Triplex · Full-storey · Detached · 3 dwelling units · 1,659 sq ft
521-523 Rue Rougemont
Longueuil · Carillon / Saint-Pie-X
Ubeestimate™ valuation
$919,000
High confidenceRecalculated from 3 comparable sales in the area
$776,500$1,070,500
By a real estate broker · No obligation · Reply within 24 hours
Ownership history
Last change of ownership
June 27, 2023 3 years ago
Date the current owner was entered on the assessment roll. It is most often a sale, but an estate settlement, a gift or a new construction produces the same entry.
Source: property assessment roll (MAMH). Transaction amounts are not published on the roll; they appear in the Registre foncier du Québec (Quebec land register).
The sales behind the estimate
3 recent sales of similar properties in the area, taken from public deeds.
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Surroundings and accessibility
Wired high-speed internet available in the area50/10 Mbps or more · Based on ISED data for the area. Actual service varies by provider.
Description
This triplex is located at 521-523 Rue Rougemont, in Longueuil. Built in 1961 (65 years old), full-storey and detached, it offers 1,659 sq ft of living space over 2 storeys. The 2026 property assessment sets its value at $644,600 (land: $295,300, building: $349,300), an increase of 37.1% since the previous roll. The lot measures 6,055 sq ft.
The property
- Land use (CUBF)
- Dwelling
- Type
- Triplex
- Number of dwelling units
- 3
- Living area
- 1,659 sq ft · 154.1 m²
- Number of storeys
- 2
- Year built
- 1961 (actual)
- Building type and attachment
- Full-storey · Detached
- Lot area
- 6,055 sq ft · 562.5 m²
- Frontage
- 22.9 m
- Roll number
- 0644-20-1201
Financial details
Assessment roll 2025 · market as of July 1, 2023
- Land
- $295,300
- Building
- $349,300
Total assessment$644,600
- Previous roll
- $470,100
Change+37.1%
Value history
+90.9% since 2018Ubeestimate™ estimateMunicipal assessment
The municipal assessment is the value entered on each year’s roll (rolls are prepared every three years). The estimate applies our model’s market-value-to-assessed-value ratio to that base. Hover over the chart to see each year. For information only.
Neighbourhood profile
2021 Census · Statistics CanadaCarillon / Saint-Pie-X
The immediate neighbourhood of the property (census dissemination area, about 400 to 700 residents), not all of Longueuil.
Population of the immediate area
497
5,025 people/km²
Median age
41 years
17.0% aged 0 to 14
Median after-tax income
$56,800
10% lower than in Quebec
Homeowners
42.9%
210 private households
Population trend
+16.4% since 2001All of Longueuil · annual estimates from the ISQ
Population estimates as of July 1, Institut de la statistique du Québec (ISQ) (2001-2025). Recent years are revised or preliminary.
Data from Statistics Canada’s 2021 Census, aggregated for the property’s statistical area (dissemination area) and not for the property itself. The bar shows the difference from the Quebec average. Values suppressed for confidentiality reasons are not shown.
Water supply
The 3 municipal drinking water distribution systems in Longueuil serve 249,337 people out of a population of about 268,530. Water source: surface water (Fleuve Saint-Laurent).
Source: directory of municipal drinking water distribution systems, Quebec Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs. The directory describes where the water comes from and the size of each system; it contains no test results and does not say which addresses are connected.
Radon
In the Montérégie region, homes tested by Health Canada had a median concentration of 57 Bq/m³, and 8.2% exceeded the Canadian guideline of 200 Bq/m³, out of 110 measurements.
This figure describes a region, not this property. Radon is a natural gas that comes from the ground, but its concentration in a home depends on cracks in the foundation, the drainage and the ventilation: two neighbouring houses can differ by a factor of ten. Only a long-term test on site gives the actual concentration. Test kits cost a few dozen dollars and must stay in place for at least three months during the heating season.
Source: Cross-Canada Survey of Radon Concentrations in Homes, Health Canada, long-term measurements collected from 2009 to 2011. It is the most recent survey published at this scale.
Other properties on Rue Rougemont
See the whole street →Longueuil has 4,365 properties classified as triplex on the property assessment roll.
518
518 Rue Rougemont
Single-family homeEstimate$498,500
531
531 Rue Rougemont
Single-family homeEstimate$547,500
528-532
528-532 Rue Rougemont
QuintuplexEstimate$1,232,500
510
510 Rue Rougemont
Single-family homeEstimate$549,500
507
507 Rue Rougemont
CondominiumEstimate$651,000
505
505 Rue Rougemont
CondominiumEstimate$634,500
Data transparency
Public data
Quebec property assessment roll 2025 (MAMH, open data). Owner names and cadastral data are redacted at the source.
Ubeestimate™ valuation
Statistical model adjusted for the local market, the building’s characteristics and the neighbourhood context. The property is assumed to be in standard condition.
Disclaimer
These estimates do not replace a professional appraisal and are not binding on Ubeestimate™.