Property taxes · Châteauguay · 2026
How much are the taxes on a house in Châteauguay 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 Châteauguay, the city announces a 2026 tax bill of $4,149 for its reference property, up 3.4%. The residential general property tax rate is $0.5955 per $100 of assessment ($0.5893 in 2025). City figures, checked on October 19, 2026.
The short answer
In Châteauguay, the city announces a 2026 tax bill of $4,149 for its reference property, up 3.4%. The residential general property tax rate is $0.5955 per $100 of assessment ($0.5893 in 2025).
The 2026 tax bill in Châteauguay
$4,149: this is the 2026 tax bill published by the city. What the city means by it: Tax bill for the average house assessed at $495,043: $4,149 in 2026 compared with $4,014 in 2025 (+$135, +3.36%), without local improvement taxes or pool fees.
Increase announced by the city for 2026: +3.4%. Each city measures its increase its own way (with or without water, waste collection or special taxes): compare the bills, not just the percentages.
Average value of a home on the assessment roll, according to the city: $495,043. For reference, a house sold for $520,000 at the 2026 median on Centris (342 sales): the municipal assessment and the sale price are two different things.
The property tax rate in Châteauguay
| Rate per $100 of assessment | 2026 | 2025 | Rate change |
|---|---|---|---|
| General property tax, base residential rate | $0.5955 | $0.5893 | +1.1% |
Other rates: The published “taux de base (résiduel)” (base rate, residual) of $0.5955 includes two metropolitan components: municipal base rate $0.5507 ($0.5465 in 2025), ARTM $0.0365 and CMM $0.0083. Other 2026 categories: 6 dwellings or more $0.7938; serviced vacant land $2.3822; industrial $1.4154; non-residential $1.7220; agricultural operation $0.5955. Local improvement taxes may be added.
Fixed fees: 2026 fixed fees per door (2025): drinking water $387 ($366), wastewater treatment $426 ($402), household waste $155 ($152), recycling $0, organic waste $115 ($116), Régie Beau-Château $118 ($61, increase tied to the new indoor aquatic complex).
The assessment roll in Châteauguay
2025-2026-2027 three-year roll (2nd year in 2026).
Calculating the taxes on a house in Châteauguay
The general property tax is calculated as: municipal assessment × rate ÷ 100. Example: a house assessed at $500,000 would pay $2,978 in general property tax at the 2026 rate of $0.5955. 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 $495,043, the 2026-2027 school tax would be about $371.
Before buying in Châteauguay
- 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 Châteauguay:
- Welcome tax on the median house in Châteauguay
- Home prices in Châteauguay, ten years
- Buying an Airbnb in Châteauguay: the rules
Each page starts from actual Centris sales or official documents, aggregates only.
The municipal assessment in Châteauguay:
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 Châteauguay in 2026?
$4,149 in 2026 for the city's reference property, a 3.4% increase. The bill for a given house depends on its assessment and the fees in its sector.
What is the property tax rate in Châteauguay in 2026?
$0.5955 per $100 of assessment for the base residential general property tax in 2026, versus $0.5893 in 2025.
Are taxes going up in Châteauguay in 2026?
The increase announced by the city is +3.4% for 2026. It applies to the city's reference property; a house whose assessment rose more than average will see a bigger increase.
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:
- Cahier du budget 2026, Ville de Châteauguay (official source, in French, 2026-01-26)
- Communiqué COM01, budget 2026 (official source, in French, 2026-01-27)
- Rôle d'évaluation foncière, Ville de Châteauguay (official source, in French)
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.