Challenging Your Quebec Condo Property Assessment: A Guide

Information current as of 2026-06-08.

Are you wondering whether it is worthwhile to challenge your Quebec condo property assessment? An excessively high municipal assessment increases your taxes, puts pressure on your budget and, indirectly, affects your ability to keep up with your common expenses and condo fees. In a divided co-ownership, this issue concerns both each co-owner and the board of directors, which monitors the risk of arrears.

This guide explains, in plain language, when and how to request a review, what evidence to gather and the possible impacts for you and the syndicate. We also cover best practices to record in the annual general meeting minutes, so that the board of directors maintains a consistent overall view aligned with the declaration of co-ownership, the maintenance logbook (EUC) and the contingency fund’s financial objectives.

Why challenge your condo’s assessment?

A challenge is not a gamble: it is based on objective factors. The most common situations include:

• Factual errors in the assessment roll: private area, number of rooms, parking space, storage area, level of finishing, view or nuisances (noise, proximity to a major road).
• Poorly selected comparables: sales included that do not represent your unit or the building.
• Changes not reflected: major work that temporarily limits use, a recent loss, or particular restrictions in the building.
• Features of the common portions: no elevator, a closed pool or common equipment nearing the end of its service life, all of which affect perceived market value.

A successful reduction can lower your municipal taxes. It does not directly affect your common expenses, but it eases the pressure on your personal cash flow, reducing the risk of unpaid amounts to the benefit of the syndicate.

Assessment roll: what it changes for your budget

The municipal assessment roll is used to allocate the tax base. It is generally triennial and based on market value. Each co-ownership fraction is assigned a value, often correlated with the co-ownership share, but not identical to it.

Practical consequences:

• Your municipal and school taxes result from this value multiplied by the applicable rates.
• The syndicate may occasionally receive tax bills for certain common portions with a separate lot. The board of directors must budget for them correctly.
• Indirectly, an overassessed roll weakens some co-owners’ ability to pay, complicating the management of assessments, the monitoring of financial statements and contingency fund planning.

For a reminder of good budgeting practices in co-ownership, consult the RGCQ. If you would like to delegate the monitoring of collections and the budget, see our financial management service and our packages.

Deadlines and official steps in Quebec

In Quebec, the Municipal Taxation Act governs challenges. In short, you must first file a “request for review” with the municipal assessor and, if necessary, bring the matter before the Administrative Tribunal of Québec (TAQ). Refer to the legislation for the exact conditions and applicable fees: LégisQuébec – Municipal Taxation Act.

Typical steps:

1. Find the deadline shown on the notice (new roll or amendment). If no deadline is indicated, note that, for a new roll, the request must generally be received no later than May 1 of the first year of application. In the case of an amendment notice, a deadline of approximately 60 days applies.
2. File the request for review with your municipality’s or regional county municipality’s assessment department, giving specific reasons and supporting documents. Administrative fees may be required.
3. Discuss the matter with the assessor: they may confirm, adjust or reject the assessment. An agreement may be reached.
4. If you are not satisfied, bring the matter before the TAQ within the prescribed deadlines, attaching the decision received and your evidence. Additional fees and a hearing should be expected.
5. Implement the decision: reduction, confirmation or, rarely, an increase. The taxes are then adjusted for the period concerned; a credit or refund may be issued under local rules.

Documents to attach to support your case

• Copy of the assessment roll and the notice received.
• Deed of sale, plans of the unit and certificate of location, if necessary.
• Dated photos showing the actual condition (finishes, views, nuisances, loss).
• Breakdown of areas (private portions and exclusions) to avoid confusion with the common portions.
• Recent sales comparables for similar units in the building or neighbourhood; your broker can help, so see the OACIQ.
• If necessary, a report from a chartered appraiser.

Board tip: record in the minutes the decision to authorize or not authorize a challenge on behalf of the syndicate for any taxable common portion, and keep the evidence in the administrative file.

Building strong evidence and quantifying the issue

Your goal is to show that the value entered on the roll significantly exceeds the market value.

Here is a simple approach:

• Define the unit’s key attributes: floor, orientation, parking, noise, renovations, finishes and access to the common portions (elevator, gym, pool).
• Select 3 to 5 comparables that are very close in time and location. Exclude atypical sales (liquidations, sales between family members).
• Quantify the differences: area, whether parking is included and the condition of the premises. A clear adjustment grid reassures the assessor.
• Document unfavourable factors: corrective work planned in the maintenance logbook (EUC), temporary closures of common equipment and limitations on use.
• Estimate the budgetary impact: calculate the potential savings by multiplying the targeted reduction by the overall tax rate. Compare this with the fees and time required.

For co-owner landlords, municipal taxes are an expense related to rental income; learn about permitted deductions from Revenu Québec – Rental income.

Effects of a decision and board best practices

• If the value is reduced: wait for a revised bill or credit. Adjust your pre-authorized payments if necessary.
• If the value is maintained: reassess your evidence. It may sometimes be more rational to wait for the next roll.
• For the syndicate: when common lots are taxed, the board of directors must incorporate any adjustment into the budget and inform the co-owners. Mention it at the annual general meeting and in the minutes.
• No direct impact on condo fees: your common expenses, contingency fund and the orientations of the declaration of co-ownership do not change. However, more accurate taxes encourage regular payments.
• Documentary compliance: archive requests, acknowledgements of receipt, decisions and correspondence in the administrative file (financial management and administrative management).

To structure this follow-up, see our Services pages and the articles on our blog about condo governance.

FAQ – Challenging a condo assessment

• Can the board of directors challenge the assessment on behalf of the syndicate? Yes, if a common portion with a separate lot is taxed. A board resolution authorizing the process and filing the request must be recorded in the minutes.
• Does a successful challenge change my condo fees? No. Condo fees are determined by the syndicate’s budget (common expenses and contingency fund plan). The challenge affects only your municipal and school taxes.
• Do I need to hire a chartered appraiser? It is not mandatory, but it is often worthwhile for significant discrepancies or complex situations. Weigh the cost against the expected benefit; in the event of a TAQ hearing, a professional opinion strengthens your case.

For a legal framework, consult the Municipal Taxation Act again. For co-ownership governance guidance, also see the RGCQ.

This article provides general information and does not constitute legal advice. Consult a lawyer or notary for your situation.

This article provides general information and does not replace the advice of a tax specialist or accountant. Refer to Revenu Québec and the CRA for exact details.

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