Charleston / Hilton Head Island
Hilton Head Island has 37,911 residents (give or take 43) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US4534045, checked 2026-10-19), about 917 people per square mile.
Hilton Head Island is about 63 miles from the Census center point for Charleston in a straight line and covers 41.353 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 Hilton Head Island that is 29926, 29928 (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 Hilton Head Island is $94,657 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US4534045, 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.
47% of Hilton Head Island homes are single-family detached, 8% are in two- to four-unit buildings and 34% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US4534045, checked 2026-10-19).
21% of Hilton Head Island homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US4534045, checked 2026-10-19), so beside the 47% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Hilton Head Island has 17 points fewer detached houses than Beaufort County overall (64%) and 17 points more five-plus-unit buildings than the county's 17% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US45013, checked 2026-10-19).
Of the 18,326 occupied homes in Hilton Head Island, 3% heat with natural gas, 0% with heating oil, 93% with electricity and 3% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US4534045, checked 2026-10-19).
Electricity already heats 93% of Hilton Head Island homes, ahead of gas at 3%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Hilton Head Island has about the Beaufort County oil share of 0% and 13 points more electric heat than the county's 80% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US45013, checked 2026-10-19).
No electric utility is on file for Hilton Head Island on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Hilton Head Island has 30,112 housing units, 0% built before 1940 and 24% before 1980, with 22% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US4534045, checked 2026-10-19).
Hilton Head Island has 26 points fewer homes built after 2000 than the county's 48% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US45013, checked 2026-10-19).
The median Hilton Head Island home was built in 1987 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US4534045, checked 2026-10-19) and the median home has 5.3 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US4534045, checked 2026-10-19).
Heating design temperature: 30F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Beaufort 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 30F figure is the Beaufort County cold-day number a Hilton Head Island heat pump is sized against, so ask the installer to show the system's heating output at 30F, not at the milder rating-label temperature.
Ask for the heat-loss calculation room by room; the median Hilton Head Island home has 5.3 rooms and was built around 1987, 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 Hilton Head Island. The public number is the number the contractor quotes from.
No local contractor is named on this door for Hilton Head Island yet. A request from this page goes to the first licensed shop that takes the door.