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
- It is set every three years, not continuously. Quebec municipalities file a triennial roll. Between filings, a property's assessed value generally does not move, even if the market does.
- It is already out of date the day it takes effect. A roll reflects market conditions roughly eighteen months before it comes into force. Montréal's 2026–2028 roll, filed in September 2025, is based on the market as of 1 July 2023.
- Municipalities file on staggered schedules. Two neighbouring towns can be working from reference dates years apart, so comparing their assessed values directly compares two different moments in the market.
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
- Judging whether your own assessment is fair. If you are contesting an assessment, the relevant comparison is other properties' assessments — which is exactly what the comparables feature shows.
- Seeing direction and magnitude over time. The multi-year trend is meaningful because the same lag sits at both ends of the comparison and largely cancels.
- Comparing like with like in one municipality, where every property was assessed on the same basis at the same reference date.
What this site can and can't tell you
| Question | Can 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
- Property lines are indicative. Quebec's cadastre shows the graphic limits of a lot. Only a bornage by an arpenteur-géomètre establishes a legal boundary. Do not rely on these lines for a fence, an encroachment, or a purchase.
- Aerial imagery is offset. The imagery's own horizontal accuracy is about 8.5 m at the median. On a narrow urban lot that can exceed a full lot width, so a boundary may appear shifted against the photo even when it is correct.
- Some properties show "unavailable". Where a value, trend, category or comparable set cannot be attributed with confidence, we say so rather than showing an approximation. A blank is deliberate.
- Zoning covers about 19% of properties. Quebec has 1,101 municipalities and each writes its own bylaw; only a handful publish machine-readable zone maps.
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:
- Québec
- Gatineau
- Longueuil
- Saguenay
- Lévis
- Sherbrooke
- Trois-Rivières
- Repentigny
- Shawinigan
- Rouyn-Noranda
- Rimouski
- Saint-Hyacinthe
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:
- Ville de Québec
- Ville de Gatineau
- Ville de Longueuil
- Ville de Saguenay
- Ville de Lévis
- Ville de Sherbrooke
- Ville de Trois-Rivières
- Ville de Repentigny
- Ville de Shawinigan
- Ville de Rouyn-Noranda
- Ville de Rimouski
- Ville de Saint-Hyacinthe
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
- Street map — OpenFreeMap, © OpenMapTiles, data from OpenStreetMap contributors
- Map rendering — MapLibre GL
- Provincial outline — geoBoundaries, derived from Statistics Canada boundary files
- Street View links — open Google Maps; no imagery is reproduced here
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.
- Nothing here is an appraisal, a legal opinion, or advice on a purchase, sale or financing decision.
- Zoning information is a convenience copy. Confirm the applicable zone and its rules with the municipality before relying on them.
- Property lines are graphic and must not be used to determine a legal boundary.
- Data is provided as published by its sources and may contain errors, omissions or out-of-date records.
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 assessed value as the roll states it — land, building, the previous roll, and the market reference date the assessment actually speaks to. That date decides which evidence counts, and most owners have never been told it.
- The estimated annual difference against the median of the comparable properties nearby, and where this property sits among them.
- Those comparable properties as a table — address, assessed value, building area, lot area, year built — drawn from the public roll, so an assessor can check every line of it.
- The history of this assessment, roll by roll, as far back as the public rolls carry it for this property.
- Whatever in the assessor's own record is worth raising. The roll marks some of its own entries as estimated; where it does, the dossier says which.
- Which body the review request is filed with, and the deadline that applies. It goes to the assessment body, not the municipality — a distinction that costs people their deadline every year.
- The government's own review form, already filled in. The province publishes a fillable form; we hand you a copy with the boxes we can answer already answered — municipality, civic number, street, lot, the roll years, and the two boxes that ask you to state your case, written out with your figures. Your name, your contact details and your signature are what remain. We leave the market-value box empty on purpose: it asks what the property would sell for, and this project holds no sale prices.
- The method and its limits, printed on the document rather than kept off it, including that this compares assessments with assessments and holds no sale prices.
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.
- What we keep: your email address, your municipality's code and the property you reserved (its number on the provincial roll, not your name). Nothing else. Sign-ups made before October 2026 name only the municipality.
- Why: to send you one email, when your municipality's roll is published — and, if you reserved a property, so that email can say what the new roll shows for that property.
- How long: your address, your municipality and the property are deleted at the moment that email is sent. A reservation that was never used is deleted 30 days after the review deadline of the roll it was waiting for; a sign-up without a property, after twenty-four months.
- What remains afterwards: a proof of consent, as a one-way fingerprint — enough to answer "did this person consent?" if we are asked, and impossible to turn back into a mailing list.
- To remove it sooner: the unsubscribe link at the bottom of the email deletes it immediately. We keep no unsubscribe list — the record simply goes.
- To reach us: contact@monrole.ca.
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.