Trade the Ash Bucket for a Flip of a Switch.

Most gas fireplace installations in Brentwood run $4,000 to $9,500, depending on the unit, the venting path, and whether new gas line work is required. Converting an existing masonry fireplace to a direct-vent gas insert—the most common project in Brentwood's older bungalows—tends to land on the lower end, especially in homes already piped for gas through Spire. New construction or a built-in gas fireplace added where none existed before, requiring framing and a fresh gas line run, sits toward the higher end. A local installer will give you a firm number after seeing your chimney and gas meter location.

Yes, and it's the single most common gas project in Brentwood. Many of the brick ranches and bungalows built here in the 1940s through 60s came with a wood-burning masonry fireplace that's rarely used today. A gas insert typically slides into that existing firebox, uses the chimney as a venting path with a liner, and connects to your home's existing gas service. Expect $4,000 to $8,500 depending on the insert model and whether the gas line needs to be extended from the meter to the fireplace. Since most Brentwood blocks already have Spire gas service at the curb, this is usually a straightforward hookup rather than a major utility project.

Nearly every home in Brentwood has access to natural gas through Spire, so propane is rarely necessary here—it's mostly used for detached structures like a pool house or a garage-conversion space that sits far from the existing gas line. If your home already has a gas water heater or furnace, adding a fireplace onto that same line is typically the simplest and least expensive path. Your installer can confirm line capacity and, if needed, size a new branch off the meter.

Most direct-vent gas fireplaces with intermittent pilot ignition (IPI) include a battery backup—typically a set of AA batteries built into the unit—so the fireplace still lights and runs the blower during an outage. St. Louis-area storms occasionally knock out power for a day or more, so this matters. Valor fireplaces take a slightly different approach: their pilot assembly generates its own electricity through a thermocouple, so there's no battery to remember at all. Ask your local dealer which ignition system a given model uses before you buy.

A gas insert is built to drop into an existing masonry firebox—the right call for most Brentwood bungalows and ranches with an original wood-burning fireplace. A gas fireplace is a fully built-in unit for new construction or a remodel where no chimney exists. A gas stove is a freestanding cast-iron or steel unit that sits on a small hearth pad and vents through a wall or roof—useful in additions, basements, or smaller rooms where a full fireplace isn't practical on a tight lot. A local dealer can walk your space and tell you which fits your floor plan.

Yes. The City of Brentwood Building Department requires a building permit for the fireplace installation and a separate gas line permit if new gas piping is being run, and the gas work itself has to be done by a licensed gas-fitter. Most established hearth dealers in the St. Louis area handle both permits as part of the installation, coordinating inspection with the city so you're not left managing separate trades yourself.

Vented (direct-vent) gas fireplaces pull combustion air from outside and exhaust it back outside through sealed venting—they're the standard choice and work in virtually any room size. Vent-free units burn gas directly into the room without external venting; Missouri permits them, but they come with strict room-volume requirements and oxygen depletion sensors, and they're a tougher fit in the smaller, tightly built rooms common in Brentwood's older homes. For most projects here, a direct-vent unit is the safer, more flexible choice, and it's what the majority of local dealers install and recommend.

Plan on an annual inspection, ideally before the start of the heating season. A technician checks the burner, pilot assembly, gas connections, and venting, and cleans the glass. This is a much smaller job than chimney sweeping for a wood-burning unit, but it matters just as much for safe operation—local service providers typically charge $150 to $225 for a standard annual visit.

Brentwood's small, closely built lots make wood storage and burning impractical for most households—there's often no room for a cord of stacked oak or hickory, and burning close to neighboring homes on narrow city lots draws complaints even where it's technically allowed. That's part of why wood stoves and pellet appliances are rare here compared to the surrounding rural counties, while gas conversions of existing masonry fireplaces have become the default upgrade. If you already have that original wood-burning firebox from when the house was built, a gas insert lets you keep the look without the wood handling or storage headache.

Yes—with an asterisk. Fireplaces are hot and TVs don't like heat. Either put a mantel between them to deflect rising warmth, or choose a fireplace with heat-management technology that creates a cool zone on the wall above—the wall stays around 125 degrees, barely warm, while the room still gets full heat. If you like clean lines and don't want a mantel, heat management is the answer.

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.

Yes—by creating a comfort zone. A furnace heats every square foot of the house just to warm the one room you're in; a gas fireplace on low burns roughly a sixth of the gas a typical furnace does. Set the furnace around 55–60 degrees as a baseline, then heat the rooms your family actually uses. Families who heat this way commonly save $20–$60 a month.