Thornhill South, Markham - July 2026 Real Estate Report

Thornhill South, Markham: Your Neighbour Probably Doesn't Know This Yet

If you own a home in Thornhill South and you haven't checked your HonestDoor Price lately, now is the time. The market here is sending mixed signals - and the gap between what the city thinks your home is worth and what it could actually sell for is wider than most people realize.

The Vibe: What's Happening Right Now

Houses - High Price, Slow Pace

Let's be straight with each other. Our houses are among the most expensive in Markham - sitting at a price rank of 2 out of 8 comparable neighbourhoods. That's a real flex. But the other numbers deserve an honest look too.

• Average HonestDoor Price: $2,205,169 - up 0.94% from last period
• Average sale price: $2,300,000
• Average list price this month: $2,530,000
• Price per square foot: $541
• Homes are selling at 90.91% of list price - buyers are negotiating, and winning
• Average days on market: 172 days
• Predicted market value: $2,184,602
• Estimated monthly rent: $7,211 with a rental yield of 3.77%
• Airbnb potential: $358 per month

172 days on market is a long time. That's nearly six months of carrying costs, mortgage payments, and weekend showings. Our days-on-market rank is 7 out of 7 in Markham - dead last. That tells us buyers at this price point are taking their time, and sellers need to price sharp from day one. The growth rank of 12 out of 14 puts us near the bottom of the neighbourhood leaderboard in Markham right now. The market isn't crashing - it's just taking a breather - but that's worth knowing before you set your expectations.

Condos - A Different Story

Condos here are in a softer spot. The numbers are honest about it.

• Average HonestDoor Price: $581,455 - up 1.41% from last period
• Predicted market value: $573,386
• 3-month moving average: $587,111 - values are drifting down
• Recent value change: -4.42%
• Estimated monthly rent: $2,793 with a rental yield of 3.71%
• Airbnb potential: $139 per month
• Growth rank: 10 out of 14 in Markham

That -4.42% recent change is the number to watch. It means condo values in Thornhill South have slipped over the short term. We sit below Thornhill North ($596,472 predicted) and above Newtonbrook East ($544,107). Not the top of the leaderboard, not the bottom - but the downward trend in the 3-month moving average is a signal worth paying attention to if you're thinking about selling.

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

Here's the thing about your city assessment - it's a snapshot from the past. It doesn't know what happened on your street last month. It doesn't adjust when buyer demand shifts or when interest rates move. It's a static number doing a real-time job, and it's not built for that.

The HonestDoor Price is updated continuously using real transaction data and market signals. For houses in Thornhill South, that means a current read of $2,205,169 - a live number, not a government estimate that could be a year or more out of date. For condo owners, it's $581,455 right now, reflecting the actual direction values are moving.

If you're making any financial decision - refinancing, selling, buying out a co-owner, or just benchmarking your net worth - the HonestDoor Price is the real-world check you need. Your tax assessment is not that.

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

If you own a house in Thornhill South and you're considering listing this summer, here is the honest take.

You have a premium asset in a premium neighbourhood. Buyers know it. But they also know homes here are sitting for an average of 172 days, and they know they can negotiate. The average sale is closing at about 91 cents on the dollar. That means a home listed at $2,530,000 is realistically selling closer to $2,300,000. Price it right from day one - not from wishful thinking - and you cut that 172-day clock down significantly.

For condo owners, the short-term value dip of -4.42% is a reason to move sooner rather than later if selling is on your radar. Waiting for a rebound that hasn't shown up in the data yet is a gamble. The rental yield of 3.71% is moderate - holding as a rental is an option, but it's not a home run either.

One bright spot worth mentioning - Thornhill South holds the number 1 Airbnb rank in all of Markham for houses. If you have a property that could work as a short-term rental, this neighbourhood outperforms every other area in the city on that front.

Bottom line - check your HonestDoor Price today at HonestDoor.com. Know your real number before you make any move.

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.