⚠️ Toronto insurance companies are actively cancelling policies on homes with active knob & tube wiring. Get a free assessment today →
Knob & Tube Wiring Replacement Toronto
Toronto's older housing stock — from the Annex's Victorian semis to the century bungalows of Roncesvalles and the pre-war detached homes of Leslieville — is full of original knob and tube wiring. It's outdated, uninsurable, and a fire risk. Our ESA licensed electricians safely replace it with modern, code-compliant wiring so your home is safe, insurable, and ready for today's electrical demands.
▲ Actual job photos
Why Knob & Tube Wiring Must Be Replaced
Found in Toronto homes built before 1950, knob and tube wiring was the standard of its era — but it was never designed for the electrical loads of modern life.
No Ground Wire
Knob and tube uses only hot and neutral — there is no ground wire, leaving your devices and people without fault protection.
Deteriorating Insulation
The rubber and cloth insulation becomes brittle and cracks with age. Once bare wire is exposed near wood framing, the fire risk is serious and often invisible.
Overloaded Circuits
These systems were sized for homes with minimal demand. EV chargers, air conditioners, and modern appliances push far beyond what these circuits can safely carry.
Insurance Cancellation
Most major Toronto-area insurers are refusing to renew policies on homes with active knob and tube — some cancelling coverage mid-term.
Buried by Insulation
Knob and tube needs open air to cool. When attic insulation covers it, heat is trapped — a code violation and a primary cause of house fires in older Toronto homes.
Reduced Home Value
Buyers and inspectors flag knob and tube immediately. It kills real estate deals, reduces appraised value, and can prevent buyers from securing standard mortgage rates.
⚠️ Is Your Insurer Threatening Cancellation?
We can provide a written assessment letter for your insurer and schedule your rewire promptly — so you don't lose coverage. We've helped dozens of Toronto homeowners resolve this situation.
Before & After: Real Rewiring Jobs
Actual photos from Kolji Bros knob and tube replacement projects in Toronto.
Before
After
New panel with clearly labelled, code-compliant breakers — installed as part of a full rewire
What We Find in Toronto Homes
Porcelain knobs, ceramic tubes, braided cloth insulation — if your Toronto home was built before 1950, this may still be in your walls, attic, and basement.
Finance Your Rewiring Project
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Installment loan estimate
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Our Knob & Tube Rewiring Services
From full-home rewires in the Annex to targeted circuit upgrades in Scarborough, we handle the entire scope of knob and tube replacement for Toronto homes.
Full Home Rewire
Complete replacement of all knob and tube wiring throughout your Toronto home. We run modern NMD-90 cable through existing walls with minimal drywall disruption wherever possible.
Partial Rewire & Targeted Circuits
If only specific areas still have knob and tube, we rewire those zones and integrate them with your existing modern wiring, bringing everything up to code.
Panel Upgrade
Most homes with knob and tube have undersized 60A or 100A panels. We frequently pair rewires with a 200A upgrade to support today's demands — including EV chargers.
ESA Permit & Inspection
All replacement work requires an ESA permit. We handle the application, coordinate the inspection, and provide you with the certificate of inspection for your insurer and records.
Insurance Assessment Letter
Need documentation fast? After our inspection we provide a written assessment of the knob and tube wiring scope — giving your insurance company exactly what they need.
GFCI & AFCI Upgrades
As part of the rewire we install GFCI protection in kitchens, bathrooms, and exterior locations and AFCI breakers where required by the current Ontario Electrical Code.
Attic Insulation Clearance
Attic insulation covering knob and tube is a code violation. We remove the wiring before any insulation work, allowing your home to be properly air-sealed and insulated.
Pre-Sale Rewire
A completed rewire with ESA certificate eliminates the most common deal-breaker flagged by buyers' inspectors and can meaningfully increase your sale price.
💰 Want to Know What It Costs?
Detailed pricing for knob and tube rewiring in Toronto — broken down by home size, scope, and whether a panel upgrade is needed.
View Full Cost Guide →How We Replace Knob & Tube Wiring
A structured, minimally invasive process — designed to protect your home and get you back to normal fast.
Free Assessment
We visit your Toronto home, inspect the panel, attic, basement, and wall cavities, and document all knob and tube wiring — including any amateur additions.
Written Quote
Detailed written quote covering labour, materials, permit fees, and any panel upgrades — before any work starts. No surprises.
ESA Permit
We apply for and obtain the required ESA permit. This is mandatory for all knob and tube replacement in Ontario.
Careful Rewire
Our team works attic to basement, pulling new NMD-90 cable and removing all knob and tube conductors while minimising drywall cuts wherever possible.
ESA Inspection
A licensed ESA inspector reviews the completed installation. Upon passing, you receive the official certificate of inspection your insurer needs.
Final Walkthrough
We test every outlet, switch, and fixture, label your new panel clearly, and walk through the work with you before we pack up.
Why Toronto Homeowners Choose Kolji Bros
We specialize in older Toronto homes — from Parkdale Victorians to East York bungalows. We know where knob and tube hides and how to replace it without turning your home into a construction zone.
ESA Licensed & Insured
ECRA/ESA licence #7015453. Proper permits, Ontario Electrical Code compliance, and a certificate of inspection your insurance company will accept.
Toronto Old-Home Specialists
We've rewired dozens of Toronto homes — Annex Victorians, Leslieville semis, Roncesvalles bungalows. We know the configurations and hidden junction boxes common in these houses.
Minimal Drywall Disruption
We use cable-fishing techniques and carefully planned routes to minimise holes in walls and ceilings — far less patching than most homeowners expect.
Transparent Pricing
Detailed written quote before work starts. No mid-project surprises. If we uncover something unexpected, we discuss it before proceeding.
Fast Turnaround
Most Toronto homes are fully rewired in 3 to 7 days, with power maintained to most circuits throughout the project so your family isn't displaced.
4.9★ Google Rating
54 Google reviews from real Toronto homeowners. Clean work, honest communication, and doing exactly what we say we'll do — read them before you call.
Toronto Neighbourhoods We Serve
We rewire knob and tube systems across all of Toronto — from the older Victorian streets of the Annex and Parkdale to the post-war bungalows of East York and Scarborough.
Not Sure If You Have Knob & Tube?
Call us or fill out our contact form. We'll schedule a quick inspection and tell you exactly what you have — no pressure, no obligation.
Call +1 866 565 5427What Toronto Homeowners Say
Real reviews from knob and tube rewiring projects across Toronto.
"Our insurer gave us 60 days to replace the knob and tube or lose our policy. Kolji Bros assessed the job quickly, gave us a clear quote the same week, and had the rewire and new panel done before the deadline. The ESA certificate arrived within days. Absolute lifesavers."
"We bought a 1930s semi in Leslieville and knew we had knob and tube but didn't realize how much. Kolji Bros found it in the attic, walls, and basement — including illegal splices from a previous owner. They rewired everything in 5 days with barely any drywall work. Professional from start to finish."
"Our Parkdale Victorian had knob and tube in about 60% of the house. Kolji Bros rewired it all and upgraded us to a 200A panel at the same time. The price was fair, the work was clean, and the house sale went through without any electrical issues thanks to the ESA certificate."
Knob & Tube Wiring FAQ — Toronto
Answers to the questions we hear most from Toronto homeowners dealing with knob and tube wiring.
Knob & Tube Replacement in Nearby Areas
We serve the entire Greater Toronto Area. Explore our dedicated service pages for cities and neighbourhoods close to Toronto.
Ready to Make Your Toronto Home Safe & Insurable?
Don't wait for your insurer to force the issue. Get a free in-home assessment from Toronto's knob and tube rewiring specialists — ESA licensed, fully insured, and experienced with older Toronto homes.