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Understanding the impact of transformations on the value of your property

25 March 2025 Last update 25/03/2025

Are you a homeowner? In this article, find out how certain transformations can affect the value of your property and what this means for your taxes!

What kinds of transformations influence the value of a property?

It’s not always easy to know which renovations or modifications will affect the value of your home. Some significantly increase property assessments, while others have a more limited impact. Let’s explore the main transformations to consider!

Major renovations

Major renovations include work that significantly alters the size or configuration of the house. It could be an extension, adding a storey, building a garage or installing a swimming pool. These transformations generally increase property value significantly, as they add living space or amenities valued by buyers.

Structural improvements

Structural improvements involve renovations that improve a property’s durability and functionality. This includes replacing the roof, windows and doors, modernizing the heating system, and completely renovating the kitchen or bathroom.

Additional installations

The addition of outdoor or ancillary facilities can also influence property value. For example, building a solarium, garden shed or permanent terrace adds value to the property, while improving comfort and living space. However, the impact on property assessment varies according to the scope of the work and the way it is integrated into the home.

Change of use

Changing a building’s vocation can have a considerable impact on its value. Changing from a single-family residence to a rental building, adding an accessory dwelling unit (such as a finished basement or intergenerational unit) or transforming part of the house into commercial space are all examples of changes of use. These changes may result in a significant increase in municipal taxes due to the new property assessment and the adjustment of the applicable tax rate.

How are these transformations taken into account in the property valuation?

When you carry out work on your property, its impact on the property assessment depends on a number of factors. Here’s how these transformations are taken into account when calculating property value:

The role of municipal appraisers

Municipal assessors are responsible for determining property values based on specific criteria. They analyze the impact of the transformations carried out on the value of the property. When a major transformation is carried out, they can carry out an inspection to adjust the property assessment accordingly.

Frequency of property assessment updates

At Ville de Brossard, the property assessment roll is updated every three years. However, if the work is declared by a building permit (e.g., an extension or the addition of a dwelling), the assessment may be updated as soon as the work is completed, and this may result in an increase in municipal taxes the following year.

On the other hand, more minor improvements, such as roof replacements or interior renovations, can usually be incorporated into the next official property assessment update. In this case, the change in taxation will be deferred.

If you feel that the assessment of your property appears to be inaccurate or overestimated, you have the right to contest it. To do so, we recommend that you contact the Ville de Brossard appraisal department with supporting evidence (e.g., professional appraisals, recent sales comparables, photos, official documents, etc.).

How does property value affect municipal taxation?

Land value is the estimated market value of a property, as determined by the city. It serves as the basis for calculating municipal taxes, which are intended to finance certain essential services for residents. The higher the property value, the higher the municipal taxes.

However, the increase in municipal taxes also depends on the tax rate set by the city, which is not the same from one municipality to another and can vary from year to year. In fact, the city must ensure that taxes are distributed equitably among all property owners, based on the real value of their assets.

What should you do before undertaking major work?

Renovation projects are a source of satisfaction, but they also require a high level of preparation to avoid stress and unpleasant surprises. Here are a few tips to get you started with peace of mind:

  • Check municipal by-laws to avoid legal problems;
  • Get the necessary permits before you start;
  • Choose qualified professionals to ensure the quality of the work;
  • Anticipate the impact on your property assessment and municipal taxes;
  • Assess whether the investment is worthwhile in terms of long-term benefits (e.g. improved comfort, increased resale value, etc.).

In short, undertaking major work on your property can not only improve its comfort and functionality, but also influence its property value and, consequently, your municipal taxes. Careful preparation will help you maximize the benefits of your renovations while avoiding inconvenience!