If you own a place in Old South and you haven't checked your HonestDoor Price lately, now is the time. The story here is split right down the middle - and which side you're on depends entirely on what type of property you hold.
Let's be straight with each other. Houses and condos in Old South are not moving in the same direction right now, and that gap matters for your wallet.
Houses: The average HonestDoor Price for a house sits at $335,186, and it has dipped 6.70% from the previous period. That's the market taking a breather. The predicted value, however, is tracking at $359,265 - up from a 3-month moving average of $356,542. So while the recent dip is real, the forward-looking signal is still pointing upward. On the neighbourhood leaderboard, Old South houses rank 9 out of 19 comparable Sarnia neighbourhoods for growth. That's above average - not the top of the pack, but solidly in the better half.
Condos: This is where it gets interesting for us. Condo values are up 9.29% from the previous period, with an average HonestDoor Price of $359,575. The predicted value sits at $329,011, climbing from a 3-month moving average of $327,906. Recent price change? 13.82%. And on that same neighbourhood leaderboard, Old South condos rank 2 out of 19 in Sarnia. That is top-performer territory. If you own a condo here, you are sitting on one of the hottest small assets in the city right now.
Here is the thing about your municipal tax assessment - it is a snapshot from the past. The city looks at a fixed valuation date and that number gets frozen in time. Meanwhile, Old South condo values just moved 13.82% recently. Your assessment has no idea that happened.
The HonestDoor Price is updated in real time. It pulls from actual market activity right now - not from what a government office decided your home was worth a year or two ago. For house owners watching a 6.70% dip, that distinction matters. For condo owners riding a 9.29% gain, it matters even more. You need a number that reflects today, not yesterday. That is exactly what the HonestDoor Price gives you.
Compared to nearby neighbourhoods, Old South condos are priced higher than both Coronation Park and Cardiff Acres - and that premium is backed by real demand, not guesswork.
If you own a condo in Old South, the timing conversation is worth having right now. A 2nd-place growth ranking in Sarnia, a 9.29% price increase, and strong short-term rental demand - that combination does not sit around forever. Summer inventory tends to rise, which means more competition for your listing. Getting ahead of that wave makes sense.
If you own a house, do not panic over the 6.70% dip. The predicted value is still climbing and the rental yield of 5.90% tells you there is real demand for this neighbourhood. If selling is on your radar, price it sharp and price it based on your HonestDoor Price - not a stale assessment number that missed the recent movement entirely.
Either way, the smartest first move is simple - check your HonestDoor Price today, see where you actually stand, and make decisions based on what the market is doing right now.
old south | sarnia | july 2026This 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.