Wilmington / Wilmington Manor
Wilmington Manor is about 4 miles from the Census center point for Wilmington in a straight line and covers 1.634 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).
Wilmington Manor has 8,214 residents (give or take 846) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US1077840, checked 2026-10-19), about 5,027 people per square mile.
5,027 people per square mile puts Wilmington Manor in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
Of the 3,429 occupied homes in Wilmington Manor, 54% heat with natural gas, 16% with heating oil, 24% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US1077840, checked 2026-10-19).
Wilmington Manor has 7 points more oil heat than New Castle County as a whole, where 9% of homes burn oil, and 8 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).
Gas leads in Wilmington Manor at 54%, but 17% of homes still burn delivered oil or propane, and those 583 or so homes are where a heat pump pays back fastest.
The median Wilmington Manor home was built in 1957 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US1077840, 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=160XX00US1077840, checked 2026-10-19).
Wilmington Manor has 3,536 housing units, 2% built before 1940 and 94% before 1980, with 3% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1077840, checked 2026-10-19).
Wilmington Manor has 9 points fewer pre-1940 homes than New Castle County as a whole (11%) and 17 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).
94% of Wilmington Manor homes were built before 1980 and only 3% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US1077840, 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.
82% of Wilmington Manor homes are single-family detached, 13% are in two- to four-unit buildings and 5% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US1077840, checked 2026-10-19).
With 82% detached houses and 13% in small multi-family buildings, a Wilmington Manor quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 25% of Wilmington Manor homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US1077840, checked 2026-10-19), the landlord signs the quote in many of them.
Wilmington Manor has 29 points more detached houses than New Castle County overall (53%) and 14 points fewer five-plus-unit buildings than the county's 19% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US10003, checked 2026-10-19).
No electric utility is on file for Wilmington Manor on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Median household income in Wilmington Manor is $78,078 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US1077840, 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: 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 Wilmington Manor 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 54% of Wilmington Manor on gas and 24% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Wilmington Manor home has 5.6 rooms and was built around 1957, 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 Wilmington Manor. The public number is the number the contractor quotes from.
No local contractor is named on this door for Wilmington Manor yet. A request from this page goes to the first licensed shop that takes the door.