In Châteauguay and Mercier : average home values jump by more than 50%

According to the new 2025-2026-2027 property assessment roll, the average value of a single-family home has risen by 52% in Mercier and 51% in Châteauguay.

Translation Amanda Bennett

Thus, the average single-family home in Châteauguay increases in value from $328,000 to $495,000, while the average single-family home in Mercier rises from $346,852 to $527,184.

The assessment roll is the inventory of all real estate in a municipality, and serves as the basis for calculating municipal and school taxes. An independent firm is mandated to establish property values.

Châteauguay Mayor Eric Allard told the September municipal council that he was “shocked” when he saw the new data on building values in the municipality.

The average value of buildings of all types in Châteauguay has risen by 46%. The figure for Mercier is 47.7%.

Both the Mayor of Châteauguay and the Mayoress of Mercier, Lise Michaud, reiterated that an increase in property values will not translate into a significant rise in tax bills.

“It's a myth to believe that cities are getting richer with this assessment method, because the tax rate is adjusted to take into account changes in property values. As a result, the city's budget does not increase as a result of changes to the assessment roll,” explained Ms. Michaud. She cites as an example the year 2022, when the average value of a single-family home jumped 22%.

“In the 2022 budget, the tax rate was reduced from 72.53¢ to 60.72¢ per $100 of assessment, resulting in an average increase of 2.36% in the municipal tax bill,” she added.

Mr. Allard pointed out that “this is good news for those who have invested [in property], but not so good news for those who want to become homeowners”.