Thornhill South, Markham - August 2026 Real Estate Report

Thornhill South, Markham: Your Neighbour Just Asked "Should I Sell This Summer?" - Here's the Real Answer

The Vibe Right Now

If you own a house in Thornhill South, you are sitting on some of the most expensive real estate in Markham. Full stop. The average HonestDoor Price for houses here is $2,229,075 - up 1.08% from last period. That is not a headline number. That is your net worth ticking upward while you sleep.

But let us be straight with you. The house market is taking a breather. One property sold last month at an average of $2,300,000, and it sold for about 91 cents on every listed dollar. Homes are sitting for an average of 172 days. That is a buyers' market signal, and ignoring it would be doing you a disservice.

On the condo side, the story is a little different. The average HonestDoor Price for condos here is $564,367, and it has dipped 2.94% from the previous period. The predicted market value sits at $581,455, which is actually running slightly above the 3-month moving average of $584,924 - and that average is trending down. Condo owners, pay attention to that.

• House HonestDoor Price: $2,229,075 (up 1.08%)
• House average sale price: $2,300,000
• Houses selling at: 90.91% of list price
• Average days on market for houses: 172 days
• House price rank in Markham: 1 out of 8 - the most expensive
• House growth rank in Markham: 3 out of 14 - above average
• Condo HonestDoor Price: $564,367 (down 2.94%)
• Condo predicted market value: $581,455
• Condo growth rank in Markham: 6 out of 14 - above average

The Neighbourhood Leaderboard

Here is where Thornhill South stands against the neighbours. For houses, we rank 3rd out of 14 Markham neighbourhoods for growth. That puts us in the top tier. For price, we are number 1 out of 8 - nobody nearby is more expensive. Newtonbrook East houses average $2,176,280, Concord-Vaughan sits at $1,761,473, and Thornhill North comes in at $1,587,066. We are not just ahead - we are in a different weight class.

For condos, we rank 6th out of 14 for growth - solidly above average. Concord-Vaughan condos ($701,678) and Thornhill North ($594,953) are priced higher than us, while Newtonbrook East ($506,260) is cheaper. We are right in the middle of the pack on condo pricing, which actually gives buyers a reason to look here.

The Secret Sauce - Why Your HonestDoor Price Matters More Than Your Tax Assessment Right Now

Here is the thing about your city assessment. It is a snapshot from the past. The market has moved since then - sometimes a lot. The HonestDoor Price is updated in real time using actual sales data, listing activity, and neighbourhood trends. It is the number a serious buyer or their agent is going to use when they decide what to offer you.

For house owners, the HonestDoor Price of $2,229,075 is running close to the predicted market value of $2,205,169. That alignment tells us the data is solid and the market is not wildly mispriced. For condo owners, the HonestDoor Price of $564,367 versus a predicted value of $581,455 is worth watching - especially with that 3-month moving average trending downward.

If your tax assessment is sitting in a drawer somewhere, pull it out and compare it to your HonestDoor Price today. The gap between those two numbers is the gap between what the government thinks your home is worth and what the market actually says. That gap is your real-world check.

The "So What?" - Thinking About Selling This Summer?

If you own a house here and you are thinking about listing this summer, the honest advice is this: price it right from day one. Homes in Thornhill South are averaging 172 days on market - that is the slowest days-on-market rank in Markham, 7 out of 7. Buyers are not rushing. They are watching. A house priced at $2,530,000 (the current average list price) is selling for closer to $2,300,000. That gap is real, and it matters when you are planning your next move.

The rental picture gives sellers an alternative worth knowing. Houses here can pull an estimated $7,331 per month in rent. If the sale timeline feels too slow for your plans, that income number is not nothing.

For condo owners, the 2.94% dip in HonestDoor Price is a nudge, not a panic button. A rental yield of 3.69% and an estimated $2,763 per month in rent means holding still is a reasonable play while the market finds its footing. But if you were already thinking about selling, sooner is probably better than later while values are still above the 3-month trend line.

Bottom line - Thornhill South is still one of Markham's most valuable addresses. The house market is slow but not broken. The condo market is softening but still generating real income. Know your HonestDoor Price, price with intention, and do not let a stale government assessment be the number you negotiate from.

This information is all based on our opinions based on the information available to us. Everyone's situation may be different and you should reach out to us for more personalized information.