Home insurance for older homes in Canada: wiring, pipes and other red flags

Older homes · 7 min read

General information only. This guide explains, in general terms, how Canadian home insurers look at the older systems inside an older house. It is not insurance advice, it does not recommend any insurer or product, and it is not written by a broker or agent. Insurers set their own rules, and those rules differ — confirm anything that matters with your own insurer or broker, and treat your policy documents as the final word.

The direct answer: three insurer responses, and only one of them is a refusal

Start with the one wiring finding that stops more purchases than any other. On knob-and-tube wiring, the Insurance Bureau of Canada position, as Rates.ca reports it, is that insurers split three ways: some will not insure a home with knob-and-tube at all, some give the owner a set time to replace it, and others provide coverage after a safety inspection. The same system, in the same country, can therefore mean a decline, a deadline, or an inspection — depending entirely on which insurer is asked. That spread is the single most useful fact about insuring an older home, because it means a first refusal is information about one insurer, not a verdict on the house.

There is also a price tag attached to the hardest flag. Replacing knob-and-tube wiring ranges from $7,000 to $14,000 or more, depending on the size of the home (Rates.ca, checked October 25, 2026). Hold that number in mind while reading the triage table below: it is the one remediation cost the sources price, and it is large enough that the order in which you fix things matters.

Read the table as a ranking, not a checklist. The wiring row can end the conversation. The plumbing and heating rows shape the price and the questions. Confusing the two groups — treating every flag as a refusal, or every flag as a surcharge — is how buyers either walk away from insurable houses or walk into uninsurable ones.

Electrical: the flag with three different answers

Knob-and-tube deserves its own section because its consequences vary the most. iSure's summary matches the IBC picture from the owner's side: knob-and-tube can be insured, but some insurers require updating first, while others insure with restrictions or higher premiums. Two practical points follow. First, an inspection is not the end of the cost story: Rates.ca notes that homes which pass inspection will still likely face higher premiums, so an owner who budgets only for the inspection has under-budgeted. Second, the replacement decision is a large one — $7,000 to $14,000 or more is a renovation-sized cheque — and it should be made with an insurer's actual answer in hand, not on the assumption that every insurer demands it. One insurer's deadline is another insurer's surcharge.

The 60-amp service sits in a different category. Cluett Insurance, describing what underwriters focus on in older Atlantic Canadian homes, lists electrical wiring — knob-and-tube or 60-amp service — as the first of three focus areas. The sources do not attach a decline, a deadline, or a specific surcharge to a 60-amp service, and this guide will not invent one. What the record supports is narrower and still useful: if the home has a 60-amp service, expect an insurer to look at it, and put the electrical questions at the top of the list you bring to a broker before you commit to a purchase or a renewal.

Plumbing: the pipes that corrode from the inside

Cluett's second focus area is plumbing: galvanized or polybutylene pipe, which the brokerage describes as prone to corrosion and burst pipes. That pairing — corrosion and bursting — explains the insurer's interest in plain terms. A wiring problem is a fire concern the insurer prices at the start; a corroding pipe is a water claim waiting for a date, and water damage is the kind of loss that grows worse the later it is found.

Plumbing is also the one flag here with a documented upside. iSure notes that replacing galvanized plumbing can lower premiums. That single fact changes the repair conversation: a plumbing replacement is not only a cost paid to satisfy an insurer, it is the remediation most directly tied, in the sources checked, to money back on the premium side. No source checked prices a plumbing replacement, so there is no honest per-dollar comparison to print here — the figure is a gap, and a quote from a plumber is how a household fills it for its own house.

Heating and oil tanks: the inspection flags

Cluett's third focus area is heating: an old oil furnace or tank. The sharpest warning in the sources concerns the tank outside the house. An aging or improperly installed outdoor oil tank is a major environmental spill risk, and insurers check three specific things — the tank's age, its location, and whether it was professionally installed. Those three checks give an owner a short, concrete preparation list: know the tank's age before the insurer asks, and keep whatever installation records exist somewhere findable.

Wood heat carries a different, more procedural requirement. iSure notes that wood-burning stoves generally need a WETT inspection — an inspection of the installed appliance and its venting — before insurers will treat the home as a standard risk. A stove is therefore rarely a pricing surprise on its own; it is a paperwork step, and the household that arranges the inspection early removes the delay rather than arguing about it at renewal time.

Fix order: insurance impact per dollar spent

Most older homes carry more than one of these flags, and few households can fix all of them in one year. The decision framework below sequences the work by the consequence each flag carries, using the one priced figure the sources provide:

1. Resolve the decline risk first. If any insurer has named knob-and-tube as a decline or a deadline, that answer outranks every other repair. Get more than one insurer's response before paying for a rewire — the three-way split means a second answer may be an inspection and a surcharge instead of a $7,000 to $14,000-plus replacement.
2. Clear the inspection flags next. The WETT inspection for a wood stove and the age, location and installation answers for an oil tank are information problems before they are money problems. They are the cheapest items on this list to move from unknown to documented.
3. Put plumbing replacement where the premium benefit is. Replacing galvanized plumbing is the fix the sources tie to a possible premium reduction, which makes it the natural candidate for the first large planned spend after coverage is secure — priced by a plumber's quote, since no published figure was found.
4. Ask about the 60-amp service in the same conversation. Because underwriters focus on it without a single published consequence, the right move is a direct question — what does this insurer require, if anything — rather than an assumed upgrade.

The framework has one honest limit: it ranks insurance consequences, not home safety. A pipe that is actively leaking or a tank that is visibly failing is a repair-first problem on its own terms, whatever an insurer thinks of it.

Buying an older home: get the quote before the offer firms up

Every section above is cheaper to use before a purchase than after one. A workable order of operations:

1. List the home's systems by the table above — wiring type, electrical service, pipe material, heating and tank, any wood stove — from the listing, the seller's disclosures and a home inspection.
2. Take that list to an insurer or broker and ask which response each item draws: decline, deadline, inspection, or a price effect.
3. If knob-and-tube is present, ask at least two insurers. The documented three-way split makes the second quote a money-saving step, not a formality.
4. Price the deadline items into the offer. A $7,000 to $14,000-plus rewire that an insurer requires on a set timeline is a real cost of buying that house, and it belongs in the arithmetic before the offer is firm.

What success looks like: before you own the home, you hold at least one insurer's written answer naming each flagged system and what it requires — and no requirement on that list is a surprise discovered after closing.

General information only — not insurance advice. This site is not a broker, agent, or insurer. Requirements for older wiring, plumbing, heating and wood stoves vary by insurer and province, and every claim turns on its facts and the policy wording. Talk to a licensed insurance professional about your situation, and treat your own policy document as the final word.

— Penny Hughes, Money Writer — Saving Desk