Does my old house need to be rewired?

Not necessarily — but a professional inspection is worthwhile for any home built before 1960. Signs that a rewire may be needed include: active knob and tube wiring, aluminum branch circuit wiring from the 1960s–70s, cloth-wrapped wiring, a 60-amp fuse panel, two-prong ungrounded outlets throughout, or a history of tripped breakers and flickering lights. If your home still has original wiring from 1960 or earlier, have a licensed electrician assess it before assuming it's safe.

How much does it cost to rewire a house in Canada?

Costs vary considerably depending on house size, number of floors, accessibility (finished vs. unfinished walls), and local labour rates. Rather than relying on a general figure, get itemized written quotes from at least two licensed electrical contractors, and confirm what each quote includes (new load centre, outlets, switches, permit fees, and drywall repair if needed).

Do I need a permit to rewire my house in Canada?

Yes — an electrical permit is required for rewiring work in Canada. The permit is typically pulled by the licensed electrician (not the homeowner, in most provinces), and the work must be inspected and approved by your provincial electrical safety authority (for example, the Electrical Safety Authority in Ontario or BC Safety Authority in BC). Confirm with your municipal building department and provincial authority what's required in your area. Unpermitted electrical work can create insurance and liability complications when you sell — confirm coverage implications with your insurer.

How long does it take to rewire a house?

Timelines vary based on home size, number of storeys, and whether walls are finished (requiring more patching). Ask your electrical contractor for an estimated schedule, including time for the permit inspection and final connections, and plan for some disruption — electricians need access to walls, ceilings, and the electrical panel throughout the work.

How do I find a licensed electrician for a rewire in Canada?

In Canada, electrical work must be done by a licensed electrical contractor. Look for electricians who hold a recognized Certificate of Qualification (such as 309A or 442A in Ontario, or the Red Seal / provincial equivalent elsewhere). Ask for their contractor licence number and verify it with your provincial electrical safety authority. Get at least two or three written quotes, confirm the quote includes the permit fee, and ask specifically about their experience rewiring older homes. Referrals from your insurer or a trusted home inspector are a good starting point.

Major Project

Whole-Home Electrical Rewiring

When it may be needed, what to consider, and how to do it right — for Canadian homes built before 1960

Quick Overview

Many Canadian homes built before 1960 still have original electrical wiring — or a patchwork of modifications made over decades. A full rewire replaces branch circuit wiring, brings the home up to current code, and can reduce the fire and insurance concerns associated with obsolete systems like knob and tube or 60-amp service.

Most relevant for:Homes built before 1960

Typical cost:Varies — get written quotes

Permit required:Yes, in Canada

Timeline:Varies by project scope

When a Rewire May Be Needed

• Active knob and tube wiring (pre-1950s)
• Aluminum branch circuit wiring (1960s–70s)
• 60-amp fuse panel — often inadequate for modern loads
• Cloth-wrapped wiring with brittle insulation
• Two-prong ungrounded outlets throughout
• Frequent tripped breakers or flickering lights
• Insurer requests an upgrade for coverage

The Permit Process

1. Hire a licensed electrical contractor — they typically pull the permit, not the homeowner (in most provinces)
2. Permit is filed with your provincial electrical safety authority before work begins
3. Rough-in inspection — inspector visits once wiring is in place but before walls are closed
4. Final inspection — inspector reviews the completed installation
5. Certificate of Inspection issued — provide this to your insurer

Understanding Costs

Rewiring costs vary by province, home size, accessibility, and whether walls need to be opened and patched. Costs vary by scope, region and contractor — collect written quotes from a few licensed electrical contractors and confirm whether the permit fee is included.

How to Hire a Licensed Electrician in Canada

What to Look For:

• Licensed electrical contractor (ask for their contractor licence number)
• Certificate of Qualification — 309A (construction) or 442A (industrial) in Ontario; Red Seal or provincial equivalent elsewhere
• Experience specifically with pre-1960 homes
• Willing to pull the required permit

Getting Good Quotes:

• Get at least two or three written quotes
• Confirm the quote includes permit fees and inspections
• Ask what happens if additional issues are found in the walls
• Ask for references from similar older-home rewire projects
• Check your provincial electrical safety authority's contractor lookup

Common questions

Frequently Asked Questions About Old Canadian Houses

Common questions from buyers and owners of older Canadian homes, answered with era context and pointers to the professionals who can confirm anything on a specific property.

Have a question not answered here? Browse our full inspection guide or explore all resources.

Whole-Home Electrical Rewiring

Quick Overview

When a Rewire May Be Needed

The Permit Process

Understanding Costs

How to Hire a Licensed Electrician in Canada

What to Look For:

Getting Good Quotes:

Frequently Asked Questions About Old Canadian Houses

AssessmentDoes my old house need to be rewired?

CostsHow much does it cost to rewire a house in Canada?

PermitsDo I need a permit to rewire my house in Canada?

TimelineHow long does it take to rewire a house?

HiringHow do I find a licensed electrician for a rewire in Canada?