Madison / Greenfield
Greenfield has 37,345 residents (give or take 88) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US5531175, checked 2026-10-19), about 3,238 people per square mile.
Greenfield is about 72 miles from the Census center point for Madison in a straight line and covers 11.532 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 Greenfield that is 53220, 53221, 53228 (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 Greenfield is $70,459 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US5531175, 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.
3,238 people per square mile puts Greenfield in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
45% of Greenfield homes are single-family detached, 7% are in two- to four-unit buildings and 40% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US5531175, checked 2026-10-19).
With 40% of Greenfield homes in buildings of five or more units and 45% detached, the condo association usually decides where outdoor units can go, so that approval comes before the quote. With 45% of Greenfield homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US5531175, checked 2026-10-19), the landlord signs the quote in many of them.
Greenfield has 12 points more five-plus-unit buildings than the county's 28% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US55079, checked 2026-10-19).
45% of Greenfield homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US5531175, 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 17,393 occupied homes in Greenfield, 73% heat with natural gas, 1% with heating oil, 23% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US5531175, checked 2026-10-19).
Gas heats 73% of Greenfield against electricity at 23%, 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.
Greenfield has about the Milwaukee County oil share of 1% and 4 points more electric heat than the county's 19% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US55079, checked 2026-10-19).
No electric utility is on file for Greenfield on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Focus on Energy air source heat pump instant discount (ratepayer), run by Focus on Energy, is a live program for Wisconsin addresses and covers qualifying equipment at $900 per system (registry row 20 verified 2026-10-07, https://assets.focusonenergy.com/production/docs/trade-ally/TAS-Trade-Ally-Solutions-Rebates-Overview-20260101_CLEAN.pdf, checked 2026-10-16); confirm eligibility for the Greenfield address before counting it. With 23% of Greenfield homes already on electric heat and 75% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Greenfield has 17,932 housing units, 6% built before 1940 and 66% before 1980, with 13% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5531175, checked 2026-10-19).
Greenfield has 22 points fewer pre-1940 homes than Milwaukee County as a whole (28%) and 3 points more homes built after 2000 than the county's 10% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US55079, checked 2026-10-19).
The median Greenfield home was built in 1974 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US5531175, checked 2026-10-19) and the median home has 4.8 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US5531175, checked 2026-10-19).
66% of Greenfield homes were built before 1980 and only 13% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5531175, 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.
Heating design temperature: -5F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Milwaukee County row, 99% heating, PDF pages 137 to 140 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 -5F figure is the Milwaukee County cold-day number a Greenfield heat pump is sized against, so ask the installer to show the system's heating output at -5F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 73% of Greenfield on gas and 23% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Greenfield home has 4.8 rooms and was built around 1974, 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 Greenfield. The public number is the number the contractor quotes from.
No local contractor is named on this door for Greenfield yet. A request from this page goes to the first licensed shop that takes the door.