Portland / Yarmouth
Yarmouth is about 11 miles from the Census center point for Portland in a straight line and covers 13.405 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).
Yarmouth has 9,053 residents (give or take 23) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=060XX00US2300587845, checked 2026-10-19), about 675 people per square mile.
The quote form takes a ZIP code; for Yarmouth that is 04096 (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 3,506 occupied homes in Yarmouth, 16% heat with natural gas, 58% with heating oil, 12% with electricity and 9% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=060XX00US2300587845, checked 2026-10-19).
Yarmouth has 12 points more oil heat than Cumberland County as a whole, where 46% of homes burn oil, and 3 points less 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).
Heating oil is the largest single fuel in Yarmouth at 58%, ahead of gas at 16%, 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.
The median Yarmouth home was built in 1973 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=060XX00US2300587845, checked 2026-10-19) and the median home has 6.7 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=060XX00US2300587845, checked 2026-10-19).
Yarmouth has 3,639 housing units, 17% built before 1940 and 66% before 1980, with 11% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2300587845, checked 2026-10-19).
Yarmouth has 6 points fewer 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).
66% of Yarmouth homes were built before 1980 and only 11% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=060XX00US2300587845, 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.
76% of Yarmouth homes are single-family detached, 4% are in two- to four-unit buildings and 12% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=060XX00US2300587845, checked 2026-10-19).
With 76% detached houses and 4% in small multi-family buildings, a Yarmouth quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 20% of Yarmouth homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=060XX00US2300587845, checked 2026-10-19), the landlord signs the quote in many of them.
Yarmouth has 13 points more detached houses than Cumberland County overall (63%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US23005, checked 2026-10-19).
No electric utility is on file for Yarmouth 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 Yarmouth address before counting it. With 12% of Yarmouth 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 Yarmouth is $110,216 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=060XX00US2300587845, 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: -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 Yarmouth 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 what happens to the oil tank, since 58% of the 3,506 occupied Yarmouth homes have one and removal is usually a separate line on the quote.
Ask for the heat-loss calculation room by room; the median Yarmouth home has 6.7 rooms and was built around 1973, 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 Yarmouth. The public number is the number the contractor quotes from.
No local contractor is named on this door for Yarmouth yet. A request from this page goes to the first licensed shop that takes the door.