St. Catharines duplex, triplex and fourplex report
By Sandy MacKay · Data as of September 23, 2026 · Updated weekly
Over the last 12 months, 38 duplex, triplex and fourplex properties came to market in St. Catharines. The median asking price was $519,450, which works out to $212,000 per unit. Cost per unit falls as unit count rises: duplex, up and down listings ask a median $257,225 per unit, triplex listings $218,150. The median listing took 38 days to leave the market, but 56 days counting earlier listings of the same property, and 18% were relisted at least once. Asking prices and listing activity, not sales counts.
Came to market, 12 months
38
duplex, triplex and fourplex
Median asking price
$519,450
last 12 months
Median price per unit
$212,000
asking price ÷ units
For sale now
10
active listings
Median days on market
38 days
listing to exit
Median counting relists
56 days
including earlier listings of the same property
Relisted at least once
18%
of listings that left the market
Measured over
117 listings
since September 2024
What a unit costs, by building size
The same money buys more doors in a larger building. This is asking price divided by the number of units in the listing, so it is a cost comparison, not a yield.
| Property type | Units | Listings, 12 months | Median asking price | Median per unit | Median days on market | For sale now |
|---|---|---|---|---|---|---|
| Duplex, side by side | 2 | 7 | $449,000 | $224,500 | 25 | 2 |
| Duplex, up and down | 2 | 12 | $514,450 | $257,225 | 35 | 5 |
| Triplex | 3 | 13 | $654,450 | $218,150 | 39 | 1 |
| Fourplex | 4 | 6 | $949,450 | $237,363 | 59 | 2 |
St. Catharines neighbourhoods, cheapest per unit first
Every St. Catharines neighbourhood with at least 15 duplex, triplex or fourplex listings in the period. A low price per unit reflects the building and the street; it is a starting point for a shortlist, not a promise of return.
| Neighbourhood | Listings | Median asking price | Median per unit | Median days on market | For sale now |
|---|---|---|---|---|---|
| E. Chester | 24 | $449,000 | $212,000 | 43 | 2 |
| Downtown | 33 | $539,000 | $224,975 | 43 | 2 |
How much comes to market, month by month
| Month | Came to market | Median asking price |
|---|---|---|
| August 2026 | 3 | $599,900 |
| July 2026 | 1 | $419,000 |
| June 2026 | 7 | $449,000 |
| May 2026 | 3 | $499,900 |
| April 2026 | 5 | $649,900 |
| March 2026 | 1 | $649,000 |
| February 2026 | 3 | $644,900 |
| January 2026 | 3 | $639,900 |
| December 2025 | 3 | $699,000 |
| November 2025 | 1 | $749,900 |
| October 2025 | 5 | $499,900 |
| September 2025 | 6 | $479,000 |
How to read this
- Source: MLS listing data for St. Catharines, read every week by the Found Spaces team. It covers listings recorded as duplex (up and down, or side by side), triplex and fourplex.
- These are asking prices, not sale prices, and this page reports no sales counts. The feed behind it is IDX-style: when a property sells it usually leaves as terminated rather than sold, so counting sales here would understate the market badly. Sales, sale prices and inventory for St. Catharines are on the St. Catharines market report, which uses a different source.
- Price per unit is the asking price divided by the units the listing declares. It compares cost, not income: two buildings at the same price per unit can rent for very different amounts.
- Days on market resets when a listing is cancelled and relisted, so the page shows both the median for a single listing and the median across every listing of the same property.
- Medians, not averages, because one unusual building moves an average in a sample this size.
Cite as: Found Spaces Realty Group, St. Catharines Duplex & Multiplex Report, September 2026, foundspacesrealty.ca/market-reports/st-catharines/multiplex.
What it means for you
Buying or selling a multiplex in St. Catharines?
A median tells you the shape of the market, not what a specific building is worth. Rents in place, unit mix, whether the units are legal, and what it costs to fix the gap decide that. We run those numbers on a property before anyone gets attached to it.
Want to run the numbers yourself? Our underwriting standard publishes the expense assumptions, the formulas and a prompt you can paste into an AI assistant. More on how we work with investors: Hamilton investment properties.
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