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Assessed value is not market value

This is the single most common misunderstanding about the numbers on this site, so it is worth being precise about it.

Every figure MonRôle shows comes from Quebec's rôle d'évaluation foncière — the municipal assessment roll. That is a tax figure. It is not an estimate of what a property would sell for today, and it is not intended to be.

Why the two differ

So if you look up a property you know well and think "that number is too low", the number is probably correct — it is simply measuring something other than the sale price. We have checked the values themselves against the government's own published files for 636,936 properties and they matched exactly, to the dollar, in 100% of cases.

What the assessed value is good for

What this site can and can't tell you

QuestionCan MonRôle answer it?
What is this property assessed at? Yes — for all 3.75M properties in Quebec
How has its assessment changed since 2022? Yes, per individual unit
Is its assessment in line with similar properties? Yes, where enough comparable data exists
Is the land agriculturally protected? Yes — province-wide
What zone is it in? Only in the 12 municipalities that publish zoning
What may I build here? We link to the official grid; we do not interpret it
What did it sell for? No — sale prices are not in this data
What is it worth today? No — see above
Where exactly is the property line? No — the cadastre is a graphic plan, not a survey

Known limitations, stated plainly

Where zoning data comes from

Municipal zoning is shown for 12 of Quebec's 1,101 municipalities — about 700,700 of 3,747,000 properties. Quebec has no provincial zoning registry; each municipality writes and publishes its own bylaw, and only these twelve publish a machine-readable zone map:

Everywhere else, the property panel says zoning is unavailable rather than implying there are no restrictions. The agricultural-zone layer (CPTAQ) is province-wide and independent of this list.

Sources & attribution

MonRôle is built entirely from public and open data. Nothing here is scraped from a competitor, and no owner names or personal information are stored — the assessment roll contains owner details and we deliberately do not ingest them.

Assessment values and history

Rôle d'évaluation foncière du Québec — Ministère des Affaires municipales et de l'Habitation (MAMH), via Données Québec. Rolls 2022 through 2026. Dataset ↗

Taxation rates

Rapport financier des organismes municipaux — MAMH, via Données Québec. The taux global de taxation réel, per organism. Dataset ↗

Agricultural zone

Zone agricole transposée au Cadastre du Québec — Commission de protection du territoire agricole du Québec (CPTAQ). Effective 2026-05-01. Dataset ↗
© Gouvernement du Québec

Property lines (cadastre)

Lots du cadastre rénové du Québec — Ministère des Ressources naturelles et des Forêts (MRNF), served live from the Government of Quebec's mapping service. This is the graphic cadastral plan and has no legal value as a boundary.
© Gouvernement du Québec

Municipal zoning

Published by each municipality as open data, via Données Québec or the city's own portal:

Each property's zoning panel links to the specific dataset it came from and, where the city publishes one, to that zone's specification grid.

Imagery and base map

Terms of use

The full terms of service and the privacy policy are separate pages. This is the short version.

MonRôle is an information tool, not an authority. The municipality, the assessment roll, the zoning bylaw and a licensed surveyor are authoritative; this site is not.

Questions, corrections, or a source we've credited incorrectly — we want to know. Accuracy complaints are treated as bug reports.

What the $49 includes

The free panel tells you whether a property is assessed above the comparable properties near it, and how many of them there are. It stops there deliberately; the rest is the paid part.

One payment of $49, for one property, produces a printable dossier containing:

The dossier is emailed to the address that paid, and it is built to be printed, signed and mailed with the form. A section with no data behind it is left out rather than filled in with guesses, so a property whose history the rolls do not carry gets a dossier without that table.

A review can raise an assessment as easily as lower it. Nothing here is advice to file one, and none of it is an appraisal.

Contact

Questions, corrections, or a problem with a purchase: contact@monrole.ca.

Accuracy complaints are treated as bug reports. If a figure here is wrong, we would rather hear it from you than not.

Refunds

Purchases are not refundable once delivered: the review request ($49) once your dossier link is sent, the figure in dollars ($15) once it is shown. The fee your assessment body charges for a review request is its own, generally not refunded by it, and never covered by us. Review requests bought while the 30-day money back was offered keep it: write to contact@monrole.ca.

The refund goes back to the card you paid with; your bank usually shows it within 5 to 10 business days. Once it goes through, the report on this site locks again.

If you paid and the report never appeared, if it unlocked the wrong property, or if it proves to have been miscomputed, write whenever you notice and you will be refunded in full.

The figure in dollars

While a municipality's review window is closed — from 1 May until its next roll is published — nothing can be filed, so the review request is not for sale. What the free panel shows then is the direction and a band: assessed above or below similar homes, and by more than how much a year, with how many comparable properties that rests on, and three of them. For $15 you get the yearly difference in dollars, the median assessment it is measured against, and all the comparable properties as a table with their matricules, for that one property.

Three things to know before paying. The figure describes the roll in force: it is what the gap costs, or saves, each year that roll stands — not money anyone can claim back. Paying also reserves the property: your email is kept to write to you once, the day the next roll is published, with a link to it, and is then deleted. And the $15 is counted toward the $49 review request on that same property once the new roll is out. The $15 is not refundable once the figure is shown, unless it never appeared, concerns the wrong property, or proves to have been miscomputed.

Reserving your spot for the next roll

On any property whose municipality will file a new roll, you can reserve your spot: one email the day that roll is published. Here is exactly what that involves.

These addresses are never sold or shared, and are used for nothing else. A review request can raise a value as easily as lower it, and the reminder recommends nothing.

Who is responsible for your personal information

Quebec's Law 25 requires this to be named rather than left implied, so here it is.

Max Baker — owner, and the person in charge of the protection of personal information.
MonRôle, 1585 Rue Sherbrooke Ouest, Montréal, Québec H3H 1H5
contact@monrole.ca

The only personal information this site holds is a reservation for the next roll — an email address, a municipality code and, where one was reserved, the roll number of the property — and, after that reservation is used and deleted, the one-way consent fingerprint left behind. Both are described in full above. Payments are handled by Stripe, and no buyer's email address is stored here — the receipt lives with Stripe, not with us. The usage counters hold no personal information at all.

You may ask what is held about you, ask for it to be corrected, and withdraw your consent at any time. The unsubscribe link in the reminder email does the last of those immediately and without asking anyone. For the others, write to the address above.

If you are not satisfied with how a request is handled, the Commission d'accès à l'information du Québec hears complaints.