Thornhill South, Markham - September 2026 Real Estate Report

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

The Vibe Right Now

If you've been watching the "For Sale" signs on our streets, here's what's actually happening. Thornhill South is a tale of two markets - and depending on whether you own a house or a condo, your situation looks pretty different heading into summer.

Houses: The Most Expensive Address in Markham - But Buyers Are Taking Their Time

Let's start with the good news. We sit at the top of the Markham price leaderboard for houses - ranked 1 out of 9 neighbourhoods. The average sale price is sitting at $2,300,000, and the HonestDoor Price for houses is coming in at $2,193,998. That's serious money.

But here's the honest part. Only 1 house sold recently, and it sat on the market for 172 days before it did. That's nearly six months. Buyers are also negotiating hard - homes are selling at about 91 cents on the dollar compared to list price. The average listing is posted at $2,530,000, but the actual sale lands closer to $2,300,000. That gap matters if you're pricing your home this summer.

• Average HonestDoor Price (Houses): $2,193,998 - down 1.57% from last period
• Average Sale Price: $2,300,000
• Average List Price: $2,530,000
• Sale-to-List Ratio: 90.91% - buyers are paying below ask
• Average Days on Market: 172 days
• Price Per Square Foot: $541
• Estimated Monthly Rent: $7,331 - rental yield of 3.73%
• Airbnb Rank in Markham: 1 out of all neighbourhoods - top spot
• Growth Rank: 13 out of 14 neighbourhoods - near the bottom of the leaderboard
• Days-on-Market Rank: 7 out of 7 - slowest-selling in Markham

The neighbourhood leaderboard stat that should get your attention: growth ranks 13 out of 14 in Markham. We're the most expensive, but we're not growing the fastest. That's a classic "premium plateau" - the kind of market where pricing your home right from day one is everything.

Condos: A Steadier Story, But Watch the Trend

Our condo market is holding up better than the headlines might suggest. The HonestDoor Price for condos is $568,947 - up 0.81% from last period. That's a small but positive move. We're sitting in the middle of the pack compared to neighbours - cheaper than Concord-Vaughan ($698,004) and Thornhill North ($583,306), but more expensive than Newtonbrook East ($528,583).

The thing to watch: the predicted market value of $564,367 is actually trending down from the 3-month moving average of $573,069. And recent property value change is -2.94%. So while the HonestDoor Price is nudging up, the short-term momentum is pointing the other way. Not a crisis - but worth knowing before you decide to wait another six months.

• Average HonestDoor Price (Condos): $568,947 - up 0.81%
• Predicted Market Value: $564,367 - below the 3-month average of $573,069
• Recent Value Change: -2.94%
• Estimated Monthly Rent: $2,763 - rental yield of 3.72%
• Airbnb Estimate: $138 per night
• Growth Rank: 7 out of 14 - above average in Markham

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

Here's something most homeowners in Thornhill South don't think about until it's too late. Your city assessment is a snapshot from the past - sometimes years old. It has no idea what happened to interest rates, buyer demand, or how long homes are sitting on the market right now.

The HonestDoor Price is updated in real time. It's pulling in actual sales data, current listing activity, and neighbourhood trends as they happen. For a house owner here, there's already a gap between the HonestDoor Price ($2,193,998) and the average sale price ($2,300,000). That difference is useful information - it tells you the market is still transacting above the estimated value, even in a slow environment.

If you're making any decision about selling, refinancing, or even just understanding what you actually own - the HonestDoor Price is the number to check first. Not the assessment notice sitting in your kitchen drawer.

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

If you own a house in Thornhill South and you're thinking about listing this summer, here's the straight talk. You own one of the most expensive properties in Markham - that's real. But the market is taking a breather. Homes are sitting for an average of 172 days, and buyers are coming in below asking price. The growth rank of 13 out of 14 tells us this isn't a neighbourhood where you can overprice and wait it out.

The move this summer is to price sharp from day one. The data shows a gap between what sellers are asking ($2,530,000 average list) and what buyers are actually paying ($2,300,000 average sale). Close that gap upfront and you'll sell faster. Leave it wide open and you're looking at six months of carrying costs and price reductions.

If you own a condo, the picture is a bit more forgiving. Growth ranks above average at 7 out of 14, and the rental yield of 3.72% means holding the property still makes sense if you're not in a rush. But the 3-month trend is softening - so if selling is on your radar for 2025, sooner is probably smarter than later.

Either way, pull your HonestDoor Price before you call an agent. It's the real-world check that tells you where you actually stand - not where you stood two years ago.

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.