This page is research
LA Trusted publishes this cost guide so you can budget from published figures. It does not sell or install fireplaces, it does not dispatch anyone, and it sets none of the prices above.
New Jersey cost guide
Gas Fireplace Installation Cost in New Jersey (2026)
A gas fireplace costs $2,300 to $10,000 installed, $6,200 on average (HomeGuide, 2026). Homeyou's Paramus, New Jersey range is $968 to $5,448. An insert into an existing fireplace runs $2,000 to $5,000; a gas log set $300 to $2,000 (HomeGuide). The gas line, the vent and the surround are priced on top.
- Gas fireplace, installed
- NJ $968 – $5,448 typical (Paramus, NJ) · Homeyou, updated Oct 25, 2026
- US $2,300 – $10,000; $6,200 average · HomeGuide, Jan 2, 2026
- Gas insert into an existing fireplace
- NJ no NJ figure confirmed · checked Oct 28, 2026
- US $2,000 – $5,000 installed · HomeGuide, Feb 9, 2026
- Gas log set in an open fireplace
- NJ no NJ figure confirmed · checked Oct 28, 2026
- US $300 – $2,000 installed · HomeGuide, Feb 9, 2026
- The unit alone
- NJ no NJ figure confirmed · checked Oct 28, 2026
- US insert $1,500 – $3,500; new fireplace materials $1,100 – $4,000 · HomeGuide, 2026
- Installer labor
- NJ no NJ figure confirmed · checked Oct 28, 2026
- US insert $500 – $1,500; new fireplace $1,200 – $6,000 · HomeGuide, 2026
- Gas line to the fireplace
- NJ no NJ figure confirmed · checked Oct 28, 2026
- US extend $350 – $800; new line $350 – $2,000; $15 – $50+ a foot · HomeGuide, Jan 6, 2026
- Venting or chimney liner
- NJ no NJ figure confirmed · checked Oct 28, 2026
- US vent $1,000 – $3,500; steel liner $900 – $3,800 · HomeGuide, 2026
- Mantel and surround
- NJ no NJ figure confirmed · checked Oct 28, 2026
- US mantel $500 – $5,000; stone $50 – $150 a sq ft · HomeGuide, Jan 2, 2026
- Running it
- NJ $1.37 a therm, Jan 2026 (NJ residential gas) · EIA, release Sep 30, 2026
- US $400 – $640 a year; $0.35 – $0.62 an hour · Angi, Jul 8, 2026
- Permit
- NJ gas piping is not ordinary maintenance; ask your town · N.J.A.C. 5:23-2.7, read Oct 28, 2026
- US $100 – $500 · HomeGuide, Jan 2, 2026
These are published market figures, not LA Trusted prices. The one New Jersey price line comes from Homeyou's Paramus cost guide; the gas price from the U.S. Energy Information Administration's New Jersey residential series; the permit line from New Jersey's construction code. "No NJ figure confirmed" means we did not find a New Jersey figure for that line that we could open at its source; the US figure beside it is national. Every figure was read on October 28, 2026 and is named to its source in the tables below.
Last updated October 28, 2026. LA Trusted Partners routes plumbing and remodeling requests to independent providers after your consent — it does not sell or install fireplaces, it does not dispatch technicians, and it does not set, quote or guarantee any provider's pricing, availability, response time or workmanship. Every price below comes from a cited published source, with the date it shows or the date we read it. Permit, license and alarm rules come only from New Jersey's own code, and the gas price only from the EIA.
How Much Does Gas Fireplace Installation Cost in New Jersey?
Between about $1,000 and $10,000, and where you land depends on what goes in. Homeyou's Paramus, NJ guide (updated October 25, 2026) gives a typical range of $968 to $5,448 from quotes in Paramus and the region, and a wider $2,500 to $10,000 in its answers. It is the only New Jersey price we could open at its source; it does not say what each quote included.
The national figures are clearer about that. HomeGuide (January 2, 2026) puts a new gas fireplace at $2,300 to $10,000 installed, $6,200 on average, from $550 at the very low end to $20,000: materials $1,100 to $4,000 and labor $1,200 to $6,000. Its insert page (February 9, 2026) is the one that ranks on this search near Elizabeth: $2,000 to $5,000 installed for an insert, $300 to $2,000 for a gas log set.
Thumbtack (updated July 1, 2026) reports a lower $330 to $1,590 range, $736 typical, from jobs booked through its site; the installers it quotes put a direct-vent fireplace at $3,500 to $7,500 and an insert at $4,400 to $6,500 before any plumbing or electrical work.
| Source | Published figure | What it covers | Dated |
|---|---|---|---|
| Homeyou, Paramus, NJ | $968 – $5,448 typical | Gas fireplace installation quotes from homeowners in Paramus and the region; its FAQ gives a wider $2,500 – $10,000. | Updated October 25, 2026 |
| HomeGuide, national | $2,300 – $10,000; $6,200 average | A new gas fireplace installed: materials $1,100 – $4,000 and labor $1,200 – $6,000, from $550 at the low end to $20,000. | January 2, 2026 |
| HomeGuide, national | $2,000 – $5,000 | A gas insert installed in an existing fireplace: unit $1,500 – $3,500 plus $500 – $1,500 labor, about one day's work. | February 9, 2026 |
| HomeGuide, national | $300 – $2,000 | A gas log set installed in an open fireplace: logs $200 – $1,500 plus $100 – $500 labor. | February 9, 2026 |
| Thumbtack, national | $330 – $1,590; $736 typical | Installation jobs booked through Thumbtack; the pros it quotes put a direct-vent fireplace at $3,500 – $7,500 and an insert at $4,400 – $6,500 before plumbing or electrical. | Updated July 1, 2026 |
| Angi, national | $400 – $640 a year | Running a gas fireplace, $520 on average; $0.35 an hour on natural gas at $1.38 a therm, $0.62 on propane at $2.48 a gallon. | Updated July 8, 2026 |
Why the ranges are so wide
Three jobs hide inside one price. An insert into a sound masonry fireplace takes about one day for a gas plumber or HVAC professional, HomeGuide says. A new built-in on a blank wall needs framing, a vent run and a surround. A house with no gas service needs a line from the street first, $2,000 to $10,000 or more. Ask for the unit, the gas line, the vent and the surround as separate lines, and the quotes become comparable.
What Google's own summary says
The answer box above the results for this search quotes $2,300 to $10,000, the HomeGuide range, and says most homeowners spend $3,700 to $6,200. Neither it nor the top three pages gives a New Jersey figure, separates the gas line from the vent, or names New Jersey's permit, license or alarm rules. This page does.
Gas Insert, Built-In Fireplace or Gas Logs: Which One Your House Can Take
The house decides more than the catalog does. If you already have a masonry fireplace and chimney, an insert is the usual answer: HomeGuide describes it as a sealed metal firebox that fits into the existing fireplace and vents through the chimney. If the room has no fireplace, the answer is a new built-in: HomeGuide's conversion page calls a new gas fireplace a completely sealed firebox that vents through the roof or an exterior wall instead of a chimney, and its insert page calls a zero-clearance fireplace a self-contained firebox that is framed into the wall. If the open fireplace works and you only want flames, a gas log set sits on the hearth.
Vent-free units are the cheapest on HomeGuide's pages, $700 to $2,500 for the unit against $2,500 to $3,500 vented, and HomeGuide says they are banned or heavily regulated in some areas because dangerous fumes can leak into the house. Ask your town's construction office whether it allows one before you buy.
| What goes in | What your house needs | Price published (HomeGuide) | Watch for |
|---|---|---|---|
| Gas insert | An existing masonry fireplace and chimney in sound shape; the insert is a sealed metal firebox that vents through the chimney. | $2,000 – $5,000 installed; vented unit $2,500 – $3,500, ventless unit $700 – $2,500, plus $500 – $1,500 labor. | A liner for the chimney, $900 – $3,800; a chimney cleaning first, $150 – $375. |
| Built-in (zero-clearance) gas fireplace | A wall with room for framing and a vent run out through the wall or up through the roof; no chimney needed. | $2,300 – $10,000 installed; materials $1,100 – $4,000, labor $1,200 – $6,000. | The vent or chimney, $1,000 – $3,500; the mantel and surround on top. |
| Gas log set | An existing open fireplace that works, with a damper that can stay open for vented logs. | $300 – $2,000 installed; logs $200 – $1,500, labor $100 – $500. | Little heat into the room; vented logs need a lined flue. |
HomeGuide: gas fireplace installation cost (January 2, 2026), gas fireplace insert cost (February 9, 2026) and the wood-to-gas conversion page (February 10, 2026), read October 28, 2026. Converting a wood fireplace to gas runs $1,500 to $8,000 on that page: $300 to $2,000 for logs, $2,000 to $5,000 for an insert, $3,000 to $12,000 to remove the wood fireplace and build a new gas one.
What a Gas Fireplace Installation Bill Is Made Of
None of the three pages that rank for this search splits the bill, so here it is split from HomeGuide's line items. The split matters here because the gas line is permitted work in New Jersey, HomeGuide says the masonry work around the opening is not typically done by the professional installing the firebox, and, in this page's reading, the unit and vent usually come from whoever sells the fireplace.
| Line on the bill | Published figure | Who does it |
|---|---|---|
| The unit | Insert $1,500 – $3,500; new fireplace materials $1,100 – $4,000 (HomeGuide) | Whoever sells you the unit (this page's reading; HomeGuide's insert page says only that Home Depot and Lowes subcontract the installation of the fireplaces they sell) |
| Installer labor | Insert $500 – $1,500; new fireplace $1,200 – $6,000 (HomeGuide) | HomeGuide: chimney sweeps, gas specialists, plumbers and HVAC professionals install gas fireplace inserts; it quotes $45 – $150 an hour for a licensed plumber and $75 – $150 for an HVAC technician |
| Gas line | Extend an existing line $350 – $800; new line $350 – $2,000; $15 – $50+ a foot (HomeGuide) | HomeGuide: a licensed plumber runs gas lines. Our note, not HomeGuide's: gas piping needs a permit in New Jersey, see the permit section |
| Vent or chimney liner | Vent $1,000 – $3,500; stainless steel liner $900 – $3,800 (HomeGuide) | The unit's installer or a chimney contractor (this page's reading; HomeGuide prices the liner but does not name the trade) |
| Framing, mantel, surround | Mantel $500 – $5,000; stone $50 – $150 a sq ft; stone veneer $45 – $75; tile $10 – $50; brick $25 – $50 (HomeGuide) | HomeGuide says masonry work is not typically done by the professional installing the firebox; a general contractor or remodeler is this page's reading of who does it |
| Extras | Glass doors $600 – $2,000; blower $100 – $500+ (HomeGuide) | The unit's installer (this page's reading) |
| Permit | $100 – $500 (HomeGuide); your town sets the fee | HomeGuide says the installer usually includes the fee in its labor cost; who files is between you and the contractor |
HomeGuide pages read October 28, 2026. In the right-hand column, the entries that start with "HomeGuide" are HomeGuide's words; the ones marked "this page's reading" are ours. None of it is a New Jersey licensing rule or a promise about any provider; the permit rule itself is in the permit section.
What the installer actually does
For an insert, HomeGuide says a gas plumber or HVAC professional installs it in about a day; a licensed plumber runs the gas line, and an HVAC technician removes or secures the damper open for safe venting. HomeGuide does not say who installs the liner. For a built-in, the framing and the vent run come first, then the unit, then the finish work (this page's reading of the order, not HomeGuide's); HomeGuide prices the labor at $1,200 to $6,000 depending on size, type and design, with a mantel, doors or a blower adding to it.
The surround is a remodel
Stone at $50 to $150 a square foot, veneer at $45 to $75, tile at $10 to $50, a mantel at $500 to $5,000 (HomeGuide). In Essex County that half of the job is what the general contractor page routes.
The Gas Line: Who Runs It in New Jersey and What It Costs
HomeGuide says a licensed plumber runs gas lines at $45 to $150 an hour; the code sections cited on this page say nothing about which trade may do it, only that New Jersey treats gas piping as permitted work: N.J.A.C. 5:23-2.7 says that adding to, altering, replacing or relocating gas piping is not ordinary maintenance. The State Board of Examiners of Master Plumbers licenses the trade, and the plumber's number is checkable on the State lookup linked below.
What it costs depends on the distance. HomeGuide's gas line page (January 6, 2026) prices the runs below. Its fireplace page (January 2, 2026) gives $250 to $500 for a short extension to the fireplace. A meter upgrade, a crawl space or a finished ceiling in the way moves the job toward the top of each range.
| Gas line job | Published figure (HomeGuide) | Covers |
|---|---|---|
| Extend an existing line | $350 – $800 | Tapping an existing gas line to add one nearby appliance, 10 – 30 feet |
| New run from the meter | $500 – $2,000 | A new line from the gas meter to one appliance |
| Per foot | $15 – $50+ | Materials and labor; $15 – $25 with easy access, $35 – $50+ with turns, fittings or hard access |
| New service from the street | $2,000 – $10,000+ | A main line from the street to a new meter, for a house with no gas |
| Move the meter | $1,000 – $4,500 | HomeGuide: most utilities own the meter, so coordinate with them first |
The meter belongs to the utility
HomeGuide says most utilities own the gas meter and may handle a meter move themselves or require an approved contractor, so coordinate with the utility before anything at the meter changes. We did not find a published PSE&G, Elizabethtown Gas or NJNG page on a fireplace hookup that we could open, so this guide makes no claim about what your utility does or charges: ask it. The gas line inside the house is the plumber's job, see the plumbing request page.
Venting and the Chimney Liner
A gas fireplace does not need a masonry chimney. HomeGuide says gas fireplaces typically use a Class A flue or B-vent, and that a direct-vent gas fireplace is a self-contained unit that vents through the ceiling or outside walls when there is no existing chimney. HomeGuide puts adding or replacing a chimney at $1,000 to $3,500, and says most fireplace installers include the cost of a chimney or vent in their estimate: ask.
An insert uses the chimney that is there, with a liner. HomeGuide prices a stainless steel liner that supports gas at $900 to $3,800, and says a chimney cleaning may be required before the insert goes in, $150 to $375. R&E Roofing, a New Jersey contractor, publishes a chimney liner cost guide for New Jersey (October 23, 2026) that goes through the liner by type and by the appliance it serves.
Direct-vent, B-vent or vent-free
HomeGuide's three kinds: vented, with an open front and a vent that releases fumes outdoors, the most common; direct-vent, with a sealed glass front and an exhaust vent, the safest and often dearer; and ventless, with no vent at all, cheaper but banned or heavily regulated in some areas because fumes can leak into the house. Whatever goes in, New Jersey requires a carbon monoxide alarm near the bedrooms once a fuel-burning appliance is in the house; the rule is in the permit section.
Repair or Replace an Old Gas Fireplace
Most gas fireplace repairs are a part. HomeGuide's fireplace repair page (February 9, 2026) puts a gas fireplace repair at $200 to $1,000 and prices the usual parts: a pilot light that will not stay lit, a thermocouple or thermopile that no longer holds the valve open, an igniter, or the valve itself. If you smell gas, HomeGuide says to call a plumber or repair service right away.
Replace when the repair is the firebox or the quote nears a new unit. A firebox repair is $150 to $1,000; a new insert is $2,000 to $5,000 installed. Angi puts an annual inspection at $75 to $250 and says most repairs it sees cost $200 to $1,000.
| Gas fireplace repair | Published figure (HomeGuide) |
|---|---|
| Gas fireplace repair, typical | $200 – $1,000 |
| Igniter | $90 – $150 |
| Pilot light | $100 – $350 |
| Thermocouple | $150 – $350 |
| Thermopile | $150 – $300 |
| Gas valve | $150 – $300 |
| Firebox | $150 – $1,000 |
| Chimney sweep and inspection | $150 – $375; inspection alone $55 – $130 |
Converting a wood fireplace
If the old fireplace burns wood, HomeGuide's conversion page (February 10, 2026) gives $300 to $2,000 for gas logs, $2,000 to $5,000 for a gas insert, and $3,000 to $12,000 to take the wood fireplace out and build a gas one. Removing the fireplace and leaving the chimney is $500 to $1,000.
What a Gas Fireplace Costs to Run in New Jersey
Cents an hour, and it depends on the fireplace's BTU rating and the gas price. Angi (updated July 8, 2026) puts the national cost at $400 to $640 a year, $520 on average, or $0.35 to $0.62 an hour, and gives the arithmetic: BTUs times the price per therm, divided by 100,000. Its New York row, the nearest it lists, is $1.16 to $2.47 a day for a 25,000 BTU fireplace run three hours a day on propane or natural gas.
New Jersey's residential gas price is published by the U.S. Energy Information Administration: $14.22 per thousand cubic feet in January 2026 and $18.76 in July 2026, the latest month in its September 30, 2026 release. The EIA's conversion note divides a price per thousand cubic feet by 10.37 to get a price per therm, so that is $1.37 a therm in January and $1.81 in July. Your bill's own rate replaces these.
| Fireplace size | Gas an hour | Cost an hour at $1.37 a therm (NJ, Jan 2026) | Cost an hour at $1.81 a therm (NJ, Jul 2026) |
|---|---|---|---|
| 20,000 BTU | 0.20 therm | $0.27 | $0.36 |
| 25,000 BTU | 0.25 therm | $0.34 | $0.45 |
| 30,000 BTU | 0.30 therm | $0.41 | $0.54 |
| 40,000 BTU | 0.40 therm | $0.55 | $0.72 |
Arithmetic by LA Trusted Partners from Angi's formula and the EIA's New Jersey prices and conversion factor, read October 28, 2026. A fireplace is a room heater, not a furnace: the furnace and boiler guide covers heating the whole house.
Permit, Plumbing License and the Carbon Monoxide Alarm Rule in New Jersey
Ask your town's construction office before work starts, and expect a permit. New Jersey's ordinary-maintenance rule, N.J.A.C. 5:23-2.7, lists the work that needs no permit; it says that adding to, altering, replacing or relocating gas piping is not ordinary maintenance, and the only gas appliances it lets you swap without a permit are a dryer, stove or oven of the same fuel, pipe size and location. The minor-work rule, N.J.A.C. 5:23-2.17A, covers like-for-like replacements of plumbing piping, water heaters, boilers and furnaces; a new gas fireplace is not on it. So the construction office decides what it wants filed, and the gas is inspected before it is turned on. HomeGuide puts a permit at $100 to $500 nationally; your town sets the fee.
HomeGuide describes the gas line as a licensed plumber's job. Look the plumber up in the NJ license and registration lookup, with the steps in how to check a contractor in New Jersey. The installer of the unit and the contractor doing the surround are checked the same way.
The carbon monoxide alarm, in the code's own terms
N.J.A.C. 5:70-4.19(d) says carbon monoxide alarms shall be installed in all dwelling units in one- and two-family or attached single-family dwellings, except units in buildings that do not contain a fuel-burning device or have an attached garage; single station alarms go in the immediate vicinity of the sleeping areas, may be battery, hard-wired or plug-in, and must be listed to UL 2034. A gas fireplace is a fuel-burning device. HomeGuide prices a CO detector at $20 to $160.
Read October 28, 2026. A summary, not legal advice.
Ten Questions Before You Approve a Gas Fireplace Quote
Two fireplace quotes can differ by the unit, the vent, the gas run, the surround and the warranty. Put each line against the published line items and the price by type.
Ask before the work starts
- Which unit, by make and model, and whether it is a direct-vent, B-vent or vent-free appliance. HomeGuide says vent-free units are banned or heavily regulated in some areas, so ask whether your town allows one before you pay for it.
- Whether the quote is for an insert in your existing fireplace, a new built-in with framing, or a log set. The three are priced $300 to $10,000 apart on HomeGuide's pages.
- The gas line as its own line: who runs it, how many feet, from where, and whether the plumber's permit is in the price.
- The vent as its own line: through the wall, through the roof, or a stainless steel liner down the chimney. HomeGuide prices the liner at $900 to $3,800.
- Whether a chimney inspection or cleaning comes first. HomeGuide says one may be required before an insert goes in, at $150 to $375.
- The surround and mantel as their own lines, with the material named. HomeGuide prices stone at $50 to $150 a square foot and a mantel at $500 to $5,000.
- Whether a blower, remote or wall switch is included, and whether a new electrical outlet is needed for it.
- Who files with your town's construction office, and the inspection the job will need before the gas is turned on.
- The plumber's New Jersey license number for the gas line, and the installer's business name and insurance evidence.
- How long the labor warranty runs on the install, separate from the manufacturer's warranty on the unit.
How LA Trusted Partners Fits Into a Gas Fireplace Job
No fireplace installer is promised
LA Trusted sends a gas line request through its plumbing category and a framing or surround request through its remodeling category; whether a matched plumber runs gas lines is confirmed job by job. It does not yet guarantee a fireplace installer in every town, and your contact information is shared with a matched independent provider only after you agree to the disclosure.
The provider owns the work
The unit, the price, the filing with your town, the warranty and the customer terms come from the independent provider. LA Trusted's standards ask that a provider's business identity and service area be checkable, and that licensing where applicable, insurance evidence and complaint history be checked before routing.
Ask About a Gas Fireplace Job in New Jersey
Send a plumbing request and say it is for a gas fireplace: the town, whether there is an existing fireplace and chimney, whether the house has natural gas, and whether you want the surround priced too. If a plumbing provider in our network runs gas lines in your town, that provider calls you back about the line; the surround goes to a remodeling provider as a second request.
Coverage depends on the town and the job, and a request is not a guarantee that a provider is available. LA Trusted does not do the work itself and does not promise a response time, so the quote and any warranty come from the provider who calls you.
In Essex County and want the surround and framing priced? The general contractor page has its own request. Already have a quote? Check it against the published line items.
Where to Go Next
Price the whole-house heat, the plumber's half of the job, or the license check before you sign.
Furnace and boiler repair cost in NJA fireplace heats one room. If the house is cold everywhere, published New Jersey and national furnace and boiler repair prices and the repair-or-replace thresholds.Open page Plumber cost in New JerseyPublished New Jersey and national hourly rates, service call fees and which plumbing repairs need no permit, for the gas line half of the job.Open page How to check a contractor in New JerseyThe State lookup for a plumber's license and a contractor's registration, step by step, before you sign.Open page
Gas Fireplace Installation Cost in NJ: Frequently Asked Questions
How much does it cost to install a gas fireplace in New Jersey?
Homeyou's Paramus, NJ cost guide, updated October 25, 2026, gives a typical range of $968 to $5,448 and a wider $2,500 to $10,000 in its answers. HomeGuide's national figure, dated January 2, 2026, is $2,300 to $10,000 with a $6,200 average: materials $1,100 to $4,000 and labor $1,200 to $6,000. These are published market figures, not LA Trusted prices.
How much does a gas fireplace insert cost installed?
HomeGuide (February 9, 2026) puts a gas insert at $2,000 to $5,000 installed: $1,500 to $3,500 for the unit plus $500 to $1,500 for labor, about one day of work. A vented unit alone runs $2,500 to $3,500 and a ventless one $700 to $2,500. Add $900 to $3,800 if the chimney needs a stainless steel liner.
How much do gas logs cost to install?
HomeGuide (February 9, 2026) prices a gas log set at $300 to $2,000 installed: $200 to $1,500 for the logs, burner and grate, plus $100 to $500 for labor. Vented logs need a lined chimney and a damper that stays open; they put little heat into the room, so HomeGuide calls them a secondary heat source.
How much does it cost to run a gas line to a fireplace?
HomeGuide (January 6, 2026) puts extending an existing gas line to a nearby appliance at $350 to $800, a new run from the meter to one appliance at $500 to $2,000, and the per-foot rate at $15 to $50 or more. Its gas fireplace page gives $250 to $500 for a short extension to the fireplace. A house with no gas service pays $2,000 to $10,000 or more for a line from the street.
Do I need a permit to install a gas fireplace in New Jersey?
Ask your town's construction office, and expect yes. New Jersey's ordinary-maintenance rule, N.J.A.C. 5:23-2.7, lists the work that needs no permit, and it says that adding to, altering, replacing or relocating gas piping is not ordinary maintenance. A gas fireplace is not on the minor-work list in N.J.A.C. 5:23-2.17A either, so the construction office decides what it wants filed and inspected before the gas is turned on.
Who installs gas fireplaces in New Jersey?
HomeGuide says a licensed plumber runs the gas line, and that a gas plumber, HVAC professional, chimney sweep or gas specialist installs the unit, an insert in about a day; it says masonry work is not usually done by the firebox installer. So more than one trade can be on one job. Check the plumber's license on the State lookup linked in the permit section.
Does a gas fireplace need a chimney?
No. HomeGuide says gas fireplaces do not necessarily need a masonry chimney and typically use a Class A flue or B-vent; its conversion page says a new gas fireplace is a completely sealed firebox that vents through the roof or an exterior wall instead of a chimney. An insert goes into an existing fireplace and vents through that chimney, HomeGuide says, and it prices a stainless steel liner at $900 to $3,800 when the chimney needs one. Vent-free units need no vent at all, but HomeGuide says they are banned or heavily regulated in some areas.
Does it cost a lot to run a gas fireplace?
Angi (updated July 8, 2026) puts the national cost at $400 to $640 a year, $520 on average, or $0.35 to $0.62 an hour. At New Jersey's residential gas price, $14.22 per thousand cubic feet in January 2026 per the EIA, which is $1.37 a therm, a 25,000 BTU fireplace burns about $0.34 an hour; at the July 2026 price of $18.76, or $1.81 a therm, about $0.45.
How much does gas fireplace repair cost?
HomeGuide (February 9, 2026) puts a gas fireplace repair at $200 to $1,000: an igniter $90 to $150, a pilot light $100 to $350, a thermocouple $150 to $350, a thermopile or gas valve $150 to $300, and a firebox $150 to $1,000. Angi puts an annual inspection at $75 to $250.
Should I repair my old gas fireplace or replace it?
Hold the repair quote against the replacement figures. A part on HomeGuide's list costs $90 to $350 to replace; a new insert costs $2,000 to $5,000 installed. If the firebox is cracked ($150 to $1,000 to repair) or the repair quote nears the price of a new unit, ask the installer to price both. Converting a wood fireplace to gas runs $1,500 to $8,000 (HomeGuide).
What is the life expectancy of a gas fireplace?
None of the sources on this page publishes a tested lifespan for a gas fireplace, so we do not give one. HomeGuide lists annual inspection and cleaning at $150 to $375 and says gas units need less upkeep than wood-burning ones. Ask the manufacturer's warranty terms for the unit you are quoted.
Do I need a carbon monoxide alarm with a gas fireplace in New Jersey?
Yes. New Jersey's fire code, N.J.A.C. 5:70-4.19(d), requires carbon monoxide alarms in dwelling units in one- and two-family or attached single-family dwellings that contain a fuel-burning device or have an attached garage, installed in the immediate vicinity of the sleeping areas and listed to UL 2034. HomeGuide prices a CO detector at $20 to $160.
Natural gas or propane for a fireplace?
Angi says propane runs about twice the cost of natural gas: its July 2026 national figures are $2.48 a gallon for propane against $1.38 a therm for natural gas, and a 25,000 BTU propane fireplace costs about $0.62 an hour against $0.35. If your house already has natural gas service, the fireplace runs on it; if not, HomeGuide prices an above-ground propane tank at $300 to $3,000 installed.
Sources used on this page
- Homeyou — Gas Fireplace Installation in Paramus, NJ: Costs (updated October 25, 2026)
- HomeGuide — How Much Does It Cost to Install a Gas Fireplace? (January 2, 2026)
- HomeGuide — How Much Does a Gas Fireplace Insert Cost? (February 9, 2026)
- HomeGuide — How Much Does Gas Line Installation Cost? (January 6, 2026)
- HomeGuide — How Much Does Fireplace Repair Cost? (February 9, 2026)
- HomeGuide — How Much Does It Cost to Convert a Wood Fireplace to Gas? (February 10, 2026)
- Thumbtack — 2026 Gas Fireplace Installation Cost (updated July 1, 2026)
- Angi — How Much Does It Cost to Run a Gas Fireplace? (updated July 8, 2026)
- U.S. Energy Information Administration — New Jersey price of natural gas delivered to residential consumers, monthly (release September 30, 2026)
- U.S. Energy Information Administration — Converting natural gas prices per cubic foot to per therm (FAQ)
- N.J.A.C. 5:23-2.7 — Ordinary maintenance (Uniform Construction Code)
- N.J.A.C. 5:23-2.17A — Minor work (Uniform Construction Code)
- N.J.A.C. 5:70-4.19 — Smoke alarms, carbon monoxide alarms and fire extinguishers in one- and two-family dwellings (Uniform Fire Code)
- NJ Division of Consumer Affairs — State Board of Examiners of Master Plumbers
- State of New Jersey — License and registration lookup
- R&E Roofing — Chimney Liner Cost in New Jersey (October 23, 2026)
Every source in this list was checked on October 28, 2026, and every figure taken from it re-read that day. Naming a company here is not an endorsement and does not mean it is an LA Trusted Partners provider.
Pricing a gas fireplace this winter?
Start one documented plumbing request for the gas line. You stay in control of whether your information is shared with a matched independent provider, and LA Trusted does not promise that a fireplace installer in your town is available or how fast anyone calls.