Duplex, triplex, quadruplex · Longueuil · 2016-2026
The median price of a duplex, a triplex and a quadruplex in Longueuil every year since 2016, with the number of sales, the price per unit, what the extra unit costs, and the single-family house alongside. Centris sales, nothing estimated.
In Longueuil, the median duplex sold for $696,250 in 2026 (Jan. to Sept.) (108 sales), against $328,000 in 2016 and $504,000 in 2021: +112% in ten years, or $348,125 per unit. The median triplex is worth $900,000 ($300,000 per unit, +121% since 2016) and the quadruplex $1,022,503 ($255,626 per unit, +130%). The third unit costs $203,750 more than the duplex (+29%), the fourth $122,503 more than the triplex (+14%). The median single-family house, for its part, is worth $602,000: the duplex is 16% more expensive than the house. It is one of the most expensive duplexes among the 23 cities tracked (median $500,000). Source: Centris (Matrix), compiled October 8, 2026.
The short answer
In Longueuil, the median duplex sold for $696,250 in 2026 (Jan. to Sept.) (108 sales), against $328,000 in 2016 and $504,000 in 2021: +112% in ten years, or $348,125 per unit. The median triplex is worth $900,000 ($300,000 per unit, +121% since 2016) and the quadruplex $1,022,503 ($255,626 per unit, +130%). The third unit costs $203,750 more than the duplex (+29%), the fourth $122,503 more than the triplex (+14%). The median single-family house, for its part, is worth $602,000: the duplex is 16% more expensive than the house. It is one of the most expensive duplexes among the 23 cities tracked (median $500,000).
Median price by type and by year
| Year | Median duplex (sales) | Median triplex (sales) | Median quadruplex (sales) | Median house |
|---|---|---|---|---|
| 2016 | $328,000 (102) | $406,900 (129) | $445,000 (23) | $269,750 |
| 2017 | $330,000 (130) | $410,000 (129) | $500,000 (25) | $288,000 |
| 2018 | $350,000 (135) | $460,000 (167) | $417,500 (20) | $300,000 |
| 2019 | $369,000 (151) | $510,000 (200) | $500,000 (29) | $325,000 |
| 2020 | $435,000 (181) | $583,500 (186) | $600,000 (43) | $387,000 |
| 2021 | $504,000 (163) | $674,450 (212) | $732,500 (42) | $485,000 |
| 2022 | $589,000 (136) | $782,242 (166) | $800,000 (35) | $530,000 |
| 2023 | $575,000 (93) | $750,000 (107) | $804,000 (22) | $500,000 |
| 2024 | $610,000 (133) | $805,000 (158) | $765,000 (27) | $545,000 |
| 2025 | $702,000 (153) | $833,000 (193) | $957,000 (42) | $585,000 |
| 2026 (Jan. to Sept.) | $696,250 (108) | $900,000 (143) | $1,022,503 (21) | $602,000 |
Median sale price and number of sales by year, Income property category, Duplex, Triplex and Quadruplex types, Centris (Matrix), October 8, 2026 harvest; house: median price of single-family houses, September 16 query. 2026: January to September.
What ten years of prices say in Longueuil
- Ten years: duplex +112%, triplex +121%, quadruplex +130%, house +123% in Longueuil. The quadruplex rose the fastest. Since 2021: duplex +38%, triplex +33%, quadruplex +40%.
- Per unit in 2026: $348,125 in a duplex, $300,000 in a triplex, $255,626 in a quadruplex; in 2016, it was $164,000, $135,633 and $111,250. The cheapest unit is in the quadruplex.
- Peaks and dips: duplex at its highest in 2025 ($702,000), down in 2023, 2026; triplex at its highest in 2026, down in 2023.
- The duplex accounts for 41% of the 3,604 duplex, triplex and quadruplex sales in Longueuil since 2016 (1,485 duplexes, 1,790 triplexes, 329 quadruplexes).
- Across the 23 cities tracked, the median duplex went from $221,000 to $500,000 (+122%), the triplex from $240,000 to $569,500 (+121%) and the quadruplex from $327,000 to $703,250 (+102%), against +133% for the house; a unit is worth $250,000 in a duplex and $175,812 in a quadruplex, and the duplex costs more than the house in 12 cities out of 23.
What it changes for buying or selling a plex in Longueuil
In Longueuil, the duplex is expensive, $696,250 in median, and it is priced about like a house (the median house is worth $602,000). This is the owner-occupant's market, someone who rents out the other unit to lighten their mortgage, more than the pure investor's: at $348,125 per unit, the rent rarely covers the loan with 20% down. The triplex and quadruplex, at $300,000 and $255,626 per unit, are the buildings where the yield calculation makes sense again, and where buyers are investors comparing with other cities. The price of all plexes combined and its trajectory are in plex prices in Longueuil; the time to sell a building, in plex days on market in Longueuil.
How to read these figures
One price per year and per type for all of Longueuil. Ten-year increases are read with the number of sales beside them: a triplex at $900,000 on 143 sales in 2026 is a solid benchmark, a quadruplex on 21 sales is an indication. The years of decline shown are often changes in the mix (more small buildings sold one year) rather than a real drop; read three-year trends. The price per unit does not replace the gross rent multiplier, which is in our plex-per-unit pages.
Frequently asked questions
How much is a duplex in Longueuil in 2026?
$696,250 in median in 2026 (January to September, 108 sales), or $348,125 per unit; $328,000 in 2016 and $504,000 in 2021. The duplex rose +112% in ten years in Longueuil.
And a triplex or a quadruplex in Longueuil?
Triplex $900,000 ($300,000 per unit), quadruplex $1,022,503 ($255,626 per unit). The extra unit costs $203,750 between the duplex and the triplex and $122,503 between the triplex and the quadruplex.
Does a duplex cost more than a house in Longueuil?
Yes in 2026: $696,250 against $602,000 for the median house, 16% more. The duplex is priced like a house with a rent on top; that is the case in 12 cities out of 23.
Sources: Centris (Matrix), Statistics module, October 8, 2026 query for the municipality of Longueuil, Income property category, Duplex, Triplex and Quadruplex types, median sale price and number of sales by year; median price of single-family houses, September 16, 2026 query; compiled by the Loaa & Manseur team, aggregates only, current year partial. The duplex, triplex and quadruplex prices in 23 cities hub compares the 23 cities.
Our other data series in Longueuil, from the same Centris listings:
Each series is recalculated from actual sales, aggregates only.
Our proof, not our promises
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Published September 7, 2026 by the Loaa & Manseur team, the number 1 team at RE/MAX Platine in 2024 and 2025, 6th RE/MAX team in Quebec, 15th in Canada and in the global top 50 according to the official RE/MAX ranking. Tell us about your project.