How much does aluminum wiring remediation cost in the GTA and is it worth it?

Aluminum wiring remediation in the GTA typically costs between $3,000 and $12,000 depending on the method used and the size of your home, and yes, it is absolutely worth it for both safety and insurance reasons. The two main approaches — AlumiConn connectors and COPALUM connectors — differ significantly in cost, and the right choice depends on your budget and long-term plans for the home.

AlumiConn connectors are the more affordable option, generally running $3,000 to $8,000 for a typical Scarborough or North York bungalow with aluminum branch circuit wiring. AlumiConn uses a set-screw mechanical connector with an anti-oxidant compound to create a safe junction between aluminum and copper wiring. Your electrician opens every outlet, switch, and junction box in the home, disconnects the aluminum wire, installs the AlumiConn connector, and connects a short copper pigtail from the connector to the device. This method is approved by the ESA and accepted by most Ontario insurance companies as a permanent remediation.

COPALUM connectors are the gold standard but cost more — typically $5,000 to $12,000 for the same home. COPALUM uses a cold-weld crimp that creates a permanent molecular bond between the aluminum and copper conductors. The connection is considered superior because there are no set screws to loosen over time and no oxidation path. However, COPALUM requires a specialized crimping tool that not all electricians carry, and the labour is more intensive. Some insurance companies specifically request COPALUM, so check with your insurer before deciding.

Aluminum branch circuit wiring was installed extensively in GTA homes built between roughly 1965 and 1975 — you'll find it across Scarborough, North York, Etobicoke, Mississauga, and parts of Brampton. The aluminum itself isn't inherently dangerous, but the connections are the problem. Aluminum expands and contracts more than copper with temperature changes, and it oxidizes when exposed to air, creating resistance at connection points. Over decades, this leads to loose connections that generate heat — and heat at electrical connections is how house fires start. The risk is highest at outlets and switches where connections are subject to repeated use and vibration.

Many Ontario insurance companies now require aluminum wiring remediation as a condition of coverage. If you're buying a home with aluminum wiring, your insurer may give you 30 to 90 days to complete remediation or face policy cancellation. Even if your current insurer hasn't flagged it, remediation protects your family and increases your home's resale value — buyers and their home inspectors will identify aluminum wiring, and many buyers walk away from homes that haven't been remediated.

An ESA permit is required for aluminum wiring remediation since your electrician is modifying connections at every device in the home. The permit ensures the work is inspected and code-compliant. Budget $150 to $300 for the permit on top of the remediation cost. Need help finding a licensed electrician experienced with aluminum wiring? Toronto Electrical Repair can match you with professionals in your area at no cost.