Buildings ยท Analysis
San Francisco's gas ban, one cycle in
The city electrified new construction first. What the first compliant buildings cost, which exceptions got granted, and how the rule starts reaching the home you already live in.
I. What the reach code actually requires
If you are pulling a permit for a new home, a backyard cottage, or a small apartment building in San Francisco this fall, the gas line is not really on the table. The city's all-electric requirement for new construction has been in force for a few years now, and the permit counter treats a gas hookup as the exception you have to argue for, not the default you get by asking. That is a real change from how the Sunset and the Mission got built, where a furnace in the basement and a water heater in the closet were simply assumed.
A reach code is a local building rule that goes past the statewide minimum (California sets a floor with its energy code, and cities are allowed to reach beyond it). San Francisco's version, adopted by the Board of Supervisors in 2020, requires most new construction to be all-electric, meaning no natural gas piping to the building, for permit applications filed on or after mid-2021, per the city ordinance. In plain terms that means heat pumps for space and water heating, an induction or electric range, and a larger electrical panel to feed it all. The rule rides on top of California's Title 24 energy code, which the state updates every few years and which has itself been nudging new buildings toward heat pumps, so a builder here is really meeting two rules at once.
II. The honest math on the first buildings
The cleanest thing to say about cost is that nobody has a tidy, checkable number for what all-electric adds to a San Francisco project, and you should distrust anyone who quotes one to the dollar. New construction skips the expensive part of electrification, which is tearing gas lines out of a finished wall. When there was never a pipe to run, the builder saves the cost of the gas line, the meter, and the trenching, and spends instead on heat pump equipment and panel capacity. State and national-lab studies have generally found new all-electric homes cost about the same or a little less to build than mixed-fuel ones, though the range is wide and leans heavily on the specific project.
Operating cost is the number a ratepayer actually feels, and here the fog helps. The city barely needs air conditioning, and heat pumps run efficiently in San Francisco's mild, damp climate, so heating a well-built new unit draws modest power. The catch is the price of that power. If your building takes service from CleanPowerSF or Hetch Hetchy Power, both run by the SFPUC, your rate and generation mix differ from a straight PG&E bundle, and PG&E still delivers the electricity over its wires either way. It depends on your address, and the honest move is to model your own block rather than trust a citywide average.
III. The exceptions, and the wave reaching existing buildings
The ordinance was never absolute. Commercial kitchens got the most visible carve-out: restaurants could keep gas cooking equipment where an all-electric setup was shown to be infeasible, a nod to chefs and to the city's food economy. Beyond that, the city can grant infeasibility exceptions where electric service genuinely cannot be provided, which in practice has meant a small share of projects rather than a flood. The exceptions are real but narrow, written to protect edge cases, not to leave a lane open for anyone who simply preferred gas.
The bigger story is the building you already own. The Bay Area Air Quality Management District adopted rules in 2023 to phase out sales of new gas-burning furnaces and water heaters over roughly the next several years, on a schedule the district has published and is still refining. That is the mechanism that eventually reaches existing homes: not a ban on your working furnace, but a point down the road when the replacement you buy has to be electric. For the Victorian flats and stucco rowhouses that define the city, that is the retrofit question, and it is only starting to land on kitchen tables.
IV. Worth watching this month
1. The Bay Area Air Quality Management District's appliance rules phase in over the coming years, so it is worth checking the district's own site for the current compliance dates, since some of the early ones fall within this decade and could shift.
2. San Francisco's building permit data, published by the city, is where you can see roughly how many new projects are filing as all-electric, a routine dataset that quietly shows how the rule is landing.
3. The California Energy Commission's next Title 24 energy code cycle continues its push toward heat pumps, and its public workshops are the honest early signal of where the statewide floor moves next.
4. CleanPowerSF and Hetch Hetchy Power rate changes at the SFPUC set what electric heating actually costs here, and the agency posts rate updates and board meeting dates as they come.
5. Any SFPUC or city announcement about performance standards for existing buildings is the one to watch closely, because that is where the real fight over retrofits will show up.
Frequently asked questions
Does the rule mean I have to rip out my gas stove?
No. The ordinance applies to new construction, not to existing buildings, so your current gas range, furnace, and water heater are untouched. The change for existing homes will come later, and mostly at the moment you replace an appliance.
Can restaurants still cook with gas in new buildings?
In many cases, yes. The city wrote an exception for commercial food service where an all-electric kitchen is shown to be infeasible. It is a carve-out with conditions, not a blanket pass.
Is all-electric more expensive to build?
For new construction, usually not by much, and sometimes less, because there is no gas line, meter, or trenching to pay for. The exact figure varies widely by project, so treat any single dollar number with suspicion.
Who supplies the electricity for these buildings?
Most San Francisco customers are served by CleanPowerSF or Hetch Hetchy Power, both run by the SFPUC, with PG&E delivering the power over its lines. Your rate and generation mix depend on which program serves your address.
References
- City and County of San Francisco (sf.gov), The city's official site, where the all-electric new construction ordinance and permit guidance for builders are published., www.sf.gov.
- California Energy Commission, Building Energy Efficiency Standards (energy.ca.gov), The state agency page for the Title 24 energy code that sets the statewide floor the city reaches beyond., www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards.
- Bay Area Air Quality Management District (baaqmd.gov), The regional air regulator, with the zero-emission appliance rules that will reach existing furnaces and water heaters over the coming years., www.baaqmd.gov.
- CleanPowerSF, SFPUC, The city's community choice electricity program, where you can check rates and generation mix for a San Francisco address., www.cleanpowersf.org.
- San Francisco Department of the Environment, City program pages on building electrification and what the all-electric requirement means for residents and contractors., sfenvironment.org.