Arlington / Lorton
Lorton has 20,991 residents (give or take 2,369) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US5147064, checked 2026-10-19), about 3,940 people per square mile.
Lorton is about 14 miles from the Census center point for Arlington in a straight line and covers 5.327 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).
Median household income in Lorton is $138,685 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US5147064, 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.
3,940 people per square mile puts Lorton in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
36% of Lorton homes are single-family detached, 0% are in two- to four-unit buildings and 29% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US5147064, checked 2026-10-19).
36% of Lorton homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US5147064, checked 2026-10-19), so beside the 36% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Lorton has 10 points fewer detached houses than Fairfax County overall (46%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US51059, checked 2026-10-19).
Of the 6,595 occupied homes in Lorton, 56% heat with natural gas, 2% with heating oil, 40% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US5147064, checked 2026-10-19).
Gas heats 56% of Lorton against electricity at 40%, 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.
Lorton has about the Fairfax County oil share of 1% and 2 points less electric heat than the county's 42% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US51059, checked 2026-10-19).
No electric utility is on file for Lorton on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Lorton has 7,319 housing units, 0% built before 1940 and 16% before 1980, with 46% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5147064, checked 2026-10-19).
Lorton has 26 points more homes built after 2000 than the county's 20% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US51059, checked 2026-10-19).
The median Lorton home was built in 1997 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US5147064, 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=160XX00US5147064, checked 2026-10-19).
46% of Lorton housing was built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5147064, checked 2026-10-19), and homes that recent usually meet the insulation codes in place at the time, so a heat pump sized to the floor plan lands closer to the real load than it would in an older neighborhood.
Heating design temperature: 14F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Fairfax County row, 99% heating, PDF pages 127 to 133 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 14F figure is the Fairfax County cold-day number a Lorton heat pump is sized against, so ask the installer to show the system's heating output at 14F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 56% of Lorton on gas and 40% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Lorton home has 6.2 rooms and was built around 1997, 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 Lorton. The public number is the number the contractor quotes from.
No local contractor is named on this door for Lorton yet. A request from this page goes to the first licensed shop that takes the door.