Installing gas logs in an existing fireplace typically costs $300-$2,500, with many standard projects near $1,200. The final price depends on the log set, whether a gas line already reaches the firebox, venting requirements, local labor rates, and any repairs needed before installation.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Complete installation | $300 | $1,200 | $2,500 | Existing fireplace; price varies with gas-line work and log set |
| Gas log set | $200 | $700 | $1,500 | Basic ceramic logs to larger or higher-end sets |
| New gas line | $300 | $650 | $1,200 | Depends on distance, access, and local requirements |
| Installation labor | $150 | $350 | $700 | More for troubleshooting or complex connections |
What Existing Fireplaces Usually Cost to Fit With Gas Logs
A straightforward installation with a suitable gas connection and a basic log set often totals $500-$1,200. A project requiring a new gas line, upgraded controls, or a premium log set commonly reaches $1,200-$2,500. Repairs to the firebox or chimney are generally additional.
Vented sets require an operable chimney or flue, while vent-free models have different installation and local-code requirements. Assumptions: Existing masonry or factory-built fireplace is serviceable, access is normal, and prices reflect typical U.S. residential work. A working gas stub and an inspection-ready fireplace are the biggest advantages for keeping the total near the low end.
Where Gas Line, Log Set, and Labor Charges Add Up
Quotes may combine parts and installation or list each task separately. The ranges below describe common components, not guaranteed add-on prices; a contractor may bundle labor, testing, and setup.
| Quote component | Typical price | Pricing basis | What changes it |
|---|---|---|---|
| Gas log set and burner | $200-$1,500 | Per set | Size, material, burner style, and controls |
| Gas-line connection | $100-$350 | Per connection | Existing stub location and fittings |
| New gas piping | $300-$1,200 | Per project; often $15-$35 per linear ft installed | Route, wall access, and pipe type |
| Installation and testing | $150-$700 | Per job | Setup, leak testing, and troubleshooting |
| Chimney or firebox service | $100-$600 | Per visit or repair | Inspection findings and cleaning needs |
Some contractors charge a service or diagnostic fee of $75-$200, which may be credited toward installation. Ask whether the quote includes connection materials, leak testing, commissioning, and disposal of the old grate or equipment.
How Gas-Line Distance and Burner Type Change the Quote
A gas stub already inside or beside the firebox can limit piping work to roughly $100-$350. If the route from the gas supply exceeds 20-30 feet, passes through finished walls, or needs a larger-capacity line, the piping portion can climb beyond $1,000. Long runs also require checking that the supply can serve the appliance safely.
Basic manual-control burners often cost less than remote-control or thermostatic packages, which can add about $100-$400. A fireplace opening wider than 36 inches may need a larger log set or burner, often raising equipment cost by $200-$600. Measure the firebox and confirm gas capacity before choosing a set.
How Many Labor Hours Gas Log Installation Takes
A simple replacement or installation using an existing gas stub may take 2-4 hours. Adding a short accessible line can take 4-8 hours; concealed routing or repairs can require a second visit. Plumbers or gas-fitters commonly bill around $75-$150 per hour, though flat-rate bids are also common.
Crews may include a licensed gas professional and, when needed, a chimney technician. Scheduling inspection or waiting for parts can extend the calendar time beyond the work itself. Request labor hours and the hourly or flat rate in writing, especially when the quote includes troubleshooting.
Do Regional Labor Rates Change Gas Log Installation Prices
Urban markets with higher labor costs can run about 10%-25% above typical national pricing, while some rural areas may be 5%-15% lower but have fewer installers or longer travel charges. Cold-weather demand can also tighten appointment availability before winter, particularly in regions where fireplaces are used regularly.
These are broad comparisons rather than fixed regional price lists. Local gas codes, permits, and inspection fees can outweigh labor differences. Compare at least two local written quotes with the same log size, venting type, and gas-line scope.
Vented or Vent-Free Gas Logs for an Existing Fireplace
Vented sets generally produce a more natural-looking flame but need a usable chimney and usually send more heat outdoors. Vent-free models may cost about $300-$1,500 for equipment, while vented sets commonly range from $200-$1,500; installation labor is additional. The actual choice depends on the fireplace, room, and applicable local rules.
Vent-free appliances are restricted or prohibited in some locations and may have room-size and installation requirements. Vented installations can uncover chimney or damper issues that add expense. Check local approval and the appliance listing before buying either type.
Which Installation Choices Can Lower the Gas Logs Price
Using a compatible existing gas stub, selecting a standard-size set, and avoiding unnecessary remote controls can reduce the bill. Have the fireplace inspected before ordering equipment so the log set fits the firebox and the chimney or venting arrangement is suitable. Bundling gas-line work with other planned gas-appliance work may reduce separate dispatch charges.
Do not cut costs by skipping leak testing, required permits, or code-compliant installation. If the fireplace needs extensive repairs, compare the repair estimate with replacement or another heating option before authorizing work. Keep the quote limited to the installation scope and list optional upgrades separately.
Three Existing-Fireplace Quotes With Different Gas-Line Scopes
A low-cost example is a 24-inch basic set using an existing gas stub: equipment at $350, 3 labor hours at $100 per hour, and $100 for fittings and testing, for about $750 total. This assumes normal access and no repair work.
A midrange example is a 30-inch remote-control set with a 15-foot accessible gas-line extension: $800 equipment, 6 labor hours at $110 per hour, and $250 in piping and materials, totaling about $1,710. A more involved 36-inch premium set with a 30-foot concealed line could cost $1,300 for equipment, $700-$1,000 for labor, and $500-$900 for piping and access work, or roughly $2,500-$3,200. These examples exclude major chimney repairs and vary by local labor and permit charges.