A full knob and tube removal in Winnipeg typically costs between $8,000 and $15,000 for a complete rewire. That range covers a standard-sized character home — the kind you find across River Heights, Crescentwood, Wolseley, and the West End. Smaller bungalows under 1,000 square feet can come in closer to $6,000 to $10,000. Larger two-storey homes or homes with complex layouts, finished walls throughout, and limited access can push past $18,000. If the home also needs an electrical panel upgrade — and most homes with knob and tube do — add another $1,800 to $3,500 on top of the rewire. For the full breakdown on that piece, see our panel upgrade cost guide.
An estimated 30,000 to 35,000 Winnipeg homes still contain knob and tube wiring, mostly in neighbourhoods built before 1940. Insurance companies in Manitoba have been tightening their stance on these homes for years — some now refuse to write new policies entirely until the wiring is removed. That insurance pressure, combined with the genuine fire risk of 80-plus-year-old wiring, is what drives most homeowners to finally get the work done. Here’s what the project actually involves and what shapes the cost.
| Home Size | Typical Cost (Rewire Only) | Notes |
|---|---|---|
| Small bungalow (under 1,000 sq ft) | $6,000 – $10,000 | Fewer circuits, often easier attic and basement access |
| Mid-size home (1,000 – 1,500 sq ft) | $8,000 – $15,000 | Most common range for Winnipeg character homes |
| Large two-storey (1,500+ sq ft) | $12,000 – $20,000+ | More circuits, more wall fishing, longer timeline |
| Common Add-Ons | Typical Cost |
|---|---|
| Panel upgrade (100A to 200A) | $1,800 – $3,500 |
| Full service upgrade (panel + meter + service entrance) | $2,500 – $4,500 |
| Drywall and plaster repairs (patching access holes) | $500 – $3,000+ |
| Additional circuits (EV charger, AC, basement suite) | $200 – $500 per circuit |
These are budgeting ranges based on typical Winnipeg projects. Every character home has its own surprises — the only way to get an accurate number is a thorough on-site assessment by a licensed electrician who opens up a few outlets and traces the existing wiring.
Knob and tube wiring uses individual hot and neutral wires strung through porcelain knobs and tubes — a method that was standard in homes built from the early 1900s through the late 1940s. The wires are insulated with cloth or rubber that deteriorates over decades, leaving bare copper exposed. The system has no ground wire, which means no protection against electrical faults in the way modern wiring provides.
A full rewire replaces every knob and tube circuit in the house with modern NMD90 cable — grounded, properly insulated, and rated for current electrical loads. Here’s what the process looks like from start to finish.
The first day is typically spent mapping out the existing wiring. The electrician opens outlets, switches, and junction points to trace what’s original knob and tube, what’s been partially updated over the years, and where previous homeowners or handymen may have spliced modern wire into the old system in ways that don’t meet code. This detective work matters — it determines the actual scope of the job.
From there, new NMD90 cable gets fished through walls, ceilings, and floors to replace every knob and tube circuit. The electrician cuts small access holes — typically 4 inches round — through the walls and ceilings to route the new wire. In homes with lath and plaster walls, which is most of River Heights and Wolseley, drilling these access holes requires care because lath can crack and pull away from the studs if the plaster is brittle. Every outlet, switch, and light fixture gets reconnected to the new grounded wiring.
Once the rewire is complete, the work needs to meet the Canadian Electrical Code requirements that apply during a renovation of this scope. That includes arc fault circuit interrupters (AFCI breakers) on bedroom circuits, tamper-resistant receptacles, GFCI protection within 1.5 metres of any sink, and hardwired smoke detectors on every floor. These code requirements add to the cost but they’re not optional — the city inspector checks for them.
After the electrician finishes, the City of Winnipeg inspector comes through to verify everything meets code. Once it passes, the electrician provides a certificate confirming the knob and tube has been removed and the home is rewired — this is the document your insurance company needs.
This is the single biggest cost factor. Homes with unfinished basements and accessible attics let the electrician reach most of the wiring runs without cutting into finished walls. That cuts hours off the job. A Crescentwood character home with a fully finished basement, plaster walls on every level, and a finished attic bedroom is a different story — every circuit requires more access holes, more fishing, and more time.
A single-storey bungalow has wiring runs between two accessible planes — the attic above and the basement below. Fishing wire between the two is relatively straightforward. A two-and-a-half-storey home in River Heights with a finished attic, a main floor, and a basement has wiring runs that pass through multiple floor and ceiling assemblies. Each additional storey adds complexity and time.
Many older Winnipeg homes have been partially rewired over the decades — a kitchen renovation here, a basement development there. Sometimes that earlier work was done properly. Often it wasn’t. Finding modern wire spliced into knob and tube circuits with electrical tape instead of proper connectors, or new wire run alongside live knob and tube inside the same wall cavity, is common in homes that have changed hands several times. Sorting out which circuits are safe and which need replacing adds time to the assessment and sometimes expands the scope of the rewire mid-project.
If your home still has knob and tube, there’s a strong chance the electrical panel is also original or close to it — a 60-amp fuse panel that can’t support modern loads. Most knob and tube removals include a panel upgrade to 200 amps as part of the project. If the service entrance cable and meter base also need replacing, that pushes the total higher. Bundling the panel upgrade with the rewire is more cost-effective than doing them as separate projects since the permits, Manitoba Hydro coordination, and labour overlap.
Knob and tube wiring was designed to be air-cooled — it relies on open air around the conductors to dissipate heat. When blown-in insulation gets packed around active knob and tube wires, it traps heat and significantly increases fire risk. If your attic has had insulation blown in over top of live knob and tube — which is common in Winnipeg homes that had energy retrofits done without an electrical assessment first — the insulation may need to be disturbed or partially removed to safely access and replace the wiring.
Wolseley has a high concentration of character homes from the 1900s through the 1930s. A typical situation: a 950-square-foot bungalow with an unfinished basement and an accessible attic. The home is on a 60-amp fuse panel, and the insurance company has told the new owner they need the knob and tube removed and a panel upgrade done before they’ll issue a policy. Most of the wiring is original, with one previous partial update in the kitchen. The basement and attic access make the fishing relatively straightforward. This is a full rewire plus panel upgrade: expect $8,000 to $12,000 for the rewire and $2,000 to $3,000 for the panel and service upgrade — roughly $10,000 to $15,000 total.
River Heights is the neighbourhood with the highest density of knob and tube in Winnipeg. Many of these are larger two-storey homes — 1,400 to 1,800 square feet, with lath and plaster walls throughout and a partially finished basement. The homeowner has been in the house for years and is finally doing the rewire because their insurer sent a non-renewal notice. The home has had piecemeal electrical work done over decades — some copper circuits mixed with live knob and tube, an updated kitchen but original wiring everywhere else. The lath and plaster makes access harder, the mixed wiring adds assessment time, and the home’s size means more circuits to replace. Full rewire plus panel upgrade: $14,000 to $20,000 depending on how many surprises turn up in the walls.
The West End has a dense mix of pre-war homes and a lot of rental stock. An investor buys a 1,100-square-foot one-and-a-half-storey home as a rental property. The home inspection flagged knob and tube, and the lender’s insurer won’t cover the property until it’s removed. The home is vacant, which is actually ideal — no furniture to work around, easier access, faster cleanup. The half-storey upstairs has sloped ceilings that limit attic access in some areas. Full rewire, panel upgrade, and a few additional circuits for code compliance: $11,000 to $16,000.
The most common reason Winnipeg homeowners remove knob and tube isn’t because they’ve had an electrical problem — it’s because their insurance company forced the issue. Here’s what’s happening in the Manitoba insurance market.
Most major insurers in Manitoba now require either a full removal of knob and tube wiring or, at minimum, a certified electrical inspection confirming the wiring is in safe condition before they’ll issue or renew a policy. Some insurers refuse coverage entirely on homes with any active knob and tube, regardless of its condition. This has accelerated in the last few years, and it’s the primary reason most homeowners contact an electrician about knob and tube — the letter from the insurance company leaves them no choice.
For home buyers in older Winnipeg neighbourhoods, this often becomes urgent at the worst possible time. You’ve put in an offer on a character home in Crescentwood, the home inspection finds knob and tube, and now your insurer tells you they won’t cover the property until it’s removed. You need the rewire done before closing, or you need to negotiate it into the purchase price. Either way, the knob and tube has to go — it’s not something you can defer indefinitely once the insurance company knows about it.
Once the rewire is complete and the electrician provides the certificate of completion, your insurer has what they need to issue standard coverage. Some homeowners find their premiums drop after the rewire as well, since the property is no longer flagged as a higher-risk electrical situation.
Some homeowners ask whether they can remove only part of the knob and tube to satisfy their insurer, leaving some circuits in place to save money. The short answer: it depends on the insurer and the specific situation, but a full removal is almost always the better investment.
Partial removal means you’re paying mobilization costs, permit fees, and inspection time for a job that doesn’t fully solve the problem. The remaining knob and tube will eventually need to come out — either because the insurer tightens their requirements further, because you sell the home and the buyer’s insurer demands it, or because the wiring deteriorates to the point where it becomes a genuine hazard. Doing the job in stages costs more in total than doing it all at once.
There’s also a practical problem: once an electrician starts tracing circuits in an older home, they frequently discover that “partial” knob and tube is more extensive than it appeared. A circuit that looked like it had been updated turns out to have modern wire spliced into knob and tube inside a wall cavity. What was scoped as a partial removal becomes a near-full rewire once the actual wiring picture emerges.
If budget is a constraint, talk to your electrician about what the insurer specifically requires. Some will accept a certified inspection showing the knob and tube is in safe condition as an interim measure while you plan and budget for the full removal. But the full removal is where you should be heading.
If you’re buying a home with knob and tube, the ideal time for the rewire is before you move furniture in. An empty house is significantly easier and faster to work in — the electrician can access every room without moving belongings, laying down protective coverings, or working around a family’s daily routine. If you can schedule the rewire during the gap between closing and your move-in date, the project will go faster and the cleanup will be simpler.
If you already live in the home, the work is still entirely doable — you just need to plan for a few days of disruption. The electrician will be cutting access holes, running wire through walls and ceilings, and your power will be off for portions of the work. Plan to keep essentials accessible and have a conversation with your electrician about the daily schedule before work begins.
Once the rewire is done, you’ll need patching and painting on the access holes. Some electricians can coordinate this with a drywaller, or you can arrange it separately. The 4-inch access holes are straightforward to patch — a piece of drywall cut with the same hole saw, some mesh tape, and joint compound. Budget $500 to $3,000 for the patching and painting depending on how many holes were needed and whether you’re doing it yourself or hiring it out.
Most full rewires take three to seven working days depending on the size and complexity of the home. A small bungalow with good access can be done in three to four days. A larger two-storey with lath and plaster walls and a finished basement can take a full week or longer. Your electrician will give you a timeline estimate after the initial assessment — expect it to be a range, because surprises in the walls can extend the schedule.
It’s getting harder. Most major insurers in Manitoba now require either removal or a certified inspection before issuing coverage on homes with knob and tube. Some refuse coverage entirely. If you’re buying a home with knob and tube, confirm your insurer’s requirements before closing — discovering you can’t get insurance after you’ve signed is a situation you want to avoid. After the rewire, your electrician provides a certificate that confirms the knob and tube has been removed and the home is up to code, which satisfies insurer requirements.
Not automatically, but in most cases you’ll need one. Homes built in the knob and tube era typically have 60-amp fuse panels that can’t support the modern circuits being installed during the rewire. Upgrading to a 200-amp breaker panel during the rewire is standard practice and more cost-effective than doing it as a separate project. Your electrician will assess the panel during the initial evaluation and include the upgrade in the quote if it’s needed. See our panel upgrade cost guide for detailed pricing on that component.
Yes. The electrician needs to cut small access holes — typically 4 inches in diameter — through walls and ceilings to fish new wire through the structure. A skilled electrician keeps the number of holes to a minimum and places them strategically, but there will be patching required after the work is done. In lath and plaster homes, the plaster can sometimes crack beyond the access hole if it’s brittle, which means a slightly larger patch. Budget for drywall patching and painting as a separate line item — either do it yourself or hire a drywaller to handle it after the electrical inspection passes.
The easiest signs to spot are two-prong outlets (no ground hole) and the absence of junction boxes on light fixtures. If you can see exposed wiring in an unfinished attic or basement, knob and tube is distinctive — two separate wires run parallel along porcelain knobs, with porcelain tubes protecting the wire where it passes through joists or studs. The wire itself is wrapped in cloth or rubber insulation that may be darkened, cracked, or flaking. That said, many homes have been partially updated over the years, so some circuits may be modern while others are still knob and tube behind finished walls. An electrical inspection is the only reliable way to determine how much knob and tube remains in the house.
Both. Undisturbed knob and tube wiring in good condition can function safely — the system itself wasn’t inherently flawed when it was new. The problem is that after 80-plus years, the rubber and cloth insulation deteriorates, leaving bare copper exposed inside wall cavities. The system has no ground wire, which means faults that a modern system would safely interrupt can instead create shock and fire hazards. Add in decades of amateur modifications, blown-in insulation packed around conductors that were designed to be air-cooled, and electrical loads the system was never designed to carry, and the risks are real. The insurance issue exists because the fire risk is genuine — insurers aren’t being arbitrary about this one.
If your insurer is asking questions about knob and tube, or you’re buying a character home in one of Winnipeg’s older neighbourhoods, get in touch for an honest assessment. We’ll trace what’s in the walls, tell you exactly what needs to come out, and give you a clear number before any work starts.
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