Baltimore / Parkville
Parkville has 30,549 residents (give or take 1,694) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2460275, checked 2026-10-19), about 7,129 people per square mile.
Parkville is about 7 miles from the Census center point for Baltimore in a straight line and covers 4.285 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 Parkville that is 21234 (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 Parkville is $79,178 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2460275, 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.
7,129 people per square mile puts Parkville in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
43% of Parkville homes are single-family detached, 8% are in two- to four-unit buildings and 19% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2460275, checked 2026-10-19).
38% of Parkville homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2460275, checked 2026-10-19), so beside the 43% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Of the 12,481 occupied homes in Parkville, 71% heat with natural gas, 3% with heating oil, 23% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2460275, checked 2026-10-19).
Gas heats 71% of Parkville against electricity at 23%, 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.
Parkville has 4 points less oil heat than Baltimore County as a whole, where 7% of homes burn oil, and 15 points less 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 Parkville on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Parkville has 13,503 housing units, 7% built before 1940 and 90% before 1980, with 2% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2460275, checked 2026-10-19).
Parkville has 13 points fewer 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 Parkville home was built in 1957 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2460275, checked 2026-10-19) and the median home has 6.2 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2460275, checked 2026-10-19).
90% of Parkville homes were built before 1980 and only 2% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2460275, 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: 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 Parkville 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 71% of Parkville on gas and 23% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Parkville home has 6.2 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 Parkville. The public number is the number the contractor quotes from.
No local contractor is named on this door for Parkville yet. A request from this page goes to the first licensed shop that takes the door.