Insurance-compliant knob and tube wiring replacement for Toronto homes. Licensed electricians, ESA permits included, zero disruption approach. Get a free inspection and written estimate.
Major Ontario home insurance providers including Intact, Aviva, and Wawanesa now flag or refuse coverage for homes with active knob and tube wiring. If your policy is up for renewal and your insurer discovers K&T wiring, you could face cancellation, steep premium increases, or a requirement to rewire within 30 days. Don't wait for your renewal notice — get a free inspection now.
Knob and tube (K&T) wiring was the standard electrical system installed in Canadian homes from the 1880s through to the 1940s. It gets its name from the ceramic knobs used to anchor wires to framing and the ceramic tubes that protect wiring passing through joists.
While knob and tube wiring was acceptable by the standards of its time, it was designed for electrical loads far smaller than what modern homes require. It has no ground wire, cannot support three-prong outlets, and becomes genuinely dangerous when it has been modified, covered with insulation, or overloaded by decades of added appliances and circuits.
Toronto has one of the highest concentrations of pre-1950 housing stock in Canada. Neighborhoods like the Annex, Rosedale, East York, Leslieville, and parts of Etobicoke and North York are full of century homes that may still have original or partially replaced K&T systems.
Costs vary based on home size, accessibility, and how much original K&T remains. These are typical ranges for Toronto residential jobs.
All prices are estimates. Your electrician will provide a written quote after inspection. ESA permits and inspections are included in all quoted prices.
From first contact to final ESA inspection — here is the typical process.
A licensed electrician visits your home, identifies all K&T wiring, assesses your panel, and produces a written scope of work and quote at no charge.
Your electrician files the ESA permit before any work begins. This is mandatory for all rewiring work in Ontario and protects you legally.
New wiring is run using a minimal-disruption approach where possible. Most Toronto homes are rewired in 2 to 5 days depending on size and complexity.
An ESA inspector verifies all work meets Ontario Electrical Safety Code. You receive a certificate of inspection to provide your insurer.
Submit the ESA certificate to your insurance provider. Your policy is restored, your home is safe, and your property value is protected.
Find out exactly what K&T wiring remains in your home and what it will cost to replace it. No pressure — just a licensed electrician and a written estimate.
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A licensed Toronto electrician will contact you within 2 hours to schedule your free inspection.
Toronto has one of the largest concentrations of pre-war housing in Canada. Neighbourhoods like the Annex, Rosedale, Riverdale, East York, and parts of Etobicoke contain thousands of homes that were built between 1900 and 1950 and may still have original knob and tube electrical systems.
Knob and tube wiring is not illegal in Ontario, but it is subject to strict conditions. Under the Ontario Electrical Safety Code, existing K&T wiring may remain in place as long as it has not been modified, is not in contact with insulation, and is in safe operating condition. The moment K&T wiring is extended, connected to modern devices, or covered with insulation, it must be replaced and brought up to current code.
In practice, most Toronto homes with K&T wiring have had modifications made over the decades that technically put them out of compliance. An ESA-licensed electrician can assess your specific situation.
Ontario home insurance providers have become increasingly strict about knob and tube wiring over the past several years. The reasons are straightforward: K&T has no ground wire, which means electrical faults have no safe path to ground. It was also designed for electrical loads of 30 to 60 amps at a time when the average home had a few light fixtures and an icebox. Modern Toronto homes routinely draw 150 to 200 amps.
Insurers have access to inspection records, permit histories, and home age data. If your home was built before 1950 and you have not filed an ESA permit for a full rewire, many insurers will flag your policy at renewal. Getting ahead of this before your renewal date gives you time to get quotes, plan the work, and avoid any lapse in coverage.
Our electrician network covers all Toronto neighbourhoods with high concentrations of older housing stock. This includes the Annex, Seaton Village, Roncesvalles, Parkdale, Junction Triangle, Bloor West Village, High Park, Swansea, East York, Leslieville, Riverdale, Danforth, Beaches, Forest Hill, Lawrence Park, Rosedale, Moore Park, Leaside, and all of Etobicoke and North York.
You can list a home with K&T wiring in Toronto, but it will significantly impact your sale. Buyers' home inspectors will flag it in their report, most mortgage lenders require insurance and many insurers now refuse K&T properties, and buyers will use it to negotiate a lower price or request a price reduction equal to the cost of rewiring. Rewiring before listing typically yields a stronger sale price and a smoother transaction.
We serve all Toronto neighbourhoods and surrounding municipalities.