How much does it cost to convert a wood-burning fireplace to gas in Ottawa?

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Ottawa Fireplaces · Accepted Answer

Converting an existing wood-burning fireplace to gas in Ottawa typically costs $3,000 to $7,000 installed, depending on whether you're installing a gas insert (the most common approach) or performing a full firebox conversion. A gas insert — which slides into your existing masonry fireplace and vents through the chimney — usually runs $2,500 to $5,500 installed, while a complete firebox conversion with custom gas lines and direct-vent venting can reach $5,000 to $7,000 or more.

Why Convert in Ottawa?

The case for converting a wood-burning fireplace to gas is compelling in Ottawa's climate. A wood fireplace operates at only 30 to 40 percent efficiency — most of the heat you generate goes straight up the chimney, while the appliance simultaneously creates negative pressure that pulls warm, conditioned air out of your home. A modern gas fireplace insert, by contrast, operates at 70 to 85 percent efficiency and produces dramatically more usable heat from the same firebox footprint. In Ottawa winters, where you're burning a fire for six or seven months of the year, that efficiency difference translates into real money saved on supplemental heating costs.

Gas is also far more convenient than wood. You get instant ignition with a wall switch or remote, no ash cleanup, no creosote buildup requiring annual chimney sweeps, and no need to source, season, and store 4 to 8 cords of firewood annually. The ambiance is nearly identical to a wood fire — modern gas inserts produce realistic flame effects with ceramic logs and embers — and you still get the psychological and emotional comfort of gathering around a fire on a bitter Ottawa night.

What's Included in the Cost

A gas insert installation includes the insert unit itself ($1,500 to $3,500), labor to remove the wood stove or old insert if present, installation of the insert into the firebox, venting materials (typically a flexible stainless steel liner that runs up your existing chimney), gas line extension from your existing line to the fireplace location (or installation of a new gas line if one doesn't exist nearby), a TSSA compliance inspection and tagging by a licensed gas fitter, and operational testing. Some contractors include a basic hearth surround update or touch-up; others charge separately for cosmetic work. The chimney itself usually doesn't require major work — the existing masonry and structure remain intact — though the chimney sweep and inspection before installation typically run $200 to $350 extra.

Key Considerations for Ottawa Homeowners

You must hire a TSSA-licensed gas fitter (G2 or G3 certificate) for all gas work — this is not optional in Ontario, and unlicensed gas work voids your home insurance and creates serious carbon monoxide and explosion hazards. After installation, the fitter must tag the appliance with a TSSA compliance label. Insist on seeing this documentation.

Your existing chimney needs to be in reasonably sound condition. If your masonry is severely deteriorated, cracked, or crumbling from Ottawa's freeze-thaw cycles, you may need chimney repair or relining before a gas insert can be safely installed. A Level 1 WETT inspection ($250 to $450) before work begins will identify structural issues. If the chimney requires relining — common in older Ottawa homes — add $2,000 to $5,000 to your total project cost.

Gas line routing matters for both cost and aesthetics. If your gas meter is on the opposite side of your house from the fireplace, or if the line must run through finished living space, costs climb significantly. A short gas line run (under 20 feet) adds $300 to $600; a longer run or one requiring wall and floor penetrations can add $800 to $1,500. Some homeowners choose to run the line externally and hide it with trim or plantings, which can reduce costs slightly.

Check whether your homeowner's insurance or mortgage lender has preferences regarding appliance type. Some policies incentivize gas conversions because gas fireplaces eliminate creosote and chimney fire risks. A few older policies may have restrictions on gas appliances in certain situations — worth a quick call to your insurer before committing.

Timeline and Seasonal Considerations

Gas insert installations typically take one to three days once the professional arrives — the actual work is faster than wood stove installation because you're not building a complete chimney run. However, scheduling can be challenging. Many Ottawa fireplace contractors are booked solid from September through November as homeowners rush to install heating before winter. If you're considering a conversion, book in June or July for a late summer or early fall installation, giving you time for any necessary chimney repairs and avoiding the autumn crunch.

When Conversion Might Not Be Ideal

If you genuinely love burning wood and have reliable access to properly seasoned firewood, a wood-burning fireplace or insert may still be your preference despite lower efficiency — that's a p

Why Convert in Ottawa?

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