Keep Your Family Warm and Safe—No Matter What

Existing wood-burning fireplaces are legal to keep and use, but the Bay Area Air Quality Management District's Regulation 6, Rule 3 bans installing any new wood-burning fireplace in new construction or major remodels anywhere in Santa Clara County. The only new wood-burning devices permitted are EPA-certified stoves or inserts installed as a direct replacement for an older, uncertified appliance in an existing home. For nearly every other project in Los Altos, homeowners end up looking at gas or electric instead.

No. BAAQMD's rules specifically prohibit new wood-burning fireplace installations in new construction and substantial remodels within Santa Clara County, Los Altos included. Building departments in the area will not permit a new wood-burning unit under these circumstances. If the ambiance of a real fire matters to you, most local dealers will steer new-construction clients toward a direct-vent gas fireplace instead, which has no such restriction and installs cleanly during framing.

The Bay Area Air Quality Management District issues Winter Spare the Air alerts on days when particulate pollution is forecast to be high, typically during cold, still stretches in December and January. On those days, burning wood in any fireplace, stove, or insert is illegal countywide, including in Los Altos, with fines for violations reported through the district's Check Before You Burn program. A limited exemption exists for households where a wood-burning device is the sole source of heat, which is uncommon in Los Altos given how few homes rely on wood as primary heat.

You have two realistic paths. The first is an EPA-certified wood-burning insert, which BAAQMD allows as a device replacement if you're swapping out an older, uncertified fireplace or stove - a local certified installer can confirm eligibility. The second, and far more common choice among Los Altos homeowners, is converting the same masonry opening to a direct-vent gas insert, which uses your existing chimney as a vent chase, skips the burn-ban restrictions entirely, and gives you heat on demand. Given the mild climate and strict local air rules, most dealers here will walk you through the gas option first.

Oak, madrone, and Douglas fir are the species most commonly sold and burned by the smaller number of Los Altos and Santa Clara County households that keep a wood-burning appliance running - typically older homes in Los Altos Hills with a legacy fireplace, or households using it for occasional ambiance outside of Spare the Air days. Oak in particular is prized for its long, hot burn and is widely available from regional firewood suppliers serving the South Bay.

Yes. Los Altos sits close enough to the Santa Cruz Mountains that wildfire smoke has become a regular late-summer and fall concern, and the broader Bay Air Basin is already classified as a non-attainment area for fine particulate matter. Adding wood smoke on top of wildfire smoke during an already bad air season is part of why the district treats residential wood burning so strictly here, and why several local installers now actively recommend gas or electric alternatives for indoor air quality reasons alone.

Not in any way that matters here. PG&E's residential electric rate in Los Altos runs about $0.317 per kWh - among the highest in the country - which makes electric resistance heat expensive to run around the clock. But because winter lows only average around 42 degrees and the heating season is short, most Los Altos homes simply don't burn enough fuel of any kind, wood included, for the cost-per-BTU argument to drive the decision the way it would in a colder climate like Duluth, MN. The choice here tends to come down to ambiance, air quality rules, and resale considerations rather than fuel economics.

Direct-vent gas fireplaces and inserts are by far the most common choice, since natural gas service is well established across Los Altos and a gas unit sidesteps BAAQMD's new-construction ban entirely. Electric fireplaces are the second most common pick, especially in secondary rooms or homes where no gas line is nearby - though at PG&E's current residential rate, most owners use them for supplemental or ambiance heat rather than as a primary source.

Start with whether you have an existing, uncertified wood-burning fireplace or stove - if so, an EPA-certified retrofit insert installed as a device replacement is your legitimate path under BAAQMD rules, and it burns dramatically cleaner and more efficiently than an old open masonry hearth. A trusted local installer will confirm your eligibility, pull the correct permits, and make sure the unit qualifies before you buy anything. If you don't have an existing wood-burning device, new installation isn't on the table in Los Altos, and it's worth having that direct conversation with a local dealer before falling in love with a floor model.

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.

An insert is a fireplace that slides into a pre-existing wood-burning fireplace—if you don't have one, there's nothing to insert it into. A zero-clearance fireplace is built into a framed wall, which makes it the answer for remodels and new construction. Simple test: existing masonry fireplace means insert; blank or framed wall means zero-clearance.

It's a visit where a hearth professional measures your space, confirms the model you picked actually works in your home, and walks the specs—framing, gas line, venting, finish work—before anything is ordered. Some details you just can't know until you see the house. Never make a down payment without one; it's the single most-skipped step that burns buyers.

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.