Average plex price · Sainte-Thérèse · 2016-2026
The average sale price of a plex in Sainte-Thérèse every year since 2016, beside the median price and the median asking price, the gap between the average and the median and what it reveals about the market. Centris sales, nothing estimated.
In Sainte-Thérèse, the average sale price of a plex is $823,631 in 2026 (Jan. to Sept.), against $404,745 in 2016 (+103%) and $587,742 in 2021. The median price, meanwhile, is $815,000: the average is 1% above the median, a $8,631 gap, against 4% in 2016. The median asking price is $849,450: plexes sell 4% below asking in 2026, against 11% below in 2021. It is one of the narrowest gaps among the 23 cities tracked (median 13%): the plex stock is homogeneous. Source: Centris (Matrix), compiled October 10, 2026.
The short answer
In Sainte-Thérèse, the average sale price of a plex is $823,631 in 2026 (Jan. to Sept.), against $404,745 in 2016 (+103%) and $587,742 in 2021. The median price, meanwhile, is $815,000: the average is 1% above the median, a $8,631 gap, against 4% in 2016. The median asking price is $849,450: plexes sell 4% below asking in 2026, against 11% below in 2021. It is one of the narrowest gaps among the 23 cities tracked (median 13%): the plex stock is homogeneous.
Average price, median price and asking price by year
| Year | Average price | Median price | Average ÷ median | Median asking price | Sold ÷ asking | Sales |
|---|---|---|---|---|---|---|
| 2016 | $404,745 | $390,000 | 4% | $377,400 | 3% | 47 |
| 2017 | $396,666 | $395,500 | 0% | $389,900 | 1% | 44 |
| 2018 | $368,224 | $342,750 | 7% | $449,000 | -24% | 48 |
| 2019 | $455,486 | $463,000 | -2% | $454,900 | 2% | 45 |
| 2020 | $559,310 | $472,500 | 18% | $494,450 | -4% | 70 |
| 2021 | $587,742 | $560,000 | 5% | $627,450 | -11% | 127 |
| 2022 | $650,202 | $622,500 | 4% | $699,450 | -11% | 54 |
| 2023 | $661,989 | $667,000 | -1% | $749,000 | -11% | 45 |
| 2024 | $706,338 | $685,000 | 3% | $699,000 | -2% | 47 |
| 2025 | $776,628 | $767,500 | 1% | $819,500 | -6% | 70 |
| 2026 (Jan. to Sept.) | $823,631 | $815,000 | 1% | $849,450 | -4% | 55 |
Average sale price and median asking price, Income property category, Centris (Matrix), October 10, 2026 harvest; median sale price and sales, September 16 query. 2026: January to September.
What ten years of prices say in Sainte-Thérèse
- Ten years: average price +103%, median price +109%, median asking price +125% in Sainte-Thérèse. The median rose as much as or more than the average: the increase came from ordinary plexes. Since 2025: average +6%, median +6%.
- The average-to-median gap by period: 2016-2019 2%, 2020-2022 9%, 2023-2024 1%, 2025-2026 1%; widest in 2020 (18%), narrowest in 2019 (-2%). A widening gap says large buildings (six units and more, new triplexes) weigh more in sales.
- Sold versus asking: the sold median exceeded the asking median in 2016, 2017, 2019; in 2026, the gap is -4%. The average price fell in 2017, 2018; its peak is 2026 ($823,631).
- The average plex in Sainte-Thérèse is worth 1.27 times the median house ($650,000): the average plex exceeds the median house: normal, it holds two units or more.
- Across the 23 cities tracked, the average plex price went from $323,103 to $722,106 (+123%) in median of cities, the median price from $252,500 to $600,000 (+138%); the average-to-median gap is 13% in 2026 (19% in 2016), it widened in 9 cities, it exceeds 10% in 19; plexes sold above the median asking price in 1 cities in 2021 and in 1 in 2026.
What it changes for selling or buying a plex in Sainte-Thérèse
In Sainte-Thérèse, the average and the median say the same thing: $823,631 against $815,000, a 1% gap. The plex stock is homogeneous, similar duplexes and triplexes in similar neighbourhoods, and a seller can rely on either; what matters then are the rents in place, the building's condition and the number of units, which make the difference between two plexes at the same average price. For a buyer, it is a market where the price is predictable and the negotiation plays out over a few thousand dollars, not ten percent. The median price and its trajectory are in plex prices in Sainte-Thérèse; the same calculation for houses, in average house price in Sainte-Thérèse.
How to read these figures
The average rises as soon as a handful of very expensive plexes sell; the median does not. The gap between the two therefore measures the weight of the high end in sales, not the market's rise. The median asking price is that of the same sales at listing; sold-to-asking measures the average negotiation: above zero, buyers bid up, below, they negotiate.
Frequently asked questions
What is the average plex price in Sainte-Thérèse in 2026?
$823,631 on average in 2026 (January to September), against $815,000 in median and $849,450 median asking price. In 2016, the average price was $404,745.
Why is the average price higher than the median price?
Because the average counts expensive plexes at their price and the median only counts their number. In Sainte-Thérèse, the gap is 1% in 2026 ($8,631), against 4% in 2016; across the 23 cities tracked, it is 13% in median.
Which one should I use to price my plex?
The median, and above all the rents and recent sales of comparable plexes. The city average places the market, it does not set a price: an ordinary duplex listed at the average price waits for a buyer who wants a bigger building. The median asking price ($849,450) and the sold-to-asking ratio (-4%) say what sellers listed and what they got.
Sources: Centris (Matrix), Statistics module, October 10, 2026 query for the municipality of Sainte-Thérèse, Income property category, average sale price and median asking price by year; median sale price and number of sales, September 16, 2026 query; compiled by the Loaa & Manseur team, aggregates only, current year partial. The average plex prices in 23 cities hub compares the 23 cities.
Our proof, not our promises
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Also available in French: version française de ce guide.
Published September 7, 2026 by the Loaa & Manseur team, the number 1 team at RE/MAX Platine in 2024 and 2025, 6th RE/MAX team in Quebec, 15th in Canada and in the global top 50 according to the official RE/MAX ranking. Tell us about your project.