Keep Your Family Warm and Safe—No Matter What

New, open-hearth wood-burning fireplaces are banned outright in new construction under BAAQMD Regulation 6, Rule 3, which applies across San Mateo County and the rest of the Bay Area. If your home has an existing masonry fireplace, you can typically retrofit it with an EPA 2020 NSPS-certified wood stove or insert, permitted through the South San Francisco Building Division. Building a brand-new wood fireplace from scratch, though, effectively isn't an option here anymore.

Because wood-burning appliances are uncommon on the Peninsula, pricing runs close to general California averages: expect somewhere around $5,000 to $9,000 for an EPA-certified insert into an existing masonry chimney, including a stainless liner and labor. Fewer Bay Area hearth dealers stock wood units compared to gas, so plan on a slightly longer search to find a shop that carries and installs them well.

BAAQMD calls a Winter Spare the Air alert on days when fine particulate pollution is forecast to spike, typically between November and February. On alert days, burning wood, manufactured fire logs, or pellets is illegal in any fireplace or wood stove in South San Francisco, including EPA-certified models, unless that device is registered as your home's sole source of heat. Violations carry fines starting around $100 and climbing for repeat offenses. Check the BAAQMD website before lighting a fire anytime between late fall and late winter.

Mostly climate. Winter lows here average 44°F and the city has a mild, short heating season—compare that to a genuinely cold city like Bozeman, Montana, which sees more than triple the winter heating load. Central gas furnaces and heat pumps comfortably handle the Peninsula's mild, foggy winters without needing a wood stove's high heat output. Combine that with BAAQMD's restrictions and most South San Francisco homes were simply never built with a wood-burning fireplace in mind.

Yes, and this is the most common path for wood in South San Francisco. If the masonry chimney is structurally sound, a certified installer can line it and fit an EPA 2020 NSPS-certified wood insert, pulling a permit through the South San Francisco Building Division. You'll still be subject to BAAQMD's Winter Spare the Air curtailment rules on high-pollution days, so it works best as supplemental or backup heat rather than your primary source.

Oak, madrone, and Douglas fir are the species most commonly sold by Bay Area and Peninsula firewood suppliers, and all three season well and burn hot. There's no national forest cutting-permit program nearby the way there is in the Sierra or the Cascades, so nearly all firewood burned in South San Francisco is purchased by the cord from regional suppliers rather than self-cut.

Pellet stoves are exempt from BAAQMD's Spare the Air curtailment because they burn more cleanly and consistently than cordwood, which is a real advantage locally. That said, pellet heat is about as niche in South San Francisco as wood—the mild climate doesn't demand supplemental heat the way a colder region would, and pellet stoves still need electricity to run the auger and blower, so they're not a power-outage backup either. Most homeowners weighing either fuel here are after ambiance or occasional backup, not primary heat.

For most South San Francisco homes, yes. Gas fireplaces run on natural gas service that's already standard across the city, and electric units plug into existing wiring—both sidestep BAAQMD's wood-burning restrictions entirely. PG&E's residential rate here runs about $0.317 per kWh, high enough that a gas fireplace is usually the more efficient choice for real heating needs, with electric units reserved mostly for ambiance in rooms without gas access. Wood is worth pursuing specifically if you want the experience of a real fire or heat that doesn't depend on the grid or gas main.

Gas wins on convenience and compliance: instant on-off operation, no Spare the Air restrictions, no chimney maintenance, and it fits the city's mild heating needs without any fuss. Wood wins only in a narrow set of cases—homes with an existing masonry fireplace where the owner wants the look and feel of a real fire, or households that want a stove specifically as off-grid backup heat during a PG&E outage. Given the climate and the air district's rules, most South San Francisco homeowners who install a hearth appliance choose gas; wood tends to be a deliberate, secondary choice rather than the default.

An insert does two things: it seals the chimney completely, so you stop losing air you already paid to heat, and it radiates warmth into the room through the firebox and glass. Most add a heat-exchange fan that pulls cool room air underneath, wraps it around the hot firebox, and pushes it back out warm. Your home is more efficient before you've even lit the first fire.

Open fireplaces suck—literally. As the fire burns, it consumes air your furnace already paid to heat and pulls it out through the chimney, so the house is actually colder after the fire goes out than before you lit it. An insert fixes this: it seals the chimney, puts fixed glass across the front, and turns that hole in your house into a real heat source.

For an average home—covering the fireplace, the vent pipe, and basic installation—a budget between $3,900 and $5,500 gives you a lot of options across wood, gas, and pellet. By the time you add finish work, gas line, and electrical, the average complete installation lands between $5,000 and $12,000 all-in. In a remodel or new build, a good rule is to put about 2.5% of the total project cost toward the fireplace.

On average, a fireplace adds back to the home about the same amount you spent installing it. Add the monthly savings from heating the rooms you actually use instead of the whole house—often hundreds of dollars a year—and the value case is strong before you even count what a fire does for how your family uses the room.