-pump-rebates/, checked 2026-10-16); confirm eligibility for the Kennebunk address before counting it. With 15% of Kennebunk homes already on electric heat and 83% 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 Kennebunk is $107,804 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2303136535, 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: 0F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), York County row, 99% heating, PDF pages 54 to 55 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 0F figure is the York County cold-day number a Kennebunk heat pump is sized against, so ask the installer to show the system's heating output at 0F, not at the milder rating-label temperature.
Ask what happens to the oil tank, since 56% of the 5,364 occupied Kennebunk homes have one and removal is usually a separate line on the quote.
Ask for the heat-loss calculation room by room; the median Kennebunk home has 6.1 rooms and was built around 1983, 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 Kennebunk. The public number is the number the contractor quotes from.
No local contractor is named on this door for Kennebunk yet. A request from this page goes to the first licensed shop that takes the door.