Budget $4,000–$10,000 for an Installed Gas Fireplace Insert

For a direct-vent gas fireplace insert installed in an existing masonry fireplace, $4,000 to $10,000 is a useful early-planning range in the U.S. in 2026. A basic appliance in a compatible fireplace can cost less. Premium fronts and controls, difficult utility runs, chimney repairs or custom finish work can push the project above $10,000.

Published prices vary because the quoted packages are not equivalent. Angi places direct-vent insert projects at $4,300 to $11,200, while its broader $2,300 to $8,000 range also includes less expensive vent-free units. A premium hearth retailer estimates $6,000 to $10,000 installed, and a Pennsylvania hearth dealer reports $7,000 to $8,800 for a package including the insert, front, surround, venting, and gas, electrical and chimney labor (Angi, Luxury Fire, The Stove Shop).

The practical answer is therefore not one national average. It is a model-specific quote with a complete scope.

Where the installed cost goes

Cost item	2026 planning allowance	What changes it
Direct-vent insert	Roughly $2,900–$8,000	Brand, size, controls, decorative front and media
Installation labor	$500–$1,500+, before major chimney work	Access, chimney height, vent routing and local labor
Co-linear liner kit	About $700 in one premium-dealer estimate	Chimney height, liner sizes, cap and model requirements
New or extended gas line	$200–$1,000	Distance, access, pipe sizing and local rates
Electrical work, if required	$200–$500	Outlet location, access and circuit condition
Permits and inspections	Often $100–$400	Local fee schedules and number of permits
Chimney inspection or cleaning	Roughly $150–$375	Inspection scope, deposits, access and flue count
Surround or finish upgrades	$0–$1,000+, before substantial masonry work	Standard panel versus oversized, custom, tile or stone work

These are allowances, not charges to add together automatically. A current retailer lists a budget direct-vent insert at $2,935 before installation, while a premium dealer quotes $4,000 to $8,000 for the appliance itself. HomeGuide and Angi both put straightforward installation labor around $500 to $1,500, but that does not cover every possible vent, masonry or utility complication (Smoky Mountain General Store, HomeGuide, Angi).

Verify the fireplace and vent path before choosing the insert

A gas insert is a listed appliance, not simply a burner placed in an old firebox. The fireplace must accept the specific model, and the vent system must follow that model’s instructions.

For example, the Regency Gi33LE specification calls for 3-inch-by-4-inch co-linear venting and gives model-specific minimum fireplace dimensions, hearth provisions and mantel clearances. Those measurements do not apply to other inserts (Regency Gi33LE specification).

Before accepting a quote, have the contractor document:

1. The existing fireplace type and its width, height, depth, rear width and taper—not just the dimensions at the face.
2. Whether the proposed insert is approved for that fireplace construction.
3. The complete intake and exhaust route, liner sizes and termination assembly.
4. Mantel, sidewall, hearth and facing clearances for the exact model.
5. Chimney condition and any cleaning or repair needed before installing liners.

Use the measurements and compatibility checks in this chimney insert worksheet before selecting an appliance. If the job replaces an existing insert rather than converting an open masonry fireplace, use the separate fireplace-insert replacement cost guide.

Costs that commonly change after the initial estimate

Gas piping

An existing gas stub does not define the complete scope. The written proposal should say who will size and install the piping, provide the required shutoff, test the connection and verify appliance inlet pressure. Distance and access affect price, while an inadequate existing supply can require a larger change than a simple branch extension.

Electrical supply

Electrical requirements vary by model. Blowers, ignition systems and controls may need line power, while outage behavior also differs. The installer should identify the required power supply and include any outlet or circuit work rather than leaving it as a day-of-installation extra.

Chimney condition and roof access

Tall chimneys, offsets, steep roofs, damaged masonry and difficult cap access increase labor. Ask whether the price includes the initial assessment, cleaning, liner installation, termination cap and weather sealing. List repairs separately instead of accepting an undefined “chimney work” allowance.

Front, surround and finish package

The advertised appliance price may not include every item shown in a showroom image. Confirm whether the decorative front, backing plate, surround, log or media package, blower and remote are included. An oversized metal surround may cover an irregular opening; custom metal, tile, stone or masonry work can cost considerably more.

Permits and inspections

Requirements are local and may involve more than one trade. Portland’s July 2026 mechanical fee schedule, for example, separately lists decorative fireplaces, inserts, fuel piping and appliance vents as permit categories (City of Portland fee schedule). Ask the authority having jurisdiction which permits and inspections apply at the project address.

Compare the same scope in every quote

A useful proposal identifies:

• Manufacturer, exact model, fuel and input range
• Front, surround, media, blower, remote and accessories
• Vent system, liner diameters, length, termination and cap
• Fireplace and chimney assessment included before installation
• Gas-piping scope, testing and responsible trade
• Electrical scope and responsible trade
• Permits, inspections, taxes and disposal
• Cleaning, repair and finish-work allowances
• Startup, leak check, control demonstration and warranty terms
• Explicit exclusions

Confirm that every bid is for the same appliance category. A gas log set, a sealed direct-vent insert and a built-in gas fireplace have different venting and installation requirements. If the category is unclear, start with how gas-fireplace venting differs by design.

A low quote may be valid when the fireplace is compatible and the utilities are ready. It is not comparable to a higher quote if it omits the vent kit, decorative front, electrical work, permits or chimney preparation. Use $4,000–$10,000 for initial planning, then make the purchase decision from a site-specific, model-specific written scope.