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Taxes and Property Assessment

Assessment Roll

The assessment roll is an inventory of all the buildings and land in the territory of a municipality. It contains a variety of information and states the real value of each property in the territory. It is therefore the assessment roll that provides the basis for calculating municipal and school taxes and distributes the tax burden among property owners.

The Act Respecting Municipal Taxation stipulates that new assessment rolls must be deposited every three years. This allows the taxation base to be kept current, based on conditions in the real estate market, which are changing constantly. This means that unless changes are made to the property, the real value on the roll will remain the same for its duration, that is, three years.

Please note that since the old assessment role was more than three years old, the most recent one, which was deposited in September 2019 and reflected property values on July 1, 2018, will, exceptionally, be in effect for just two years, that is, 2020 and 2021.

  • The city allows you to check the electronic version of the tax bill and assessment role for a property. ​

    Service to the public

    You can access the following information for free at all times:

    • Cadastre number
    • Owner’s address
    • Designation of the immovable
    • Area of the land
    • Municipal assessment of the immovable, building and land
    • Amount of annual taxes

    The request can be made by address, by identification number or cadastre number.

    Consult the assessment and taxation roll

    Service for professionals

    In addition to the public data, the city allows recognized professionals, such as real estate agents, notaries, mortgage lenders, assessors, etc., to obtain additional information about a building, such as taxes owing, in exchange for a fee based on their status.

    For professionnals – Consult the real estate portal  

  • The assessor bases the assessment on the actual exchange value of a property on an open and competitive market at a predetermined reference date. This value represents the most likely price that would have been paid for the property in a normal sale by agreement.

    The assessor also uses other assessment methods: comparison (based on the sale price of similar buildings), cost (based on the value of the buildings, improvements and the land) and income (based on the building’s estimated present and future income-producing capacity, for a rental property).

  • When a new assessment role is deposited or a change is made to it, anyone with an interest (owner, tenant, taxpayer, etc.) in a property can submit an application for an administrative review of the value or any other data entered in the roll for your property.

    Since non-refundable fees are charged for the review, you must have serious reasons to believe that the value of our property, or any other information about it, is inaccurate.

    To apply for an administrative review, you must complete the Application for a review of the assessment roll (in French only), attach the sum shown in your notice of assessment or modification and either send it by registered mail or take it in person to the Service des finances at the following address:

    Édifice de la Mairie
    5, boul. D’Youville
    Châteauguay (Québec)   J6J 2P8

    The application must be filed before May 1 following the effective date of the assessment roll. For the 2020–2021 roll, the deadline was April 30, 2020.

  • The assessment roll states the actual value of each property. This assessment is established by the city assessor or their representative.

    Under the Act Respecting Municipal Taxation, the assessor has the authority to visit your property. During the visit, the assessor will verify certain items, such as:

    • Landscaping
    • Surface area of the building
    • Level of maintenance
    • Renovations
    • Location of the property
    • Income generated, if any

    An inspector may visit your property if you have just acquired it, if you have done renovations, added an extension or even if no changes have been made. The Act Respecting Municipal Taxation allows for an inspection of properties every nine years.

    The information collected is added to the file for your property, which is a fundamental part of creating and maintaining the assessment roll.

    Free access to your property is important: the municipal assessor’s representative must be able to visit it, examine it and ask you questions to complete your file. When the assessor’s representative arrives, they will show you ID.

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