Heat pump water heaters in the Bay Area: cost and rebates in 2026

San José Clean Energy pays $2,500 for a heat pump unit that replaces a gas water heater, or $3,500 in environmental justice areas. Each rises by $500 for September 1 to October 31, 2026. The application must be approved before installation begins, the tank must hold 40 gallons or more, and a final permit is required.

San José Clean Energy accepts any contractor without labor violations filed with the state in the last 3 years, and self-installed units. The rebate check can go to the contractor if the claim names them.

Silicon Valley Clean Energy pays $2,500 for replacing a gas water heater, or $3,500 for income-qualified customers, and announces $500 extra from September to October 2026. It asks owners to apply before the appliance is installed.

WestLight Energy, formerly Peninsula Clean Energy, offers up to $4,000 for installs completed September 1 to October 31, 2026, which it says is $500 more than its standard rebate.

WestLight Energy accepts any contractor and self-installed units. The application is due within 90 days of installation, with the final invoice and the city permit. The rebate goes to the customer unless the application names the contractor as payee.

CleanPowerSF credits $1,200 for a heat pump water heater, paid as $50 a month on the bill for 24 months. Funding is first-come, first-served.

CleanPowerSF also requires an electrification rate such as E-ELEC and compliance with the permit rules of the Department of Building Inspection.

MCE listed a rebate of up to $3,175 through a contractor from its own list, for owners who have lived in their single-family home for at least 12 months. This is the version of May 2026.

TECH Clean California single-family heat pump water heater incentives have been fully reserved since November 14, 2025, and take no new reservations.

HEEHRA single-family rebates have been fully reserved statewide since February 24, 2026. Requests not yet approved are on hold in case budget returns. The single-family rebate was for heat pump heating and cooling systems.

The federal energy efficient home improvement credit covers improvements made through December 31, 2025. Its cap for heat pumps and water heaters was $2,000 per year.

Air District Rule 9-6: the Board considers changes on November 4, 2026 that would add exemptions and extend the compliance date. Public comment closes November 1 at 6 PM.

The proposal moves the zero-NOx date for water heaters up to 75,000 BTU per hour from January 1, 2027 to January 1, 2028. An exemption certificate is needed before installation, once per address, for example for enclosed spaces under 700 cubic feet that cannot be vented, garages with ceilings under 7.2 feet, service under 100 amps, or a new 240-volt connection that needs more than 50 feet of conduit.

San José requires both a plumbing and an electrical permit for a heat pump unit. The room needs at least 700 cubic feet, or a door with a louvered panel of at least 2 by 3 feet. Condensate must drain to an approved plumbing fixture or a drywell.

The C-36 plumbing license covers installing any type of equipment that heats water.

Space and air. ENERGY STAR advises a spot that stays between 40 and 90 degrees F all year with 1,000 cubic feet of air around the unit, and notes that the unit cools the space it stands in.

A bigger, taller tank. The Air District staff report says heat pump units are often upsized by 10 to 15 gallons over a gas heater because they recover slower, and are a bit taller, so a closet or a low basement may not fit them.

Fixes to the space. Palo Alto program data in the same report: vents such as louvered doors averaged $208, at most $1,701. Moving the heater or reworking the space averaged $1,287, at most $4,540.

Power. A standard unit runs on 240 volts and 30 amps, which can mean new wiring and a bigger panel. A 120-volt unit plugs into a standard wall socket and needs no new circuit.

Panels. The staff report estimates that at least 44 percent of single-family homes in the Bay Area have 200-amp panels and could switch without a bigger panel.

Running cost. The Air District analysis puts the yearly utility saving of a single-family switch from a gas tank at about $51.

Rate plan. Silicon Valley Clean Energy reports first-year savings of $300 to $400 when the gas unit goes and the home moves to an electrification-friendly rate.

Placement. Ava Community Energy lists electrical requirements, space, ventilation, noise and permits as the points to check before installing.

Model number, tank size in gallons, 120 or 240 volts, and why that size.

Electrical scope: new circuit, breaker space, panel or subpanel work, and the load calculation.

Where the unit goes: room volume, louvered door or duct, and whether it has to move.

Condensate drain route, seismic straps, expansion tank and drain pan.

Plumbing and electrical permits: who pulls them, and whether the fees are in the price.

Gas line cap and haul-away of the old heater.

Rebate: which program, the amount the price assumes, who applies, before or after the install, and who receives the payment.

Warranty in years for the unit and for labor, and how long the house is without hot water.