San Francisco / Berkeley
Berkeley has 120,257 residents (give or take 59) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US0606000, checked 2026-10-19), about 11,528 people per square mile.
Berkeley is about 41 miles from the Census center point for San Francisco in a straight line and covers 10.432 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 Berkeley that is 94702, 94703, 94704, 94705, 94707, 94708, 94709, 94710 and 1 more (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 Berkeley is $108,092 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US0606000, 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.
At 11,528 people per square mile, Berkeley is dense enough that noise setback rules and outdoor-unit placement on a small lot are the first questions the installer works through.
40% of Berkeley homes are single-family detached, 18% are in two- to four-unit buildings and 38% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US0606000, checked 2026-10-19).
56% of Berkeley homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US0606000, checked 2026-10-19), so beside the 40% detached houses there is a real share of jobs where the landlord, not the resident, signs the quote.
Berkeley has 11 points fewer detached houses than Alameda County overall (51%) (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US06001, checked 2026-10-19).
56% of Berkeley homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US0606000, checked 2026-10-19), so the market splits between resident-led jobs where the occupant picks the system and landlord-led jobs where they do not, and the rebate paperwork differs.
Of the 47,135 occupied homes in Berkeley, 68% heat with natural gas, 0% with heating oil, 27% with electricity and 1% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US0606000, checked 2026-10-19).
Gas heats 68% of Berkeley against electricity at 27%, and a cold-climate heat pump sized for this market replaces the gas system outright, so the usual quote is a whole-home install.
Berkeley has about the Alameda County oil share of 0% and 3 points less electric heat than the county's 30% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US06001, checked 2026-10-19).
No electric utility is on file for Berkeley on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
LADWP Consumer Rebate Program heat pump HVAC, run by LADWP, is a live program for California addresses and publishes its terms without one headline figure (registry row 24 verified 2026-10-14, https://www.ladwp.com/residential-services/assistance-programs/consumer-rebate-program, checked 2026-10-16); confirm eligibility for the Berkeley address before counting it. With 27% of Berkeley homes already on electric heat and 69% on gas, oil or propane, the row that applies depends on the name on the electric bill and the fuel coming out.
Berkeley has 53,145 housing units, 46% built before 1940 and 81% before 1980, with 11% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US0606000, checked 2026-10-19).
Berkeley has 26 points more pre-1940 homes than Alameda County as a whole (20%) and 4 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=050XX00US06001, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Berkeley home was built in 1944 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US0606000, checked 2026-10-19) and the median home has 4.3 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US0606000, checked 2026-10-19).
46% of Berkeley homes were built before 1940 and 81% before 1980 (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US0606000, 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.
Heating design temperature: 27F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Alameda County row, 99% heating, PDF pages 11 to 13 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 27F figure is the Alameda County cold-day number a Berkeley heat pump is sized against, so ask the installer to show the system's heating output at 27F, not at the milder rating-label temperature.
Ask whether the quote is whole-home or partial-home, because with 68% of Berkeley on gas and 27% already electric the two paths carry different rebate figures and different sizing.
Ask for the heat-loss calculation room by room; a Berkeley house from before 1940 (46% of the 53,145 units) rarely matches a square-footage rule of thumb.
The form on this page is the follow-up for Berkeley. The public number is the number the contractor quotes from.
No local contractor is named on this door for Berkeley yet. A request from this page goes to the first licensed shop that takes the door.