Madison / Sun Prairie
Sun Prairie is about 12 miles from the Census center point for Madison in a straight line and covers 13.094 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).
Sun Prairie has 37,570 residents (give or take 68) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US5578600, checked 2026-10-19), about 2,869 people per square mile.
Of the 15,887 occupied homes in Sun Prairie, 71% heat with natural gas, 0% with heating oil, 25% with electricity and 2% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US5578600, checked 2026-10-19).
Sun Prairie has about the Dane County oil share of 0% and the same 25% electric share (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US55025, checked 2026-10-19).
Gas heats 71% of Sun Prairie against electricity at 25%, 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 Sun Prairie home was built in 1999 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US5578600, checked 2026-10-19) and the median home has 5.6 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US5578600, checked 2026-10-19).
Sun Prairie has 16,195 housing units, 3% built before 1940 and 28% before 1980, with 49% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5578600, checked 2026-10-19).
Sun Prairie has 7 points fewer pre-1940 homes than Dane County as a whole (10%) and 16 points more homes built after 2000 than the county's 33% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US55025, checked 2026-10-19).
49% of Sun Prairie housing was built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5578600, checked 2026-10-19), and homes that recent usually meet the insulation codes in place at the time, so a heat pump sized to the floor plan lands closer to the real load than it would in an older neighborhood.
50% of Sun Prairie homes are single-family detached, 9% are in two- to four-unit buildings and 30% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US5578600, checked 2026-10-19).
39% of Sun Prairie homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US5578600, checked 2026-10-19), so beside the 50% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
No electric utility is on file for Sun Prairie 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 Sun Prairie address before counting it. With 25% of Sun Prairie homes already on electric heat and 73% 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 Sun Prairie is $90,942 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US5578600, 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: -6F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Dane 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 -6F figure is the Dane County cold-day number a Sun Prairie heat pump is sized against, so ask the installer to show the system's heating output at -6F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 71% of Sun Prairie on gas and 25% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Sun Prairie home has 5.6 rooms and was built around 1999, 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 Sun Prairie. The public number is the number the contractor quotes from.
No local contractor is named on this door for Sun Prairie yet. A request from this page goes to the first licensed shop that takes the door.