Unionville, Markham Home Inspection Market Report — July 2026

Unionville has this magnetic pull that you can feel the moment you drive down Main Street past the old mill and into the historic core. The mature trees, the century streetscapes bleeding into those polished 1990s subdivisions off Carlton Road and Unionville Gate, the proximity to Toogood Pond — people want to be here, and right now in July 2026, a lot of them are competing hard to make it happen.

That competition is exactly what I want to talk to you about, because the numbers behind it tell a story that every buyer in this market needs to hear before they sign anything.

There are 2,019 active listings sitting in Unionville and the broader Markham area right now, with an average price of $1,358,147. Homes are sitting on market an average of 62.1 days. That's not a frenzied sellers' market where everything evaporates in a weekend, but it's still competitive enough that buyers feel pressure, and pressure is where mistakes get made. When someone sees a well-staged home in one of those 1990s subdivisions near William Berczy Public School and convinces themselves they need to move fast, the first thing that gets sacrificed is usually the home inspection condition.

Waiving inspection conditions in July is particularly risky, and not for the reason most people think. Summer heat actually conceals moisture. Basements that weep all spring look completely dry in July. Efflorescence on the foundation wall fades. That musty smell that was screaming at you in April has aired out. The house presents better than it actually is, and you have no way of knowing that standing in the living room on a hot afternoon with the windows open.

The homes in this area that worry me most are the ones sitting in that 1990s and early 2000s construction window, which accounts for a significant portion of what's listed right now. That era has a 14% high-risk rating and carries a risk score of 21 out of 100 on the inspection scale. Those numbers might sound modest until you understand what they're pointing at.

Builders in Unionville during that period were working fast. The subdivisions off Kennedy Road and around the Unionville GO station corridor were going up quickly to meet demand, and speed in construction almost always means shortcuts you only discover later. HVAC systems from that era are now 25 to 30 years old, which puts them right at or past the end of their useful life. Roof shingles installed in the mid-1990s on homes that haven't been updated are overdue. Poly-B plumbing, which was extremely common in Ontario builds from roughly 1978 through the mid-1990s, shows up regularly in homes from this period. That plastic piping degrades from the inside out, and the first time most homeowners find out they have a problem is when a fitting fails somewhere behind a finished wall.

Replacing Poly-B throughout a home of the size you're looking at in Unionville, typically in the 2,000 to 3,000 square foot range at the $1.3 million price point, runs between $15,000 and $22,000 depending on access and the layout of the plumbing. That's not a number you want to absorb as a surprise two years into ownership.

The older pockets of Unionville, the properties closer to the heritage core and along Unionville's original residential streets, carry a different set of concerns. Knob-and-tube wiring, lead service pipes, and rubble or stone foundations show up in that pre-war and early postwar housing stock. In homes of that era I commonly find the electrical has been partially updated around a kitchen renovation or an addition, but the original wiring still exists in the attic or in wall cavities that nobody touched. Partial updates can be more dangerous than none at all, because they create a false sense of security while the old work carries on doing what old work does.

July 2026 is also when you need to think about what sellers know and what they're choosing not to disclose. I'm not suggesting bad faith, but sellers often genuinely don't know what's in their walls or under their floors. A family that's lived in a house for 12 years might have no idea the attic insulation is sitting below code minimum, or that the bathroom exhaust fan has been venting into the attic space instead of outside the entire time. That kind of chronic moisture infiltration into the roof structure is quiet, slow, and it doesn't show any obvious signs until there's enough rot to start affecting the sheathing. In July, when everything is warm and dry, it can be completely invisible to the eye.

The 62-day average days on market figure is actually useful information for you as a buyer. It means you likely have time to make a proper offer with conditions attached. The pressure to waive your inspection on a home priced near $1.35 million is real but it's not always justified by actual market conditions. A seller sitting on a listing for two months is not in a position to flatly refuse a reasonable inspection condition, and if they do, that tells you something worth knowing.

What I'd encourage you to do right now, before you fall in love with a specific property, is get a pre-listing inspection or at minimum go into your offer with an inspection condition and the name of an RHI already in your phone. Don't wait until you're in negotiations to figure out the logistics. Know who your inspector is, know their availability, and know that a proper inspection of a Unionville home in this size and age range takes three to four hours minimum, not the 90-minute walk-through some buyers settle for under time pressure.

This market in July 2026 is not impossible to navigate. There are good homes here. Unionville is genuinely one of the most desirable communities in the GTA and the reasons for that aren't going anywhere. You just need the information before you commit, not after.

Reach out directly if you want to talk through what to look for in a specific property or what questions to ask before you book anything.