Most buyers fall in love with the kitchen. I’m looking at the panel, the pipes, and the property line. After helping clients through a lot of GTA deals, I’ve learned that the expensive surprises almost never show up in the listing photos. They show up after closing — when the insurer balks, the water pressure drops, or a buyer three years down the road uses the same issue to grind your resale price.
Here are the 10 things I check on every deal before I let a client write an offer. Bookmark this one — it’s the list that protects your money.
1. Knob & Tube Wiring
This is the one that can quietly kill your financing. Many insurers won’t write a policy on a home with active knob & tube wiring, and no insurance means no mortgage — lenders require coverage as a condition of funding. So a “wiring problem” can actually become a deal problem.
If it’s present, get a rewiring quote before you commit. Full rewiring on a Toronto home can run several thousand to tens of thousands depending on size and access. Better to price it now than discover it the week before closing.
2. Low School Rating
Even if you don’t have kids, the school zone matters — because your future buyer might. A weak school catchment quietly shrinks the buyer pool, and families rarely compromise on it. That’s a smaller audience competing for your home when you go to sell, which puts downward pressure on price.
I always check the catchment and the ratings before we write, not after.
3. Backing onto a Rail Line or Highway
The view might be fine. The noise is forever. Homes backing onto rail corridors or majorhighways typically carry a 5–10% discount versus comparable interior lots — and that discount follows the property. You’ll pay less going in, but you’ll also collect less going out, and the pool of buyers willing to tolerate it is smaller. Sometimes the math works; just go in with eyes open.
4. No Garage or Private Parking
In most of the GTA, parking isn’t a luxury — it’s a filter. Families, investors, and older buyers will all rule out a home with no garage or dedicated parking. That’s three big buyer segments gone at once, which directly shrinks your resale pool. Street-permit parking is not the same thing, and the market knows it.
5. Hydro Transmission Lines Behind the House
Set the health science aside — the studies are genuinely mixed. What isn’t mixed is buyer perception. A lot of buyers feel uneasy about large transmission lines behind a property, and your future buyer will feel the same way. Perception is what sets price, and that stigma tends to discount the home permanently.
6. Galvanized Steel Plumbing
Here’s the quick test: run two taps at once. If the pressure collapses, you may be looking at old galvanized steel pipes corroding from the inside. Replacing the supply lines in a typical home runs roughly $15K–$20K — and savvy buyers recognize it the moment they see those pipes in the basement. It’s both a real cost to you and a negotiating lever for whoever buys next.
7. Only One Bathroom
This sounds minor until you go to sell. A family with two kids often won’t even book the showing on a one-bathroom home — it’s filtered out before the front door opens. Adding a second bath is doable, but check whether there’s a logical spot for it (plumbing stack, layout, headroom) before you assume it’s an easy fix.
8. Buried Oil Tank
This is the one that can become a six-figure problem. Older homes sometimes have an oil tank that was simply abandoned in the ground and forgotten. If it has leaked, the soil contamination becomes your legal liability the moment you own the property — and remediation can run from thousands well into six figures depending on the spread, pluspotential legal exposure.
Always ask, always look, and if there’s any sign of one, get it investigated before closing.
9. Heritage Designations, Easements & Covenants
These are the invisible strings attached to a title. A heritage designation can stop you from rebuilding or even renovating the way you’d like. An easement may mean a strip of “your” land isn’t actually yours to build on or fence off. Restrictive covenants can dictate what you can and can’t do with the property.
None of this shows up in a walkthrough — it shows up in the title search and the property file. That’s exactly why I order them early.
10. Asbestos & Moisture / Mold
Common in pre-1980 GTA homes. Asbestos sitting undisturbed is usually fine; the problem is when a renovation disturbs it, because safe removal is expensive and disruptive. Mold is the same story — remediation costs add up fast, and any sign of it is a red flag for every future buyer. If a home is older or shows water staining, this gets a proper look before we proceed.
The Bottom Line
Most buyers find out about these issues after they’ve signed. By then, the leverage is gone. The whole point of checking them up front is simple: either you negotiate the cost into the price, or you walk away clean — but you do it on your terms, not the seller’s.
Buying in the GTA? Let’s talk before you write that offer.
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This article is for general information only and is not professional, legal, financial, or insurance advice. Costs, coverage, and conditions vary by property and individual circumstances — always confirm with a qualified home inspector, insurer, lawyer, and your real estate professional before making any decision. Sid Siddiqui, Broker, Royal LePage Terrequity Realty. Not intended to solicit buyers or sellers currently under contract with another brokerage.