Warm up Rock County without splitting a single log.

Most gas fireplace installations in Rock County run between roughly $4,000 and $10,000, depending on the unit, the venting path, and whether new gas line work is required. A direct-vent gas insert dropped into an existing masonry fireplace in an older Janesville or Beloit home—where a gas line is often already nearby—tends to land on the lower end. A new direct-vent fireplace built into a wall for a remodel or addition, with fresh venting and a gas line extension, runs higher. Homes on propane in the outlying townships may see added cost if a new tank installation is needed. Local dealers will confirm a firm number after seeing your space.

Yes, and it's a common project in Rock County's older housing stock—plenty of homes in Janesville's and Beloit's historic neighborhoods still have the original masonry fireplace that was built to burn oak or maple cordwood. A gas insert typically slides into that existing firebox and vents through the same chimney using a stainless liner, which keeps the mantel and surround intact while adding real, consistent heat output. The conversion generally runs in the same $4,000–$9,000 range as a standalone install, with the final number depending on whether the home already has a gas line nearby or needs one run.

Either works, and which one you use mostly comes down to where you live in the county. Natural gas from Alliant Energy reaches most of Janesville, Beloit, Milton, and Edgerton, so if your home already has a gas water heater or furnace, adding a fireplace is usually simple. Out in the rural townships where the gas main doesn't run, propane is the standard alternative, supplied by tank from a regional propane company. Most gas fireplace models can be set up for either fuel—your installer just configures the correct orifice and regulator for the gas type you have.

Most modern gas fireplaces will, which matters in Rock County given how often winter storms and summer derechos knock out power across the Rock River valley. Units with intermittent pilot ignition (IPI) run on a battery backup—typically a few AA batteries inside the unit—that kicks in automatically when the power drops, so the fireplace still lights on demand. Valor takes a different approach: its fireplaces generate their own electricity through the pilot's thermocouple, so there's no battery to remember or replace. If keeping heat during an outage is a priority, ask your local dealer about the specific ignition system on any unit you're considering.

A gas fireplace is a fully built-in unit framed into a wall—the right choice for new construction or a remodel in a Rock County home without an existing hearth. A gas insert is built to slide into an existing masonry fireplace opening, turning a drafty old wood-burning hearth into a sealed, high-efficiency heat source that still vents through the original chimney. A gas stove is a freestanding cabinet-style unit that sits on the floor like a wood stove but runs on gas or propane. For most Rock County homeowners upgrading a fireplace they already have, an insert is the typical answer; new rooms or additions usually call for a built-in fireplace instead.

Yes—a building permit is required for a new gas fireplace installation, along with a separate gas permit for any new gas line work. Homes within Janesville or Beloit go through the city's building inspection division; homes in unincorporated Rock County go through the Rock County Planning, Economic & Community Development Agency. The gas line portion has to be completed by a licensed gas fitter, which is one reason it pays to work with an established hearth dealer—they coordinate the gas work, the venting, and the inspection instead of leaving you to manage separate trades.

Vented gas fireplaces—direct-vent or B-vent—pull combustion air from outside and exhaust the byproducts back outside through a sealed pipe. They're the cleaner, safer option and the one most Rock County dealers install by default. Vent-free (unvented) gas fireplaces burn directly into the room without any outside venting; they're legal in Wisconsin but come with strict room-sizing rules and require an oxygen depletion sensor. For most Rock County homes, a direct-vent unit is the better fit—it delivers strong heat output without any tradeoff on indoor air quality, which matters over a heating season that runs six months or more.

An annual inspection is recommended for any gas appliance, including direct-vent fireplaces and inserts. A technician checks the burner, pilot assembly, venting, and gas connections, and cleans the glass and interior—a much quicker visit than a wood chimney sweep, but just as important given how much use these units see through Rock County's long winter. Local gas appliance service providers typically charge $150 to $250 for the annual visit.

Wood—burning local oak, maple, birch, or aspen—offers the lowest fuel cost if you're cutting or splitting your own, the authentic feel of a real fire, and heat that keeps working even when the power's out. Gas offers instant on-off convenience, no ash or creosote to manage, and steady heat output without tending a fire, which matters on a January night when the temperature's sitting at 12°F and you just want the room warm. Many Rock County homes end up with both: a gas fireplace or insert in the main living space for everyday use, and a wood stove elsewhere as backup heat for extended outages.

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.

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.

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.

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.