Detroit / Plymouth
Plymouth is about 19 miles from the Census center point for Detroit in a straight line and covers 2.212 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).
Plymouth has 9,214 residents (give or take 54) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2665060, checked 2026-10-19), about 4,165 people per square mile.
4,165 people per square mile puts Plymouth in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
Of the 4,185 occupied homes in Plymouth, 88% heat with natural gas, 0% with heating oil, 11% with electricity and 0% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2665060, checked 2026-10-19).
Plymouth has about the Wayne County oil share of 0% and 3 points less electric heat than the county's 14% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US26163, checked 2026-10-19).
Gas heats 88% of Plymouth against electricity at 11%, so most quotes here are a partial-home system that carries the shoulder seasons and the summer while the gas furnace handles the coldest nights, or a whole-home system when the house is ready for it.
The median Plymouth home was built in 1961 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2665060, checked 2026-10-19) and the median home has 5.8 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2665060, checked 2026-10-19).
Plymouth has 4,410 housing units, 30% built before 1940 and 76% before 1980, with 15% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2665060, checked 2026-10-19).
Plymouth has 9 points more pre-1940 homes than Wayne County as a whole (21%) and 6 points more homes built after 2000 than the county's 9% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US26163, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
30% of Plymouth homes were built before 1940 and 76% before 1980 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2665060, 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.
62% of Plymouth homes are single-family detached, 11% are in two- to four-unit buildings and 22% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2665060, checked 2026-10-19).
31% of Plymouth homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2665060, checked 2026-10-19), so beside the 62% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Plymouth has 8 points fewer detached houses than Wayne County overall (70%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US26163, checked 2026-10-19).
No electric utility is on file for Plymouth on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
DTE Energy heating and cooling rebates (southeast Michigan only), run by DTE Energy, is a live program for Michigan addresses and covers qualifying equipment at $1,500 per system (registry row 19 verified 2026-10-15, https://www.dteenergy.com/us/en/residential/save-money-energy/rebates-and-offers/air-conditioners.html, checked 2026-10-16); confirm eligibility for the Plymouth address before counting it. With 11% of Plymouth homes already on electric heat and 88% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Consumers Energy Home Solutions 2026 (ASHP), run by Consumers Energy, is a live program for Michigan addresses and lists a standard figure of $300 (registry row 50 verified 2026-10-15, https://www.consumersenergy.com/residential/savings-and-clean-energy/rebates/heating-and-cooling, checked 2026-10-16); confirm eligibility for the Plymouth address before counting it.
Median household income in Plymouth is $112,145 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2665060, 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), Wayne County row, 99% heating, PDF pages 56 to 60 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 Wayne County cold-day number a Plymouth 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 88% of Plymouth on gas and 11% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; a Plymouth house from before 1940 (30% of the 4,410 units) rarely matches a square-footage rule of thumb.
The form on this page is the follow-up for Plymouth. The public number is the number the contractor quotes from.
No local contractor is named on this door for Plymouth yet. A request from this page goes to the first licensed shop that takes the door.