Instant warmth for St. Louis County's raw January nights.

Costs vary with the project. Converting an existing masonry fireplace to a direct-vent gas insert—using the chimney you already have with a stainless liner—typically runs on the lower-to-middle end of the market, especially in homes that already have a gas line nearby from a furnace or water heater. A new built-in gas fireplace for a remodel or an addition in newer subdivisions like Chesterfield or Wildwood, where framing and venting have to be built from scratch, sits higher. Because St. Louis County is split across dozens of municipalities, permitting timelines and fees can shift depending on whether you're in unincorporated county land or an incorporated city like Kirkwood or Clayton—a local dealer who works across the metro will know the difference and quote accordingly.

Yes, and it's one of the most common projects in the county's older neighborhoods. Homes in Webster Groves, Kirkwood, and University City frequently have a masonry fireplace original to the house that's gone unused for years—often because splitting and stacking cordwood doesn't fit a smaller suburban lot, even with plenty of local oak, hickory, and walnut available regionally. A direct-vent gas insert reuses your existing masonry opening and chimney with a liner, so you keep the look of the original fireplace while gaining real, thermostatic heat. Homes already on Spire's gas network are the simplest conversions since a line is often already close by.

Most of St. Louis County sits within Spire's natural gas service territory, so if your home already has gas appliances—a furnace, water heater, or range—adding a fireplace is usually a straightforward tie-in. Propane comes into play mainly in the county's more rural fringes or in newer developments still waiting on gas main extensions. Either fuel works with most modern fireplace models; your installer sets the orifice and regulator for whichever you have.

Most modern gas fireplaces will, which matters in a county that sees its share of spring severe weather and outages. Units with IPI (intermittent pilot ignition) run on battery backup and light on demand even with the power out—just remember to keep fresh batteries in the unit. Valor takes a different approach: their fireplaces generate their own electricity through the pilot's thermocouple, so there's no battery to forget at all. If losing heat during a spring storm outage is a real concern for your household, ask your local dealer specifically about ignition type when comparing units.

A gas fireplace is a fully built-in unit, framed into a wall—the right call for new construction or a remodel that doesn't already have a fireplace opening. A gas insert is built to drop into an existing masonry fireplace, which describes a huge share of the older housing stock across Kirkwood, Webster Groves, and Florissant. A gas stove is a freestanding unit that sits out on the floor like a classic wood stove but runs on gas—a good fit for a room without any existing chimney or fireplace opening. For most St. Louis County homeowners with a fireplace already in the house, an insert is the simplest and most common answer.

Almost certainly, though exactly who issues it depends on where you live. St. Louis County is made up of close to 90 separate municipalities, and each incorporated city—Clayton, Kirkwood, Chesterfield, and others—runs its own building department with its own permit process, while unincorporated areas go through the county. Gas line work also requires a licensed gas-fitter. A dealer who regularly installs across the metro will already know which office to file with in your particular municipality, which saves real time compared to sorting it out yourself.

Vented gas fireplaces (direct-vent or B-vent) pull combustion air from outside and exhaust it back outside through sealed venting—the cleanest, most universally code-compliant option. Vent-free (ventless) fireplaces burn directly into the room without external venting; they're legal in Missouri but come with strict room-sizing rules and oxygen-depletion sensors, since combustion byproducts stay indoors. With no air quality restrictions on the books in St. Louis County, both options are on the table, but direct-vent units remain the more common recommendation for full-time heating use since they don't ask you to trade off indoor air quality for efficiency.

Plan on an annual inspection, ideally in early fall before the county's first real cold snap. A technician checks the burner, pilot assembly, venting, and gas connections, and cleans the glass and interior—a much lighter lift than chimney sweeping for a wood-burning unit, but just as important for safety. Gas service providers working across the St. Louis metro typically charge in the $150–$250 range for a standard annual visit.

For most homeowners here, realistically no—not because winters are too mild, but because wood heat doesn't fit well into how the county is built. Dense suburban lots leave little room for stacked cordwood, most municipalities don't make it easy to add a new solid-fuel appliance, and there's no working cutting-permit or public-land firewood culture the way there is in more rural, forested counties. Regional hardwoods like oak, hickory, walnut, and maple are plentiful, but they mostly show up as furniture and flooring, not firewood stacks. If you've got an existing masonry wood fireplace, the far more common local move is converting it to a gas insert rather than adding new wood-burning equipment—you keep the fireplace, lose the ash and chimney upkeep, and gain heat you can turn on with a switch.

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.

If you're putting a fire in your house on purpose, it's best to work with an expert. Unless you're genuinely experienced in framing, gas line, vent pipe, and the national code on clearances to combustibles, have a professional do it—and ideally the same company that sells you the fireplace, so warranty, service, and liability all live under one roof.

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.