Instant Warmth for Short Hills's Coldest Nights.

In a town where most homes already have an existing masonry fireplace and gas service at the curb, a straightforward direct-vent gas insert conversion typically runs $5,500 to $9,500, depending on the insert model and whether a new gas line needs to be run from the meter. A full built-in gas fireplace for a renovation or addition—with framing, venting, and a dedicated gas line—usually lands between $8,000 and $14,000. Homes on the older end of Millburn Township's housing stock sometimes need chimney liner work or firebox modifications, which can push costs toward the higher end. A local hearth retailer will give you a firm number after an in-home visit.

Yes—it's the most common gas fireplace project in Short Hills. Many of the town's colonial and Tudor homes have an original masonry, wood-burning fireplace that hasn't actually burned wood in years. A gas insert fits into that existing opening, uses the existing chimney (typically with a stainless steel liner) as the vent path, and is running within a day for most installations. Wood heat has never really been the default in a dense suburb like this—there's no ready source of split oak or hickory nearby and nowhere to store cords of it—so converting to gas is usually the practical choice homeowners land on rather than restoring the fireplace to wood-burning use.

Natural gas service reaches the great majority of homes in Short Hills and greater Millburn Township, with PSE&G as the primary utility for the area. If your home already has gas heat, a water heater, or a gas range, adding a fireplace is usually a simple tap into existing service. Propane is a fallback option mainly for the rare property on the edge of town without a gas main nearby, or for detached structures like pool houses. Most gas fireplace models can be set up for either fuel—your installer configures the correct orifice and regulator for whichever you have.

Most modern gas fireplaces will, with the right ignition system. Units with IPI (intermittent pilot ignition) run on a battery backup, usually AA batteries in the unit itself, that keeps the fireplace lighting on demand when Jersey Central Power & Light service drops—which happens periodically in Short Hills during ice storms and nor'easters. Valor fireplaces take a different approach: their pilot generates its own electricity through the thermocouple, so there are no batteries to maintain at all. If backup heat during outages matters to you, ask your local dealer which ignition system a given model uses before you buy.

A gas insert slides into an existing masonry firebox and uses your current chimney to vent—the right call for most Short Hills homes with an original wood-burning fireplace. A built-in gas fireplace is a fully framed unit for new construction or a renovation where there's no existing masonry opening. A gas stove is a freestanding, cast-iron-look unit that sits out from the wall on its own hearth pad—less common in this market but sometimes used in a sunroom, finished basement, or addition with no chimney at all. For most homeowners here with a colonial-era firebox already in place, the insert is the simplest and most cost-effective route.

Yes. Short Hills is part of Millburn Township, and any new gas fireplace or insert installation requires a permit through the Millburn Township Building Department, along with a licensed gas-fitter for the line work. Most established hearth retailers who work regularly in Essex County handle the permit application and inspection scheduling as part of the installation, so it's rarely something you have to manage yourself.

Vented (direct-vent) gas fireplaces draw combustion air from outside and exhaust it back outside through a sealed pipe—they're the standard choice and code-compliant everywhere, including New Jersey. Vent-free units burn directly into the room without external venting; New Jersey allows them but restricts room size and requires an oxygen depletion sensor, and many local building departments and homeowners in a town like Short Hills tend to steer away from them anyway. For a community with as many well-insulated older homes as this one, direct-vent units are almost always the better and more common choice—ask your dealer to confirm before committing to a vent-free model.

Plan on an annual inspection, ideally in early fall before the heating season starts. A certified 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. Local gas appliance service providers in the Essex County area typically charge $150 to $250 for this visit, and it's worth keeping current given how many Short Hills fireplaces run daily through the winter.

Gas delivers real heat output—enough to actually take the chill off a room on a 20-degree January night—plus the look and sound of a real flame, but it requires venting and an existing or new gas line. Electric fireplaces need only a standard outlet, install in an afternoon for roughly $400 to $1,200 in most cases, and can go almost anywhere in the house, but they produce far less usable heat and are better suited to ambiance than to actually warming a room. At Jersey Central Power & Light's residential rate of roughly 15 cents per kWh, running an electric unit as a primary heat source gets expensive fast. Since wood-burning fireplaces are largely impractical in a dense suburb like this, the real choice for most Short Hills homeowners comes down to gas for genuine heat and ambiance, or electric for a simple, low-commitment upgrade in a bedroom or den.

If it was installed more than 15 years ago, probably. Older gas fireplaces keep a standing pilot light burning all the time, and that little flame can cost a couple hundred dollars a year. Newer models use pilot-on-demand ignition—the pilot lights only when you use the fireplace and goes out when you turn it off.

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.

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.

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.