Baltimore / Eldersburg
Eldersburg has 31,695 residents (give or take 1,229) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2425575, checked 2026-10-19), about 796 people per square mile.
Eldersburg is about 20 miles from the Census center point for Baltimore in a straight line and covers 39.814 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 Eldersburg that is 21104, 21784 (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).
Of the 10,903 occupied homes in Eldersburg, 36% heat with natural gas, 15% with heating oil, 44% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2425575, checked 2026-10-19).
Electricity already heats 44% of Eldersburg homes, ahead of gas at 36%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Eldersburg has 3 points less oil heat than Carroll County as a whole, where 18% of homes burn oil, and 6 points less electric heat than the county's 50% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US24013, checked 2026-10-19).
Eldersburg has 11,183 housing units, 3% built before 1940 and 37% before 1980, with 23% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2425575, checked 2026-10-19).
Eldersburg has 8 points fewer pre-1940 homes than Carroll County as a whole (11%) (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US24013, checked 2026-10-19).
The median Eldersburg home was built in 1987 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2425575, checked 2026-10-19) and the median home has 7.7 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2425575, checked 2026-10-19).
82% of Eldersburg homes are single-family detached, 1% are in two- to four-unit buildings and 7% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2425575, checked 2026-10-19).
With 82% detached houses and 1% in small multi-family buildings, a Eldersburg quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 12% of Eldersburg homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2425575, checked 2026-10-19), the landlord signs the quote in many of them.
Only 12% of Eldersburg homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2425575, checked 2026-10-19), so nearly every quote here is the resident talking to the installer directly, and the rebate goes to the person living in the house.
No electric utility is on file for Eldersburg 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 Eldersburg is $142,954 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2425575, 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: 12F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Carroll 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 Carroll County cold-day number a Eldersburg 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 Eldersburg home has 7.7 rooms and was built around 1987, 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 Eldersburg. The public number is the number the contractor quotes from.
No local contractor is named on this door for Eldersburg yet. A request from this page goes to the first licensed shop that takes the door.