St. Louis / Webster Groves
Webster Groves has 23,712 residents (give or take 27) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US2978154, checked 2026-10-19), about 4,010 people per square mile.
Webster Groves is about 7 miles from the Census center point for St. Louis in a straight line and covers 5.913 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 Webster Groves that is 63119 (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).
4,010 people per square mile puts Webster Groves in suburban density, where the outdoor unit usually sits in a side yard and the noise is not an issue for neighbors.
Of the 9,446 occupied homes in Webster Groves, 79% heat with natural gas, 0% with heating oil, 20% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US2978154, checked 2026-10-19).
Gas heats 79% of Webster Groves against electricity at 20%, 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.
Webster Groves has about the St. Louis County oil share of 0% and 3 points less electric heat than the county's 23% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US29189, checked 2026-10-19).
Webster Groves has 9,921 housing units, 35% built before 1940 and 80% before 1980, with 5% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2978154, checked 2026-10-19).
Webster Groves has 25 points more pre-1940 homes than St. Louis County as a whole (10%) and 6 points fewer homes built after 2000 than the county's 11% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US29189, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Webster Groves home was built in 1952 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US2978154, checked 2026-10-19) and the median home has 6.6 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US2978154, checked 2026-10-19).
79% of Webster Groves homes are single-family detached, 2% are in two- to four-unit buildings and 18% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US2978154, checked 2026-10-19).
With 79% detached houses and 2% in small multi-family buildings, a Webster Groves quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 24% of Webster Groves homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US2978154, checked 2026-10-19), the landlord signs the quote in many of them.
Webster Groves has 7 points more detached houses than St. Louis County overall (72%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US29189, checked 2026-10-19).
35% of Webster Groves homes were built before 1940 and 80% before 1980 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US2978154, checked 2026-10-19), so insulation is the first sizing question: an older home leaks more heat per square foot, and the installer runs a room-by-room heat-loss calculation to size the system for what the walls and windows actually hold in, not just the floor plan.
No electric utility is on file for Webster Groves 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 Webster Groves is $115,227 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US2978154, 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: 2F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), St. Louis County row, 99% heating, PDF pages 68 to 73 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 2F figure is the St. Louis County cold-day number a Webster Groves heat pump is sized against, so ask the installer to show the system's heating output at 2F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 79% of Webster Groves on gas and 20% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; a Webster Groves house from before 1940 (35% of the 9,921 units) rarely matches a square-footage rule of thumb.
The form on this page is the follow-up for Webster Groves. The public number is the number the contractor quotes from.
No local contractor is named on this door for Webster Groves yet. A request from this page goes to the first licensed shop that takes the door.