Seattle / Ferndale
Ferndale has 15,999 residents (give or take 28) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US5323620, checked 2026-10-19), about 2,222 people per square mile.
Ferndale is about 86 miles from the Census center point for Seattle in a straight line and covers 7.201 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).
Of the 5,844 occupied homes in Ferndale, 59% heat with natural gas, 0% 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=160XX00US5323620, checked 2026-10-19).
Gas heats 59% of Ferndale against electricity at 40%, and a cold-climate heat pump sized for this market replaces the gas system outright, so the usual quote is a whole-home install.
Ferndale has about the Whatcom County oil share of 1% and 6 points less electric heat than the county's 46% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US53073, checked 2026-10-19).
Ferndale has 6,200 housing units, 5% built before 1940 and 27% before 1980, with 47% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5323620, checked 2026-10-19).
Ferndale has 6 points fewer pre-1940 homes than Whatcom County as a whole (11%) and 15 points more homes built after 2000 than the county's 32% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US53073, checked 2026-10-19).
The median Ferndale home was built in 1998 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US5323620, 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=160XX00US5323620, checked 2026-10-19).
64% of Ferndale homes are single-family detached, 9% are in two- to four-unit buildings and 17% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US5323620, checked 2026-10-19).
32% of Ferndale homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US5323620, checked 2026-10-19), so beside the 64% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
47% of Ferndale housing was built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5323620, 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 Ferndale on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
PSE heat pump rebates (electric resistance to ASHP conversion), run by Puget Sound Energy, is a live program for Washington addresses and covers qualifying equipment at $2,400 per system (registry row 14 verified 2026-10-14, https://www.pse.com/en/rebates/heating/electric-resistance-to-air-source-heat-pump-conversion-rebate, checked 2026-10-16); confirm eligibility for the Ferndale address before counting it. With 40% of Ferndale homes already on electric heat and 60% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Seattle City Light heat pump instant discounts, run by Seattle City Light, is a live program for Washington addresses and lists a standard figure of $300 (registry row 47 verified 2026-10-16, https://seattle.gov/city-light/residential-services/home-energy-solutions/heating-and-cooling-your-home, checked 2026-10-16); confirm eligibility for the Ferndale address before counting it.
Seattle Clean Heat Program (oil to heat pump), run by City of Seattle Office of Sustainability and Environment, is a live program for Washington addresses and lists a standard figure of $2,000 (registry row 48 verified 2026-10-14, https://seattle.gov/environment/climate-change/buildings-and-energy/seattles-clean-heat-program, checked 2026-10-16); confirm eligibility for the Ferndale address before counting it.
Median household income in Ferndale is $87,579 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US5323620, 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: 23F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Whatcom County row, 99% heating, PDF pages 133 to 135 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 23F figure is the Whatcom County cold-day number a Ferndale heat pump is sized against, so ask the installer to show the system's heating output at 23F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 59% of Ferndale 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 Ferndale home has 5.3 rooms and was built around 1998, 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 Ferndale. The public number is the number the contractor quotes from.
No local contractor is named on this door for Ferndale yet. A request from this page goes to the first licensed shop that takes the door.