Charleston / Tega Cay
Tega Cay has 13,615 residents (give or take 23) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US4571417, checked 2026-10-19), about 2,979 people per square mile.
Tega Cay is about 164 miles from the Census center point for Charleston in a straight line and covers 4.571 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 Tega Cay that is 29708 (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 4,940 occupied homes in Tega Cay, 61% heat with natural gas, 0% with heating oil, 38% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US4571417, checked 2026-10-19).
Gas heats 61% of Tega Cay against electricity at 38%, and a cold-climate heat pump sized for this market replaces the gas system outright, so the usual quote is a whole-home install.
Tega Cay has about the York County oil share of 1% and 12 points less electric heat than the county's 50% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US45091, checked 2026-10-19).
Tega Cay has 5,021 housing units, 0% built before 1940 and 12% before 1980, with 65% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US4571417, checked 2026-10-19).
Tega Cay has 3 points fewer pre-1940 homes than York County as a whole (3%) and 15 points more homes built after 2000 than the county's 50% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US45091, checked 2026-10-19).
The median Tega Cay home was built in 2006 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US4571417, checked 2026-10-19) and the median home has 7.6 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US4571417, checked 2026-10-19).
77% of Tega Cay homes are single-family detached, 1% are in two- to four-unit buildings and 9% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US4571417, checked 2026-10-19).
With 77% detached houses and 1% in small multi-family buildings, a Tega Cay quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 16% of Tega Cay homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US4571417, checked 2026-10-19), the landlord signs the quote in many of them.
Tega Cay has 8 points more detached houses than York County overall (69%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US45091, checked 2026-10-19).
65% of Tega Cay housing was built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US4571417, 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.
No electric utility is on file for Tega Cay 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 Tega Cay is $142,000 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US4571417, 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: 22F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), York County row, 99% heating, PDF pages 105 to 107 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 22F figure is the York County cold-day number a Tega Cay heat pump is sized against, so ask the installer to show the system's heating output at 22F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 61% of Tega Cay on gas and 38% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; the median Tega Cay home has 7.6 rooms and was built around 2006, 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 Tega Cay. The public number is the number the contractor quotes from.
No local contractor is named on this door for Tega Cay yet. A request from this page goes to the first licensed shop that takes the door.