How much for a gas fireplace in an Ottawa basement?

Gas fireplace installation in an Ottawa basement typically runs $3,000–$8,000+ fully installed, depending on the unit you choose and how complex the venting situation is.

The biggest cost variables are the fireplace unit itself and the venting configuration. A direct-vent gas fireplace insert (the most common choice for basements) ranges from $1,500–$4,500 for the unit alone. Budget models are functional but basic; mid-range units ($2,000–$3,000) offer better flame realism and heat output; premium units with realistic log sets, remote controls, and higher BTU ratings push $3,500+. On top of that, professional installation labour typically adds $1,500–$3,500 depending on venting complexity.

Venting is where basement installations get tricky. Direct-vent fireplaces pull combustion air from outside and exhaust through a coaxial pipe — in a basement, this pipe needs to run horizontally through the rim joist or foundation wall to the exterior. If your basement has a walkout or easy exterior wall access, this is straightforward. If the fireplace needs to be positioned far from an exterior wall, or if you want a two-sided or see-through unit, costs climb quickly. A B-vent or natural vent unit requires a vertical chimney run, which is rarely practical in a finished basement and usually more expensive.

Ottawa-specific requirements matter here. All gas appliance installations in Ontario must be performed by a TSSA-licensed gas technician — this is not a DIY project, legally or safely. The work also typically requires a building permit from the City of Ottawa and an inspection. Enbridge will need to approve the connection to your gas line. Budget an extra $300–$600 for permits and inspections if not included in your contractor's quote.

For a realistic budget, most Ottawa homeowners spend $4,500–$6,500 for a quality direct-vent unit with a straightforward installation. If you're adding a feature wall, mantel surround, or stone/tile finishing around the fireplace, add another $1,500–$4,000 for those finishes.

One important note: Gas fireplace installation falls outside what Ottawa Basements handles directly — we focus on the broader basement renovation scope. For the gas work itself, you'll want a TSSA-licensed contractor. However, if you're planning a full basement finishing project that includes a fireplace as part of the design, we coordinate with licensed trades and can incorporate it into the overall renovation plan.

If you're thinking about a larger basement finishing project, Ottawa Basements offers free estimates and can help you plan the full scope — fireplace wall, framing, electrical, and all. Feel free to reach out to discuss your vision.