Baltimore / Ellicott City
Ellicott City has 75,257 residents (give or take 2,426) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2426000, checked 2026-10-19), about 2,508 people per square mile.
Ellicott City is about 12 miles from the Census center point for Baltimore in a straight line and covers 30.007 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 Ellicott City that is 21042, 21043 (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 26,919 occupied homes in Ellicott City, 54% heat with natural gas, 3% with heating oil, 41% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2426000, checked 2026-10-19).
Gas heats 54% of Ellicott City against electricity at 41%, 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.
Ellicott City has about the Howard County oil share of 4% and 9 points less electric heat than the county's 50% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US24027, checked 2026-10-19).
Ellicott City has 27,645 housing units, 2% built before 1940 and 26% before 1980, with 35% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2426000, checked 2026-10-19).
Ellicott City has 6 points more homes built after 2000 than the county's 29% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US24027, checked 2026-10-19).
The median Ellicott City home was built in 1992 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2426000, checked 2026-10-19) and the median home has 7.2 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2426000, checked 2026-10-19).
54% of Ellicott City homes are single-family detached, 1% are in two- to four-unit buildings and 26% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2426000, checked 2026-10-19).
28% of Ellicott City homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2426000, checked 2026-10-19), so beside the 54% 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 Ellicott City 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 Ellicott City is $156,964 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2426000, 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), Howard 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 Howard County cold-day number a Ellicott City 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 whether the quote is whole-home or partial-home, because with 54% of Ellicott City on gas and 41% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Ellicott City home has 7.2 rooms and was built around 1992, 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 Ellicott City. The public number is the number the contractor quotes from.
No local contractor is named on this door for Ellicott City yet. A request from this page goes to the first licensed shop that takes the door.