Baltimore / Middle River
Middle River has 31,712 residents (give or take 1,960) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2452300, checked 2026-10-19), about 2,486 people per square mile.
Middle River is about 10 miles from the Census center point for Baltimore in a straight line and covers 12.758 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 Middle River that is 21220 (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 Middle River is $78,398 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2452300, 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.
41% of Middle River homes are single-family detached, 3% are in two- to four-unit buildings and 16% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2452300, checked 2026-10-19).
34% of Middle River homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2452300, checked 2026-10-19), so beside the 41% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Middle River has 6 points fewer detached houses than Baltimore County overall (47%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US24005, checked 2026-10-19).
Of the 12,531 occupied homes in Middle River, 42% heat with natural gas, 11% with heating oil, 43% with electricity and 2% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2452300, checked 2026-10-19).
Electricity already heats 43% of Middle River homes, ahead of gas at 42%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Middle River has 4 points more oil heat than Baltimore County as a whole, where 7% of homes burn oil, and 5 points more electric heat than the county's 38% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US24005, checked 2026-10-19).
No electric utility is on file for Middle River on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Middle River has 13,410 housing units, 2% built before 1940 and 48% before 1980, with 30% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2452300, checked 2026-10-19).
Middle River has 5 points fewer pre-1940 homes than Baltimore County as a whole (7%) and 15 points more homes built after 2000 than the county's 15% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US24005, checked 2026-10-19).
The median Middle River home was built in 1982 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2452300, 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=160XX00US2452300, checked 2026-10-19).
Heating design temperature: 12F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Baltimore County row, 99% heating, PDF pages 55 to 56 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 12F figure is the Baltimore County cold-day number a Middle River heat pump is sized against, so ask the installer to show the system's heating output at 12F, not at the milder rating-label temperature.
Ask for the heat-loss calculation room by room; the median Middle River home has 5.8 rooms and was built around 1982, 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 Middle River. The public number is the number the contractor quotes from.
No local contractor is named on this door for Middle River yet. A request from this page goes to the first licensed shop that takes the door.