For municipalities and assessment services

MonRôle shows every owner in Quebec what the public roll says about their property and how it compares with similar properties in the neighbourhood unit the assessor drew. This page is for the people who make and adopt those rolls.

Built and signed by Max Baker, a student in Montréal — not an assessor, not a firm. The study described here is statistical; it is not an appraisal and gives no opinion of value.

What the site shows your residents

For a property: its recorded facts, its tax at the municipality's rate, where its value sits among what its neighbours' rates would imply for a house of its size, how its value moved since 2022 against the same neighbours, and its land rate against theirs. The words are "above" and "below", never "wrong". A property below its peers is told so and offered nothing. The method is published in full on the method page, so an assessor can rerun it.

What an equity study measures

The same statistics, computed for a whole roll and delivered to the council or the assessment service before the review window opens, on the roll's own neighbourhood units:

• how consistently similar properties are treated inside each unit, and which units sit outside the municipality's own norm;
• how the revaluation moved values by value band, and which sectors now carry more of the bill under a revenue-neutral rate;
• whether properties sold near the market date were revalued differently from comparable unsold ones;
• land-rate uniformity inside each unit;
• the file's data quality: estimated years built, values without areas, missing characteristics, duplicates, listed by matricule;
• the exempt value by law and article;
• how many properties would fail two or more of the public site's checks, where, and the value at stake, which is the review workload to expect.

The report comes with its methods, so the assessor can reproduce every figure, and with benchmarks against municipalities of similar size.

What it cannot measure

It compares assessments with assessments. It holds no sale prices, so it does not say whether a roll is at market; the ministry's median proportion does that. It does not see quality, condition or renovations, which the assessor may have graded. A unit of mixed housing reads less consistent than a uniform one for that reason alone, and the report marks where that applies. It never says an assessment is wrong.

The two sides of the desk

The site helps owners ask for a review. The study helps a municipality check its roll before owners do. Both rest on the same published statistics, and a roll corrected before April means fewer requests in April. Four rules keep the two apart: no owner's data crosses to the municipal side; no municipality's audit changes what any owner's page shows; the methods are public so either side can check them; and every report states on its first page what it measures and what it cannot.

Contact

Assessment services, directors general and councils: contact@monrole.ca. A sample report on one of your own rolls, before any engagement, is the usual first step.