Portland / Portland
Portland has 68,854 residents (give or take 52) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2300560545, checked 2026-10-19), about 3,197 people per square mile.
Portland is the city this door is named for; it covers 21.54 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 Portland that is 04019, 04101, 04102, 04103, 04108, 04109 (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).
Median household income in Portland is $79,540 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2300560545, 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.
3,197 people per square mile puts Portland in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
36% of Portland homes are single-family detached, 27% are in two- to four-unit buildings and 33% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2300560545, checked 2026-10-19).
53% of Portland homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2300560545, checked 2026-10-19), so beside the 36% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Portland has 27 points fewer detached houses than Cumberland County overall (63%) and 18 points more five-plus-unit buildings than the county's 15% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US23005, checked 2026-10-19).
53% of Portland homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2300560545, 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 32,965 occupied homes in Portland, 39% heat with natural gas, 31% with heating oil, 21% with electricity and 6% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2300560545, checked 2026-10-19).
Gas leads in Portland at 39%, but 37% of homes still burn delivered oil or propane, and those 12,197 or so homes are where a heat pump pays back fastest.
Portland has 15 points less oil heat than Cumberland County as a whole, where 46% of homes burn oil, and 6 points more electric heat than the county's 15% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US23005, checked 2026-10-19).
No electric utility is on file for Portland 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 Portland address before counting it. With 21% of Portland homes already on electric heat and 76% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Portland has 36,559 housing units, 46% built before 1940 and 76% before 1980, with 11% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2300560545, checked 2026-10-19).
Portland has 23 points more pre-1940 homes than Cumberland County as a whole (23%) and 11 points fewer homes built after 2000 than the county's 22% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US23005, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Portland home was built in 1946 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2300560545, checked 2026-10-19) and the median home has 4.9 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US2300560545, checked 2026-10-19).
46% of Portland homes were built before 1940 and 76% before 1980 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2300560545, checked 2026-10-19), so insulation is the first sizing question: an older home leaks more heat per square foot, and the installer runs a room-by-room heat-loss calculation to size the system for what the walls and windows actually hold in, not just the floor plan.
Heating design temperature: -4F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Cumberland 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 -4F figure is the Cumberland County cold-day number a Portland heat pump is sized against, so ask the installer to show the system's heating output at -4F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 39% of Portland on gas and 21% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; a Portland house from before 1940 (46% of the 36,559 units) rarely matches a square-footage rule of thumb.
The form on this page is the follow-up for Portland. The public number is the number the contractor quotes from.
No local contractor is named on this door for Portland yet. A request from this page goes to the first licensed shop that takes the door.