Sainte-Thérèse is a city in the Thérèse-De Blainville RCM. It had 26,533 residents at Statistics Canada’s 2021 census, according to Centris. What sets it apart from its neighbours is the weight of plexes: over four quarters, Centris counts 72 plex sales there, compared with 14 in Boisbriand.
Sainte-Thérèse by the numbers
| Sainte-Thérèse | Sales | Median price | Average days on market |
|---|---|---|---|
| Single-family, Q3 2026 | 35 (+16%) | $710,000 (+15%) | 28 |
| Single-family, 4 quarters ending September 2026 | 140 (-10%) | $615,400 (+5%) | 26 |
| Condominium, 4 quarters | 129 (-21%) | $366,250 (0%) | 33 |
| Plex, 4 quarters | 72 (+30%) | $800,612 (+14%) | 33 |
Source: Centris real estate statistics for Sainte-Thérèse, third quarter of 2026. Changes compare with the same period a year earlier. In the third quarter alone, condominiums (23 sales) and plexes (12 sales) have too few transactions for a published median.
Supply is rising: 89 active listings in the third quarter, 28% more than a year earlier. The APCIQ groups Sainte-Thérèse and Boisbriand in sector 27. In the third quarter of 2026, single-family homes there recorded 83 sales (+6%), a median price of $650,000 (+8%) and 34 days on market; condominiums, 41 sales (-31%) at $420,000 (+5%). Over 12 months, the APCIQ classifies the sector’s single-family market as a seller’s market up to $940,000 and balanced above that. Source: APCIQ residential barometer, Q3 2026, page 37.
Sainte-Thérèse’s figures are compared with those of Blainville, Boisbriand and the other cities of the RCM in the Sainte-Thérèse, Blainville and Boisbriand real estate market in Q3 2026.
A two-speed market
On one side, a market of single-family and semi-detached homes, driven by families looking for a balance between price and access to services.
On the other, a market of income properties, around Cégep Lionel-Groulx and the Saint-Jérôme line station. The city’s rental vacancy rate was 1.4% in October 2025, according to CMHC (grade a), below the Montreal CMA’s 2.9%.
These two markets do not respond to the same signals, and a seller does not have the same strategy depending on which side they are on.
Assessment roll and welcome tax
The assessment roll in force covers 2026-2027-2028 and reflects the market on July 1, 2024. According to the City, total property value rises from $4.46 billion to $5.5 billion (+24.1%), and the value of single-family homes and condos increases by 23% on average. With its 2026 budget, the City announced a 3.89% increase in the tax bill.
For transfer duties, the City applies a 3% rate in 2026 on the portion from $500,001. The market value used is the roll value multiplied by the comparative factor, 1.00 in 2026, and the tax base is the higher of that amount and the price. The simulation published by the City for a $586,790 property gives $8,215. The calculation and the 2027 thresholds are in the welcome tax guide.
Transit, schools and construction
Train. Sainte-Thérèse station, at 6, rue de la Gare, is on exo’s 12 Saint-Jérôme line, in fare zone C, with 573 parking spaces, a bike station and a Communauto station. Exo rebuilt the bus loop at the Sainte-Thérèse terminus from June 29 to August 28, 2026.
Schools. Sainte-Thérèse is served by the Centre de services scolaire des Mille-Îles. Its schools in the city include Arthur-Vaillancourt, Saint-Gabriel, du Trait-d’Union, Saint-Pierre, Terre-Soleil, de la Renaissance and the Polyvalente Sainte-Thérèse.
Construction. From January to September 2026, CMHC counted 30 housing starts in Sainte-Thérèse, compared with 77 in the same period of 2025.
What to check here
Current leases, for any income property. Below-market rents cannot be corrected freely, and the return calculation must account for that from the start.
The actual vacancy on the street, which the municipal average does not show.
System age in Vieux-Sainte-Thérèse: roof, electrical service, plumbing, French drain.
Selling and buying in Sainte-Thérèse
For a single-family seller, preparation and list price matter more than timing: in the third quarter of 2026, single-family homes sold in 28 days on average. For a plex seller, the numbers decide: a building with clear financial documents is easier to compare.
The comparative market analysis is prepared at no charge and gives an estimated market value. For a buyer or investor, the return analysis is done before the visit, not after: the income shown in a listing is not a return.
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