Trenton / Pennington
Pennington is about 7 miles from the Census center point for Trenton in a straight line and covers 0.961 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).
Pennington has 2,827 residents (give or take 26) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US3457600, checked 2026-10-19), about 2,942 people per square mile.
Of the 1,152 occupied homes in Pennington, 69% heat with natural gas, 12% with heating oil, 18% with electricity and 0% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US3457600, checked 2026-10-19).
Pennington has 6 points more oil heat than Mercer County as a whole, where 6% of homes burn oil, and 1 points less electric heat than the county's 19% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US34021, checked 2026-10-19).
Gas heats 69% of Pennington against electricity at 18%, 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.
The median Pennington home was built in 1953 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US3457600, checked 2026-10-19) and the median home has 7 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US3457600, checked 2026-10-19).
Pennington has 1,250 housing units, 36% built before 1940 and 71% before 1980, with 8% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US3457600, checked 2026-10-19).
Pennington has 18 points more pre-1940 homes than Mercer County as a whole (18%) and 7 points fewer homes built after 2000 than the county's 15% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US34021, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
36% of Pennington homes were built before 1940 and 71% before 1980 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US3457600, 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.
70% of Pennington homes are single-family detached, 7% are in two- to four-unit buildings and 13% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US3457600, checked 2026-10-19).
With 70% detached houses and 7% in small multi-family buildings, a Pennington quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 18% of Pennington homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US3457600, checked 2026-10-19), the landlord signs the quote in many of them.
Pennington has 22 points more detached houses than Mercer County overall (48%) and 10 points fewer five-plus-unit buildings than the county's 23% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US34021, checked 2026-10-19).
No electric utility is on file for Pennington on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
JCP&L Clean Comfort (residential building decarbonization), run by JCP&L, is a live program for New Jersey addresses and covers qualifying equipment at $7,500 per system (registry row 8 verified 2026-10-15, https://www.neifund.org/wp-content/uploads/2026/04/0925_JCPL_Res_Bldg-Decarb_5860532_FRM_Rebate-Application_2025.pdf, checked 2026-10-16); confirm eligibility for the Pennington address before counting it. With 18% of Pennington homes already on electric heat and 81% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Median household income in Pennington is $192,586 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US3457600, 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: 6F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Mercer County row, 99% heating, PDF pages 81 to 82 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 6F figure is the Mercer County cold-day number a Pennington heat pump is sized against, so ask the installer to show the system's heating output at 6F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 69% of Pennington on gas and 18% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; a Pennington house from before 1940 (36% of the 1,250 units) rarely matches a square-footage rule of thumb.
The form on this page is the follow-up for Pennington. The public number is the number the contractor quotes from.
No local contractor is named on this door for Pennington yet. A request from this page goes to the first licensed shop that takes the door.