Sellers in Bedford Park, Lawrence Park North, and the rest of what was once the independent Town of North Toronto tend to worry about the wrong number. They watch comparable sales, they ask what the house next door closed for, and they price accordingly. The number that actually stalls a deal here rarely shows up in a comparable sales report. It shows up in an insurance underwriter's file, weeks after the offer is accepted, when a buyer discovers their lender will not fund a closing until the wiring problem the home inspector flagged gets resolved.

This is not a hypothetical. North Toronto's original housing stock was built almost entirely inside a specific window, and that window happens to overlap exactly with the era of knob-and-tube wiring and clay sewer laterals. Understanding that overlap, and what Ontario actually requires a seller to say about it, matters more to a smooth closing than a paint color or a staged kitchen.

An 1890s Town Built Its Own Timeline

North Toronto was incorporated in 1890 through the amalgamation of Davisville Village, Eglinton Village, and Bedford Park Village, and it stayed independent until Toronto annexed it in 1912. The neighbourhoods that grew out of that merger still carry their village names. Bedford Park's original housing stock was built mostly in the 1920s, 30s, and 40s, on streets platted after the Metropolitan Street Railway reached Yonge and Lawrence in 1890. A few kilometres east, Lawrence Park, one of Toronto's first planned garden suburbs, built most of its homes between 1910 and the late 1940s in English Cottage, Tudor Revival, and Georgian styles.

That means a large share of the detached and semi-detached homes changing hands in this area today were built in a fifty-year band running from roughly 1890 to 1945. It is a fact worth knowing before an offer is signed, not after a home inspector finds something in the attic. That build window is also, almost precisely, the operating life of knob-and-tube wiring, which was the standard residential electrical system in North America from about 1880 into the late 1940s.

What an Insurer Does the Moment It Sees Knob-and-Tube

Here is the part that catches sellers off guard. The problem with knob-and-tube wiring in 2026 is not primarily a safety argument. It is an insurance argument, and insurance is what stands between an accepted offer and a funded closing.

Several of Canada's largest home insurers, including Aviva, Intact, TD Insurance, Wawanesa, and Belair Direct, will not bind a new policy on a home with active, energized knob-and-tube wiring. A smaller group of insurers will still write a policy, but only with a surcharge running roughly $800 to $2,000 a year and a visible-wiring inspection requirement. A financed purchase generally cannot close without bound insurance, which means undisclosed or unresolved knob-and-tube can derail a deal that has already cleared financing and inspection conditions on price.

The fix, when one is needed, is not cheap but it is well defined. A full rewire of a typical two-storey Toronto home runs $8,000 to $15,000, with larger or more complex century homes reaching $20,000 to $30,000, according to contractors who specialize in this work across older Toronto housing stock. The deliverable that actually solves the insurance problem is an Electrical Safety Authority Certificate of Inspection. Partial removal, meaning visible basement circuits only, does not satisfy most insurers and does not carry the same certificate, a distinction contractors who work through the ESA permit process point to as the most common misunderstanding among owners of older homes.

For a seller, the practical question is not whether the wiring needs to be perfect. It is whether you know, before you list, what an electrician would find and what an insurer would say about it. A pre-listing electrical assessment costs a fraction of what a stalled closing costs in carrying costs and lost momentum.

The Second Surprise Is Usually Underground

Wiring gets the attention because it shows up on an inspection report. The other issue common to homes from this era rarely does, because it is buried under the lawn.

Many older Toronto homes still drain through original clay sewer laterals, and tree roots find these pipes appealing. A sewer camera scope, which most standard home inspections do not include, runs roughly $300 to $500. A blocked or collapsed lateral, if one is found, can cost $10,000 to $25,000 to replace, a range confirmed by renovation professionals who work through century-home priority lists across Toronto's pre-war neighbourhoods. Mature tree-lined streets are one of the things that make Bedford Park and Lawrence Park North desirable to buyers. The same mature trees are the reason a camera scope is worth the few hundred dollars before listing rather than after a buyer's inspector orders one during their conditional period.

What Ontario Actually Requires You to Say

Sellers sometimes assume a disclosure form is mandatory, and buyers sometimes assume the absence of one means something is being hidden. Neither assumption holds up in this market.

The Seller Property Information Statement, or SPIS, is an Ontario Real Estate Association form on which a seller can voluntarily answer detailed questions about a property's condition, including wiring type and sewer history. It has never been legally required in Ontario, and the Toronto market has largely moved away from using it, since real estate lawyers frequently advise sellers against signing one. The reasoning is straightforward: an SPIS does not reduce what a seller must disclose by law, but it does create a written record that a buyer can later point to if any answer turns out to be wrong, even by honest mistake.

That does not mean sellers can stay silent about everything. Ontario law distinguishes between a patent defect, which is visible or discoverable during a normal inspection, and a latent defect, which is hidden and could affect a buyer's ability to live in the home safely. Real estate publications that track disclosure law note that latent, safety-affecting defects generally must be disclosed regardless of whether a seller signs any form. Since December 2023, Ontario's Trust in Real Estate Services Act has also tightened the requirement that known latent defects be disclosed in writing and acknowledged by the buyer within the purchase agreement itself.

What this means in practice for a North Toronto seller: you are not choosing between full disclosure and no disclosure. You are choosing between an optional, detailed form that can create liability over old, forgotten repairs, and a narrower legal obligation to disclose what you actually know about safety-related issues. Sellers weighing that decision typically work through it with a real estate lawyer rather than guessing, a point Ontario legal commentary on the SPIS makes clearly: signing the form does not reduce what you must disclose, it just changes what you are on the hook for if a detail turns out wrong.

Getting Ahead of the Inspection, Not Behind It

None of this argues for gutting a century home before putting a sign on the lawn. Many buyers in Bedford Park, Lawrence Park North, and Teddington Park are specifically drawn to original brick facades, deep lots, and the mature streetscape that came with Wilfrid Dinnick's early twentieth-century garden suburb plan. What changes the outcome of a sale is not whether the home is old. It is whether the seller already knows what an inspector, an insurer, and a lender's underwriter are going to ask about, and has an answer ready instead of a scramble.

That means an electrical assessment and a sewer camera scope before listing, not after an accepted offer. It means deciding, with legal advice, how to handle disclosure of anything material you already know. And it means pricing the home with those costs already accounted for, rather than negotiating them under pressure during a financing condition with a closing date already circled on the calendar.

This is the kind of preparation that separates a listing that closes on schedule from one that reopens negotiations two weeks before closing. For a home built in the 1920s or 1930s in one of North Toronto's original neighbourhoods, it is not optional homework. It is the difference between a transaction and a delay.

A Few Questions Before You List

Does every North Toronto century home have knob-and-tube wiring? Not necessarily. Many homes have been partially or fully rewired over the decades, sometimes during a past renovation. The only way to know for certain is an assessment by a licensed electrician who can check the panel, attic, and basement for visible knob-and-tube and flag areas that may still be hidden behind walls.

Do I have to rewire the whole house before selling? Not always. Some buyers proceed with an insurer's surcharge or a short-term bridge policy while planning to rewire after closing. What matters is that the seller knows the wiring status going in and can speak to it accurately, since an inaccurate statement carries more risk than silence.

Is a SPIS required to sell a home in Toronto? No. It remains entirely voluntary in Ontario, and most sellers in this market choose not to complete one on the advice of counsel. Sellers still have a legal obligation to disclose known latent defects that could affect a buyer's safety, separate from whether an SPIS form exists.

Selling a home built in North Toronto's original development era comes with a specific set of questions that a comparable sales report will not answer. Shaheen & Company works through electrical assessments, sewer scopes, and disclosure decisions with sellers before a home ever goes on the market, so the surprises get handled on your timeline instead of a buyer's.