Plexes for sale · Longueuil · Centris 2016-2026
The number of plexes for sale in Longueuil at each month-end, and the number of new listings, year by year since 2016: the peak, the frenzy trough, the absorption rate, months of inventory, and the comparison with single-family houses and condos in the same city. Centris figures, not estimates.
In Longueuil, an average of 183 plexes (2 to 5 unit buildings) were for sale on Centris at each month-end in 2026 (January to September), against 229 in 2016: plex inventory is 80% of what it was ten years ago, a milder decline than in most of the 23 cities tracked (median 58%). The trough was 2020 (127 plexes, -45% from the 2016 peak); since then, inventory has climbed back 44%. The result in 2026: 5.5 months of inventory for plexes (balanced market) against 2.7 for single-family houses (seller's market) and 4.8 for condos. Plexes sell 2.8 months more slowly than houses in Longueuil: an income-property buyer has time to run the numbers, and the seller must list at the price the rents justify. Source: Centris (Matrix), compiled October 7, 2026.
The short answer
In Longueuil, an average of 183 plexes (2 to 5 unit buildings) were for sale on Centris at each month-end in 2026 (January to September), against 229 in 2016: plex inventory is 80% of what it was ten years ago, a milder decline than in most of the 23 cities tracked (median 58%). The trough was 2020 (127 plexes, -45% from the 2016 peak); since then, inventory has climbed back 44%. The result in 2026: 5.5 months of inventory for plexes (balanced market) against 2.7 for single-family houses (seller's market) and 4.8 for condos. Plexes sell 2.8 months more slowly than houses in Longueuil: an income-property buyer has time to run the numbers, and the seller must list at the price the rents justify.
New listings, sales and plexes for sale per year
| Year | New listings | Sales | Absorption | Active, monthly average | Active, end of period | Months of inv., plexes | Months of inv., houses | Months of inv., condos |
|---|---|---|---|---|---|---|---|---|
| 2016 | 569 | 309 | 54% | 229 | 195 | 8.9 | 5.4 | 12.7 |
| 2017 | 590 | 339 | 57% | 203 | 199 | 7.2 | 4.1 | 8.9 |
| 2018 | 666 | 373 | 56% | 219 | 234 | 7.0 | 3.5 | 6.5 |
| 2019 | 625 | 452 | 72% | 199 | 131 | 5.3 | 2.5 | 3.1 |
| 2020 | 582 | 468 | 80% | 127 | 106 | 3.3 | 1.9 | 1.7 |
| 2021 | 684 | 504 | 74% | 133 | 118 | 3.2 | 1.4 | 1.6 |
| 2022 | 666 | 385 | 58% | 155 | 163 | 4.8 | 2.4 | 2.2 |
| 2023 | 577 | 256 | 44% | 195 | 203 | 9.1 | 3.3 | 2.7 |
| 2024 | 583 | 378 | 65% | 181 | 130 | 5.7 | 3.0 | 3.0 |
| 2025 | 637 | 445 | 70% | 150 | 135 | 4.0 | 2.7 | 3.5 |
| 2026 (Jan. to Sept.) | 557 | 283 | 51% | 183 | 209 | 5.5 | 2.7 | 4.8 |
Income property category (2 to 5 unit plexes), whole municipality of Longueuil, Centris (Matrix). Absorption: sales ÷ new listings of the same year. Months of inventory: active ÷ monthly sales. 2026: nine months (houses: eight months, September 30 harvest).
What ten years of inventory say about plexes in Longueuil
- Four markets in ten years in Longueuil: 211 plexes for sale on average in 2016-2019, 133 during the 2020-2022 frenzy, 188 when high rates returned, 150 in 2025 and 183 in 2026.
- Inventory peak: 2016 (229); trough: 2020 (127). Between the two, the choice offered to an income-property buyer was divided by 1.8.
- New listings: 684 in 2021 at the high, 569 in 2016 at the low, 637 in 2025. 12% more plexes are being listed than in 2016: aging owner-occupants are selling, and investors exit when the rents no longer cover the mortgage at today's rates.
- Absorption rate (year's sales ÷ new listings): 54% in 2016, 74% in 2021, 70% in 2025. More than seven plexes listed out of ten find a buyer within the year.
- Plex months of inventory (plexes for sale ÷ monthly sales): 8.9 in 2016, 3.2 in 2021, 4.0 in 2025, 5.5 in 2026. Under 4 months, the seller leads; above 6, the buyer.
- Plex versus house in Longueuil: 5.5 months of inventory against 2.7 in 2026; in 2016 it was 8.9 against 5.4. House inventory is 49% of 2016, plex inventory 80%. Condos, for their part, stand at 4.8 months: the plex is the slowest of the three products in Longueuil.
- 2026 (Jan. to Sept.) versus 2025: average plex inventory is up 22% (150 to 183), and new listings are running at 743 at an annual pace (+17%, a simple twelve-month projection). End of September 2026: 209 active plexes.
- Across the 23 cities tracked, 2026 plex inventory is a median 58% of 2016 (houses: 46%, condos: 65%), it is climbing versus 2025 in 15 cities, plexes sell at least a month more slowly than houses in 22 cities and they are the slowest of the three products in 8.
What it changes when selling or buying a plex in Longueuil
At 5.5 months of inventory, the plex in Longueuil is a balanced market in 2026: enough buildings for a buyer to compare, few enough for a well-priced seller to find a buyer within weeks. Pricing makes the difference: a plex priced at the sector's latest price per unit sells, a plex listed on a 2022 multiplier waits. Houses, meanwhile, remain at 2.7 months: a plex is an investment and sells like one, on the numbers, taking the time it takes. The sector's price per unit and multiplier are in plex prices in Longueuil.
How to read these figures
One count per year for all of Longueuil: what gets listed (flow), what is for sale (stock, month-end average) and what sells, for plexes only. All three come from Centris, brokers' listings; private sales, frequent for small buildings, are not included. Stock is the measure that explains price: when it climbs, each investor has more choice and negotiates on the multiplier. The pages plex prices in Longueuil and price per unit in Longueuil read the same buildings from the price and income side.
Frequently asked questions
How many plexes are for sale in Longueuil in 2026?
An average of 183 plexes (2 to 5 units) active on Centris at each month-end in 2026 (January to September), 209 at the end of September. In 2016 it was 229.
Is plex inventory coming back in Longueuil?
Yes: 183 in 2026 against 150 in 2025 (+22%), and 127 at the 2020 trough. We remain at 80% of 2016 inventory.
Do plexes sell more slowly than houses in Longueuil?
Yes, clearly: 5.5 months of inventory for plexes against 2.7 for houses in 2026. A plex is bought on its numbers: the buyer waits for the leases, the tax statements and the financing, and a building listed above what the rents justify stays listed; a house is bought to live in, by far more buyers.
Source: Centris (Matrix), Statistics module, queries of October 7, 2026 for the municipality of Longueuil: Income property category, new listings and active listings by month over ten years, aggregated by year; plex sales per year from the September 16, 2026 query; single-family houses: queries of September 30, 2026; condominiums: queries of October 7, 2026; compiled by the Loaa & Manseur team, aggregates only, current year partial. The plexes for sale and inventory in 23 cities hub compares the 23 cities.
Our other data series in Longueuil, from the same Centris listings:
- How many homes for sale in Longueuil, ten years
- How many condos for sale in Longueuil, ten years
- Buyer's or seller's market in Longueuil
Each series is recalculated from actual sales, aggregates only.
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Also available in French: version française de ce guide.
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.