Property taxes · Westmount · 2026
How much are the taxes on a house in Westmount in 2026? The average bill, increase and rate published by the city in its budget, what the assessment roll changes, and the 2026-2027 school tax. Official figures, sources cited.
In Westmount, the city announces a 2026 tax bill of $17,808 for its reference property. The residential general property tax rate is $0.6583 per $100 of assessment ($0.6548 in 2025). 2026 is the first year of a new assessment roll: values went up, the rate was adjusted, and it is the bill, not the rate, that tells you what you pay. City figures, checked on October 19, 2026.
The short answer
In Westmount, the city announces a 2026 tax bill of $17,808 for its reference property. The residential general property tax rate is $0.6583 per $100 of assessment ($0.6548 in 2025). 2026 is the first year of a new assessment roll: values went up, the rate was adjusted, and it is the bill, not the rate, that tells you what you pay.
The 2026 tax bill in Westmount
$17,808: this is the 2026 tax bill published by the city. What the city means by it: 2026 tax bill for an average single-family home assessed at $2,705,159 on the new roll, Infrastructure special tax included.
Average value of a home on the assessment roll, according to the city: $2,705,159. For reference, a house sold for $2,272,500 at the 2026 median on Centris (137 sales): the municipal assessment and the sale price are two different things.
The property tax rate in Westmount
| Rate per $100 of assessment | 2026 | 2025 | Rate change |
|---|---|---|---|
| General property tax, base residential rate | $0.6583 | $0.6548 | +0.5% |
Other rates: The total residential rate of $0.6583 per $100 (residential buildings with 5 dwellings or fewer and with 6 or more dwellings) combines the general property tax of $0.6422 and a new Infrastructure special tax of $0.0161. It includes agglomeration services: the City issues a single tax notice for local and agglomeration services.
The assessment roll in Westmount
New triennial roll of the Montréal agglomeration (2026-2027-2028), in force on January 1, 2026; 5.6% increase in the total value of properties in Westmount.
Calculating the taxes on a house in Westmount
The general property tax is calculated as: municipal assessment × rate ÷ 100. Example: a house assessed at $500,000 would pay $3,292 in general property tax at the 2026 rate of $0.6583. This is a sample calculation, not the actual bill: add the fees (water, waste collection), special taxes and, where applicable, sector taxes. The actual bill for an address is on the city's online assessment roll and on the seller's latest tax bill: ask for it before making an offer.
The 2026-2027 school tax
The school tax is not set by the city. Since 2020-2021, the rate is the same everywhere in Quebec: $0.07899 per $100 of standardized assessment for 2026-2027 ($0.08423 in 2025-2026), and the first $25,000 of value is exempt. It is calculated on the standardized value, which can differ from the roll value. Example: for a standardized value of $2,705,159, the 2026-2027 school tax would be about $2,117.
Before buying in Westmount
- Ask for the seller's latest tax bill and the roll assessment of the address: it is the only exact figure for your budget.
- Check the roll year. After a new roll, the assessment can jump: next year's bill will not be this year's.
- Count the sector fees (water, sewers, garbage, local improvement taxes): two houses of the same value in the same city can pay different amounts.
- Include taxes in the mortgage calculation. The lender includes them in your debt ratios: the welcome tax is paid once, property taxes every year.
The other costs of a house in Westmount:
- Welcome tax on the median house in Westmount
- Home prices in Westmount, ten years
- Buying an Airbnb in Westmount: the rules
Each page starts from actual Centris sales or official documents, aggregates only.
The municipal assessment in Westmount:
The average roll value published by the city versus the median sale price of houses, and why they differ.
Coming from Montreal?
Prices, monthly mortgage payment and welcome tax compared with Montreal.
Frequently asked questions
How much are property taxes in Westmount in 2026?
$17,808 in 2026 for the city's reference property. The bill for a given house depends on its assessment and the fees in its sector.
What is the property tax rate in Westmount in 2026?
$0.6583 per $100 of assessment for the base residential general property tax in 2026, versus $0.6548 in 2025.
Are taxes going up in Westmount in 2026?
Yes in dollars for most owners, even if the rate drops: 2026 is the year of a new roll, assessments went up and the city adjusted its rate.
What is the 2026-2027 school tax rate?
$0.07899 per $100 of standardized assessment in 2026-2027, everywhere in Quebec, after an exemption on the first $25,000.
All cities side by side: 2026 property taxes in 72 cities.
Sources
City documents consulted on October 19, 2026:
- Lettre du maire accompagnant le compte de taxes 2026 (official source, in French, 2026-01-13)
- Taxes et évaluation municipale (official source, in French, 2026)
School tax (in French):
- CGTSIM, Comprendre la taxe scolaire (2026)
- CGTSIM, Comprendre la taxe scolaire (2026)
- CGTSIM, Comprendre la taxe scolaire (2026)
Prices: Centris (Matrix), median sale price of single-family homes, 2026 since January; compiled by the Loaa & Manseur team, aggregates only. Rates, bills and increases are those published by the city; sample calculations are illustrations. This page informs: it is neither tax advice nor an appraisal.
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.