Municipal Taxes and Valuation

Westmount property owners can receive and consult their tax account online at any time on Voilà!.

Voilà! is an online portal that consolidates information on a property’s taxation data, assessment notice, and tax details. This information is available to the owner online at any time.

Access Voilà! Online Property Portal

Watch the following video to learn how to view your tax account on Voilà!:

Property owners must respect payment deadlines to avoid interest and penalties on outstanding property taxes or duties on transfer. The following payment methods are recommended to ensure payment prior to the deadline:

• Electronic payment:
  • Make a payment through your bank online or in person at your local branch.
  • Enter the 18 digits of the matricule number (numéro du matricule) found on the payment coupon and on the upper right-hand corner of your property tax bill, without hyphens.
• Payment by mail:
  • Make out your cheque to the order of the City of Westmount (no cash).
  • Use the coupon and return envelope, or mail your enveloppe to:
    City of Westmount (Tax)
    C.P. 334, SUCC Westmount, QC, H3Z 2T5
• Payment at City Hall:
  • During business hours: Payment by cheque or debit card (credit cards are not accepted) at the reception desk at the west entrance of the building.
  • When the building is closed: Deliver an envelope containing your cheque (no cash) in the mailbox on the door at the west entrance of the building.
• Payment by credit card or bank transfer:
  • Pay via the ACCEO Transphere online platform (ACCEO charges a fee of 1,98%).

Pay by credit card or bank transfer – Acceo Transphere

For technical support on the platform, please contact ACCEO Transphere at 1 844 748-7695.

The application of Bill 22 in 2009 has resulted in a revised tax structure, meaning that you will receive ONE PROPERTY TAX BILL, sent from the City of Westmount, for local services as well as for agglomeration services provided across the island. The rates vary according to property type.

Pay in Two Instalments

The City of Westmount is offering taxpayers the opportunity to pay their 2025 property tax bills over two equal instalments. The instalment deadlines are as follows:

Where an instalment is not paid within the prescribed time, only the amount of the unpaid instalment becomes due.

You can consult the 2023-2024-2025 City of Westmount Valuation Roll using the Immonet service.

Public (free of charge)Professionals

The designation of the building, the cadastral number and the assessed value of the property, as well as the property dimensions, are available through this service. Please note that personal information regarding the identity of the owner is not published. The global amount for annual property taxes is also available to both professionals and the general public. 

More about the valuation roll

This grant aims to offset a municipal tax increase brought about by a significant increase in the value of your residence.

Consult the Revenu Québec website

A transfer of immovables is a transfer of the right of ownership on a property as a result of a contract of sale, rental of more than 40 years, transfer of the rights of the emphyteutic lease or donation. 

Duties on transfers of immovables – also known as the ‘Welcome Tax’ – are charges that are payable when the right of ownership on a property is transferred. The buyer is responsible for paying these duties. Where there is more than one buyer, they are joint and severally liable for payment of the transfer duties. 

Every municipality must collect duties on the transfer of any immovable situated within its territory. (Act respecting duties on transfers of immovables – R.S.Q., chapter D-15.1). 

The duties on transfers of immovables are imposed at the time of purchase of an immovable and are payable in one instalment.

Comparison Factor

The comparison factor for 2025 is 1.08. Where the imposition is made on the basis of the market value at the time of the transfer, the value on the roll must be multiplied by the comparative factor of the fiscal year that corresponds to the registration date.

Consult the Répertoire des proportions médianes et des facteurs comparatifs*

* Prepared by the Ministère des Affaires municipales et Régions (available in French only)

If the transfer of your immoveable is not registered with the Land Registry, you're required to complete and submit Form A.

When a transfer duty exemption condition ceases to be met., you're required to complete and submit Form B.

The Mayor of the City of Westmount sends out an explanatory letter with the municipal tax bill.

Click below to view or download a copy of the annual letter.