Installing a gas fireplace costs $2,300 to $10,000 in 2026, and the most common job, a gas insert going into an existing fireplace, lands around $3,600 installed. The spread is wide because the unit is only part of the bill. Venting, the gas line run, and the surround decide the rest.
- Gas insert into an existing fireplace: $2,000 to $5,000 installed, about $3,600 for most
- New direct-vent gas fireplace: $4,300 to $11,200
- Ventless unit: $1,500 to $4,600, with real caveats below
- Gas log set: $400 to $1,000 for the set, plus a plumber to connect it
What is the average cost to install a gas fireplace?
Between $3,600 and $6,200, depending on whose average you take. We pulled the three big national cost guides on July 10, 2026, and lined them up:
| Source (2026 guide) | Average | Typical range |
|---|---|---|
| Angi (updated May 2026) | $3,600 (insert, installed) | $2,500 to $10,000 all gas types |
| HomeGuide (January 2026) | $6,200 | $2,300 to $10,000 |
| HomeAdvisor | $3,700 (insert, installed) | $2,300 to $8,000 |
HomeGuide’s average runs high because it folds in new-construction fireplaces with full venting and custom surrounds, jobs that can pass $20,000. If you already have a fireplace or a straightforward wall for a direct-vent unit, plan around $2,300 to $5,000.
Price by project type
| Project | 2026 installed cost |
|---|---|
| Gas log set in a working fireplace | $400 to $1,000 for the set, plus hookup labor |
| Ventless gas fireplace | $1,500 to $4,600 |
| Gas insert in an existing masonry fireplace | $2,000 to $5,000 |
| New direct-vent gas fireplace | $4,300 to $11,200 |
| Wood fireplace converted to gas | $1,500 to $8,000 |
The pattern in that table: the more your project reuses what the house already has, the less you pay. A log set borrows the whole fireplace. An insert borrows the chimney. A new direct-vent unit borrows nothing, so you pay for framing, venting, gas, and finish work.
Direct vent vs ventless: the price gap and the catch
Ventless is the cheap option at $1,500 to $4,600 installed, against $4,300 to $11,200 for direct vent, per HomeAdvisor’s 2026 data. No vent to cut and no pipe to buy is a real saving.
The catch is what you get with the discount. Ventless units release their combustion products, including water vapor, into the room. Owners who regret theirs complain about smell and window condensation more than anything else. Several states regulate them heavily and California bans them outright. If you go ventless, a carbon monoxide detector in the same room is not optional.
Direct-vent units are sealed behind glass and exhaust outside, which is why installers and code officials like them. Our full vented vs ventless comparison publishes in August.
What makes the price jump?
Five line items do most of the damage:
- The gas line. Extending an existing line to the fireplace runs $250 to $500. No gas at the house means a new line at $350 to $2,000, per HomeGuide’s 2026 figures.
- Venting and chimney work. Vent pipe runs $10 to $20 per linear foot. If the chimney needs repair before it can host an insert liner, that remedial work can add $1,000 to $6,000.
- The surround. Tile and concrete start near $5 to $25 per square foot installed. Stone reaches $150. A marble face can put the surround past the cost of the fireplace itself.
- Electrical. Ignition systems and blowers need power at the unit. Budget $150 to $200 for typical wiring.
- Permits. $100 to $500, usually handled by the installer and folded into the quote.
Do you need a permit to install a gas fireplace?
Yes, almost everywhere, any time gas line work happens. Gas appliance installation falls under the National Fuel Gas Code, NFPA 54, and your local inspector enforces it through the permit. Expect $100 to $500, pulled by the installer on a legitimate job.
An unpermitted gas install surfaces at the worst times: a home sale, an insurance claim, or a leak. If a bid is oddly cheap and skips the permit, that is the discount you are getting.
Can you install a gas fireplace yourself?
Not the parts that matter. Gas line connections and venting are licensed-trade work under code in most of the country, and they are the two failure points that burn houses down or put carbon monoxide in bedrooms. This is not the project to learn plumbing on.
What you can do yourself is the finish work. Framing a surround, tiling, hanging a mantel: all fair game after the unit is in and inspected, and doing it yourself can claw back $1,000 or more of the labor bill.
What does a gas fireplace cost after the install?
Plan on $400 to $640 in gas for a heating season of regular evening use, plus $75 to $200 for the annual inspection, per HomeAdvisor’s 2026 numbers. Repairs, when they come, run $200 to $1,000, with igniters and pilot assemblies at the cheap end and blower motors and gas valves at the expensive end. Our gas fireplace repair cost guide publishes in early August.
How we checked these prices
FireplaceIQ does not install fireplaces or sell leads to anyone who does, so we have no stake in the number you budget. These figures come from the published 2026 cost guides at Angi, HomeGuide, and HomeAdvisor, pulled on July 10, 2026. Where the guides disagreed, we showed the disagreement instead of averaging it away. HomeGuide’s high average was the biggest gap, and the new-construction jobs inside it explain most of the difference. We recheck all of it in September before the heating season.
The gas costs do not stop at the install. The Fireplace Costs hub collects every price guide on the site, the Gas Fireplaces hub covers how these units actually work, and if your project involves an old chimney, start with what a chimney sweep costs before an installer quotes you for repairs you may not need.
Gas fireplace installation cost FAQ
How long does gas fireplace installation take?
One to three days for most projects, per Angi’s 2026 guide. An insert into a sound existing fireplace sits at the short end. New framing, venting, and surround work stretch it.
Does a gas fireplace need a chimney?
No. Direct-vent units exhaust through a wall or roof pipe, no masonry chimney required. An insert reuses the chimney you already have with a new liner run through it.
Will a gas fireplace work when the power is out?
Units with a standing pilot and millivolt valve keep working with no electricity. Electronic ignition models need power, and many offer a battery backup for outages. The blower stops either way, so you get radiant heat only.
Is a gas fireplace cheaper to run than a furnace?
For heating one room in the evening, usually yes, because you heat only the space you are in. As a whole-house heat source it loses to the furnace. HomeAdvisor pegs a season of regular fireplace use at $400 to $640 in 2026.
Does a gas fireplace add value to a house?
Fireplaces show up consistently on buyer want lists, and a gas unit is the most usable kind for most owners. Treat the value bump as real but partial. You should not expect the install cost back dollar for dollar.