Baltimore / Cambridge
Cambridge has 13,152 residents (give or take 34) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2412400, checked 2026-10-19), about 1,235 people per square mile.
Cambridge is about 59 miles from the Census center point for Baltimore in a straight line and covers 10.647 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).
Of the 5,629 occupied homes in Cambridge, 31% heat with natural gas, 8% with heating oil, 55% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2412400, checked 2026-10-19).
Electricity already heats 55% of Cambridge homes, ahead of gas at 31%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Cambridge has 7 points less oil heat than Dorchester County as a whole, where 15% of homes burn oil, and 2 points more electric heat than the county's 53% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US24019, checked 2026-10-19).
Cambridge has 6,652 housing units, 21% built before 1940 and 60% before 1980, with 28% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2412400, checked 2026-10-19).
Cambridge has 3 points more pre-1940 homes than Dorchester County as a whole (18%) and 5 points more homes built after 2000 than the county's 23% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US24019, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Cambridge home was built in 1970 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2412400, checked 2026-10-19) and the median home has 5.5 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2412400, checked 2026-10-19).
57% of Cambridge homes are single-family detached, 11% are in two- to four-unit buildings and 23% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2412400, checked 2026-10-19).
59% of Cambridge homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2412400, checked 2026-10-19), so beside the 57% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Cambridge has 16 points fewer detached houses than Dorchester County overall (73%) and 12 points more five-plus-unit buildings than the county's 11% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US24019, checked 2026-10-19).
59% of Cambridge homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2412400, checked 2026-10-19), so the market splits between resident-led jobs where the occupant picks the system and landlord-led jobs where they do not, and the rebate paperwork differs.
60% of Cambridge homes were built before 1980 and only 28% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2412400, 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.
No electric utility is on file for Cambridge 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 Cambridge is $47,323 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2412400, 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: 18F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Dorchester 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 18F figure is the Dorchester County cold-day number a Cambridge heat pump is sized against, so ask the installer to show the system's heating output at 18F, not at the milder rating-label temperature.
Ask for the heat-loss calculation room by room; the median Cambridge home has 5.5 rooms and was built around 1970, 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 Cambridge. The public number is the number the contractor quotes from.
No local contractor is named on this door for Cambridge yet. A request from this page goes to the first licensed shop that takes the door.