Wilmington / Elsmere
Elsmere has 6,203 residents (give or take 24) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1024540, checked 2026-10-19), about 6,285 people per square mile.
Elsmere is about 3 miles from the Census center point for Wilmington in a straight line and covers 0.987 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).
Median household income in Elsmere is $67,944 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1024540, 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.
6,285 people per square mile puts Elsmere in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
37% of Elsmere homes are single-family detached, 12% are in two- to four-unit buildings and 14% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US1024540, checked 2026-10-19).
34% of Elsmere homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1024540, checked 2026-10-19), so beside the 37% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Elsmere has 16 points fewer detached houses than New Castle County overall (53%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US10003, checked 2026-10-19).
Of the 2,238 occupied homes in Elsmere, 74% heat with natural gas, 6% with heating oil, 20% with electricity and 0% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1024540, checked 2026-10-19).
Gas heats 74% of Elsmere against electricity at 20%, 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.
Elsmere has 3 points less oil heat than New Castle County as a whole, where 9% of homes burn oil, and 12 points less electric heat than the county's 32% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US10003, checked 2026-10-19).
No electric utility is on file for Elsmere on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Elsmere has 2,301 housing units, 12% built before 1940 and 88% before 1980, with 6% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1024540, checked 2026-10-19).
Elsmere has 14 points fewer homes built after 2000 than the county's 20% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US10003, checked 2026-10-19).
The median Elsmere home was built in 1956 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1024540, checked 2026-10-19) and the median home has 5.4 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US1024540, checked 2026-10-19).
88% of Elsmere homes were built before 1980 and only 6% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1024540, 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: 11F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), New Castle County row, 99% heating, PDF page 17 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 11F figure is the New Castle County cold-day number a Elsmere heat pump is sized against, so ask the installer to show the system's heating output at 11F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 74% of Elsmere on gas and 20% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Elsmere home has 5.4 rooms and was built around 1956, 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 Elsmere. The public number is the number the contractor quotes from.
No local contractor is named on this door for Elsmere yet. A request from this page goes to the first licensed shop that takes the door.