Heat pump heating and cooling in the Bay Area: what it costs

Air District Rule 9-4 sets a zero-NOx standard for residential and commercial furnaces from January 1, 2029. It applies in Alameda, Contra Costa, Marin, San Francisco, San Mateo and Santa Clara counties and in parts of Solano and Sonoma. The Air District says only electric appliances meet such standards today.

Replacing only the outdoor unit or only the indoor unit of a heat pump still triggers duct sealing. The installer seals the ducts and an ECC-Rater verifies leakage of 10 percent of system airflow or less, or 7 percent to the outside. If neither target is met, every accessible leak is sealed and checked with a visual inspection and a smoke test.

When a refrigerant part of a heat pump is installed or replaced in an existing house, the refrigerant charge must be field verified in every climate zone. The system then also needs an airflow of at least 300 cfm per ton, or 250 for small duct high velocity systems.

Adding or replacing a refrigerant part also requires a digital setback thermostat.

A split-system heat pump under 65,000 Btu/h must reach at least 14.3 SEER2 for cooling and 7.5 HSPF2 for heating.

A gas furnace cannot be swapped for an electric wall heater. The Energy Commission says the only electric option is a heat pump.

The Governor signed SB 222, the Heat Pump Access Act, on September 28, 2026. It covers permits for heat pump HVAC systems and heat pump water heaters in homes.

As passed by the Legislature, SB 222 calls for one nondiscretionary permit per covered installation, limits on permit fees, inspections without contractor and inspector on site together from July 1, 2027, and online permits issued in real time by July 1, 2028. For expedited permits, the contractor certifies that a load calculation sized the equipment. New homes are not covered.

The federal tax credit of up to $2,000 a year for qualified heat pumps applies to improvements made through December 31, 2025.

Silicon Valley Clean Energy pays $2,000 for a heat pump HVAC system that replaces a gas furnace and $500 when it replaces an electric resistance heater. Income-qualified customers get $3,000 and $1,500.

San José Clean Energy pays $1,500 for a heat pump HVAC system that replaces gas, or $2,500 in environmental justice communities. Ducted and ductless systems qualify, an existing air conditioner is not required, and the system needs a SEER2 of 16 or more. Add-on rebates include $1,000 for a panel upgrade and attic insulation at $0.75 per square foot up to $700.

The C-20 license covers heating, ventilating and air-conditioning systems with their ducts, registers, thermostats and air filters.

Ducts or no ducts. In the Air District study, the median Bay Area single-family project cost $19,263 for a ducted heat pump and $16,073 for a ductless one.

The electrical panel. The same study estimates that 46 to 47 percent of Bay Area single-family homes have a 200 amp panel. It says a bigger panel is not usually needed above 100 amps, and that older homes often have 60 to 100 amps.

What can be reused. This Old House says a swap that reuses ducts, electrical connections and refrigerant lines costs less than one that needs new ducts, electrical upgrades or changes to the structure. Tight attics and crawl spaces add labor.

Size. This Old House warns against installers who size a system by rule of thumb or by the old unit, and points to a Manual J load calculation instead. An oversized system costs more to buy.

Surprises. In the This Old House survey of 2026, heat pump owners reported complications more often than owners of other HVAC systems, such as equipment availability, scope changes, delays and unexpected charges. About 11 percent of those who replaced a heat pump reported permit delays.

Refrigerant. In May 2026 the EPA finalized a rule that removes the January 1, 2026 installation deadline for home heat pumps using refrigerants above 700 GWP, such as R-410A, if they were made or imported before January 1, 2025. Older stock can still show up in a quote.

Age. Fixr gives a lifespan of 10 to 15 years. It says heat pumps made before 2015 may use R-22, a refrigerant no longer sold, which can rule out service.

System type: ducted, single-zone ductless or multi-zone, with model numbers of the indoor and outdoor units, tons, SEER2 and HSPF2.

The Manual J load calculation, in writing, and the size it led to.

Refrigerant type and the manufacture date of the outdoor unit.

Ducts: reused, sealed or replaced, the leakage test, the refrigerant charge check, and who hires the ECC-Rater.

Electrical work: the new circuit, the space left in the panel, and whether a panel upgrade or a load management device is in the price.

Permits: which ones, who applies, and whether the fees are included.

What happens to the gas furnace and its gas line, and who hauls the old equipment away.

Which rebate the price assumes, who files it, and the price if the rebate is not paid.

Warranty in years for the compressor, the other parts and the labor, plus the start date and how many days the house goes without heat.