Preparing an older Waterloo Region home to sell

Knob-and-tube and aluminum wiring in an older house

Two kinds of older wiring come up often. Both are legal to leave in place in many cases, and both can affect insurance, which in turn affects what a buyer can finance and close on.

Knob-and-tube. The Electrical Safety Authority (ESA) says on its knob-and-tube page that many insurers will not provide or renew coverage on homes with this type of wiring, because they consider it a higher risk. The ESA recommends hiring a Licensed Electrical Contractor to assess the home's electrical system. The Insurance Bureau of Canada (IBC) says in its guide to home history that knob-and-tube wiring may increase the risk of fire and electric shock, and that some carriers require an updated ESA certificate to keep coverage.

Aluminum wiring. The ESA's aluminum wiring page says aluminum wiring is permitted under Ontario's electrical code and is safe if proper connections and terminations are made without damaging the wire. It also says some insurers will not provide or renew coverage on homes without an ESA inspection, and it suggests a Licensed Electrical Contractor who understands aluminum repair techniques, who can arrange the inspection and obtain an ESA Certificate of Acceptance. Keep a copy of that certificate with your papers.

If you do not know what wiring your house has, an electrician can tell you. If you have already received an insurer's letter about the wiring, keep it, because a buyer's insurer may ask similar questions.

Galvanized and lead plumbing

The IBC page above says lead pipes are more likely to leak and crack, and that galvanized steel corrodes from the inside out, causing leaks. It advises property owners to contact their insurer about possible premium discounts for upgrading to copper or plastic plumbing. Your insurer or a plumber can say what applies to your house.

A buyer's inspector may note the pipe material visible at the water meter, in the basement and under sinks. If you know the pipes are original, say so to your agent early so the listing and your answers to buyers stay consistent. For lead or galvanized pipes, the IBC guidance says to contact your municipality about testing.

Radon testing in Region of Waterloo

Radon is a radioactive gas that can collect in basements regardless of how old a house is, so a buyer of any older house may ask. Health Canada's take action on radon page gives a guideline of 200 becquerels per cubic metre (Bq/m3) and recommends a long-term test kit, left in place for at least three months.

Region of Waterloo Public Health describes its guidance on its home health page. It says a result of less than 200 becquerels is the target, advises acting within two years at 200 or above and within one year above 600, and points to the Canadian National Radon Proficiency Program's find a professional directory. The Region's contact number there is 519-575-4400.

You do not have to test to sell. A seller who has a result in hand should give it to their agent and lawyer rather than leave it out of the conversation. If you have never tested, ask your agent how a buyer's inspector usually handles it.

Heritage conservation districts in Waterloo, Kitchener and Cambridge

A heritage conservation district is an area where changes to the outside of a building usually need the city's approval. Whether your house is inside one is public information, and it is worth knowing before you list, because it affects what a buyer can do with the house.

• Waterloo: the City's heritage permit page describes one district, MacGregor/Albert, between Seagram Drive, Bricker Avenue, Ezra Avenue, King Street and Caroline Street. It says properties in the district need a permit for most exterior changes, including demolition, additions, garages, driveways, windows, doors, rooflines, chimneys and trim. Re-shingling a roof and heating or cooling equipment usually do not need one. Individually designated properties and those on the municipal register are covered by the same page. Contact: heritage@waterloo.ca, 519-886-1550 ext. 78747.
• Kitchener: the City lists four districts, St. Mary's, Upper Doon, Victoria Park and Civic Centre, on its heritage properties and districts page. It says owners in them may require a heritage permit.
• Cambridge: the City's history and heritage page lists three districts, Blair Village, Dickson Hill and Main Street, with heritageinfo@cambridge.ca as the contact.

A heritage permit is a separate approval from a building permit. Ask your city's heritage staff whether a particular change needs one. If your house is inside a district or on a heritage register, tell your agent before you list so it is handled in the listing and the paperwork. Disclosure rules on heritage status are a lawyer's question.

GRCA regulated areas and flood plain

The Grand River Conservation Authority (GRCA) regulates river and stream valleys, floodplains, slopes and wetlands. Its Map Your Property tool shows regulated areas by address. The GRCA says the regulation applies whether or not an area is mapped, so treat the map as a starting point and ask the GRCA if the answer is not clear.

The GRCA's permits page says a permit is needed for work such as additions, garages, sheds, grading, fill, pools and septic systems in a regulated area. If you built a deck or shed years ago, check whether it needed a GRCA permit and whether you have one. Our guide to flood and home insurance when downsizing covers the insurance side of living near a flood plain.

Building permits and open permits

Older houses often have additions, finished basements, new kitchens or replaced furnaces that were done over the years. Some of that work needed a building permit. A permit that was opened and never closed is called an open permit, and it can come up in a buyer's lawyer's search of municipal records.

The City of Waterloo offers a Letter of Compliance. Its property version reports the status of issued building permits on file and any outstanding building code violations. The page lists the fee and the standard and rush turnaround times. For Waterloo, check that page or call the Building Department on 519-740-4613. For Kitchener and Cambridge, ask the city's building division what records it holds and how to request them.

If you find an open permit or work with no permit on file, do not guess about it. Ask the building department what is needed to close it, and ask your lawyer how to deal with it before the agreement is signed.

A pre-listing inspection as an option

Some sellers order a home inspection before listing, with a trade-off that is worth weighing:

• It can reveal issues on your schedule, so you can get quotes, choose what to repair and set your price with that in mind.
• It can also record a problem you now clearly know about, and what a seller knows can affect what must be disclosed.
• A buyer may still order their own inspection.

Whether to order one is a decision for you, your agent and your lawyer. Ask the agent how it has gone for similar houses and what the inspector will and will not look at.

If the house was rented

If you rented the house or a part of it, the City of Waterloo says on its residential rental licences page that new rental licensing requirements started on July 1, 2026, that houses, duplexes, townhouses and other long-term units need a licence, and that licences are renewed annually. A short-term rental licence is a separate requirement. Ask the City whether a licence applied to your situation and whether anything is outstanding, then raise it with your lawyer. Kitchener and Cambridge have their own rules, so ask those cities directly.

What to fix and what to disclose

There is no single answer, but the legal frame in Ontario is simple to describe. The Real Estate Council of Ontario (RECO) says in its bulletin on seller disclosure that a seller's duty to disclose a latent defect comes from case law, not from the Trust in Real Estate Services Act. A latent defect is one that would make a property unfit for habitation, dangerous or potentially dangerous, and is generally not apparent to someone exercising reasonable care. A patent defect, one that is visible on reasonable inspection, does not have to be disclosed, though a seller should not try to conceal it.

In practice, the sorting often looks like this:

• Known safety issues. Wiring, gas, structural movement or water entry you know about are the items to raise with your lawyer and agent first.
• Cosmetic issues. Worn flooring and dated finishes are visible to anyone walking through. Whether to fix them is a choice about how you want to market the house.
• Insurance-sensitive items. Old wiring and plumbing can limit what a buyer's insurer will write. Keep any insurer letters, ESA certificates and contractor assessments together.
• Work done without a permit. Ask the building department what is needed to resolve it before you list.

Our guide to Ontario seller disclosures covers latent defects, material facts and the optional seller property information statement in more detail. Whether a given problem counts as a latent defect is a legal question for your lawyer.

Paperwork to gather before you list

Buyers and their lawyers ask for the same records, and having them ready saves time:

• ESA certificates, electrician invoices and any insurer letters about wiring or plumbing.
• Permits, final inspection sign-offs and any GRCA or heritage permits.
• A radon test result, if you have one.
• A tax certificate. The City of Waterloo's tax certificate page says it shows yearly property tax amounts, payment history, penalties and any outstanding balance, that owners, people with power of attorney documents and listing agents with signed authorization can request one, and it lists the fee and how to apply. Cambridge and Kitchener each have their own process, so ask the city.
• Appliance and roof or furnace paperwork you still hold.

If you are selling a house that a parent owned, see helping a parent downsize in Waterloo Region. For how selling costs fit together, see costs and taxes and the net proceeds calculator.

Next steps

Walk your own house the way an inspector would, from the panel and the water meter to the basement walls, and write down what you find. The step-by-step downsizing guide shows where this fits in the full plan, and where to downsize covers the areas you may be buying into. Our resources page lists regulators and local services. When you want to talk with an agent, request an introduction. Introductions go to agents on the operating team at eXp Realty, so this is not a search of the whole market.