Will my home insurance go up if I add a wood stove, and does WETT certification help in Ontario?

Adding a wood stove will likely impact your home insurance premiums in Ontario, but the effect depends heavily on whether you get WETT certification — and in most cases, your insurer will simply refuse to cover a wood stove without it.

Here's the reality: most Ontario insurance companies now require a WETT (Wood Energy Technology Transfer) Level 1 inspection before they will issue or renew a home insurance policy that covers a wood-burning appliance. Without WETT certification, your insurer has legitimate grounds to deny claims related to fire damage or chimney issues. Some insurers will outright deny coverage for homes with uncertified wood stoves; others will include a clause that excludes losses originating from the wood stove or chimney. Either way, you're paying for insurance that doesn't actually cover the appliance you just installed, which defeats the purpose entirely.

The WETT certification advantage is substantial. A WETT Level 1 inspection (typically $250 to $450 in Ottawa) examines the appliance itself, the chimney condition, proper clearances to combustible materials like walls and furniture, the hearth pad dimensions, and overall system safety. Once the inspection is completed and passes, you receive a WETT certificate that you can present to your insurance company. This documentation proves the installation meets the safety standards that insurers require, and it dramatically reduces their perceived risk. In many cases, having WETT certification actually keeps your premium increase modest — often just $50 to $150 per year, depending on your current policy and insurer.

Without WETT certification, you're looking at either higher premiums (if the insurer will cover you at all) or outright denial of coverage. Some insurers impose surcharges of $200 to $500 annually for uncertified wood stoves, effectively punishing you for not having the inspection done. The math is clear: a WETT inspection costs around $300 to $400 once, while the annual surcharge for skipping it can exceed that cost every single year for years.

Installation also matters. Your insurance premium will increase more significantly if clearance-to-combustible violations exist — for example, if the wood stove is too close to a wooden wall or if the hearth pad doesn't extend far enough into the room. A WETT-certified installer (which costs $4,500 to $9,500 for a complete wood stove installation in Ottawa, including the stove, chimney, hearth pad, and labour) ensures these clearances are met from the start. DIY installations or installations by unlicensed folks may create violations that cause insurers to decline coverage entirely or impose severe surcharges.

The Ontario building code is clear on this. The Ontario Building Code requires specific clearance-to-combustible distances — typically 18 inches from the stove body to wooden walls, or less if you install metal heat shields, and the hearth pad must extend at least 16 inches from the front of the stove and 8 inches on the sides. Violating these distances not only voids your WETT certification but also creates genuine fire risk and gives your insurer grounds to deny coverage if a fire occurs.

Before you install a wood stove, contact your current home insurance provider and ask explicitly: "What is your policy regarding wood-burning stoves? Do you require WETT certification? What is the premium adjustment?" Different insurers have different thresholds — some are more lenient, others are strict. Once you know your insurer's requirements, you can factor that cost and approval process into your decision.

The good news is that WETT certification is not expensive relative to the value it provides. A few hundred dollars for the inspection, combined with hiring a WETT-certified installer from the start, ensures your installation is safe, compliant, and insurable. You can browse qualified fireplace and wood stove installers through the Ottawa Construction Network directory to find WETT-certified professionals in your area who can handle both the installation and the certification process.

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Looking for experienced contractors? The Ottawa Construction Network connects Ottawa homeowners with qualified professionals:

• Justyn Rook Contracting
• JC Carpentry
• TIER 1 HVAC SERVICE'S INC
• Dump n Dash Hauling
• Best Hand2Hand moving company