Sainte-Agathe-des-Monts Home Prices by Type: Why a Triplex Sells for Less Than a House

In Sainte-Agathe-des-Monts, a triplex sells at the median for less than a house. That runs against intuition, and against what you see in the city. How quickly recreational properties move in the Laurentians is covered in our article on Laurentians recreational property inventory; this one covers a different mechanism: the price ranking between property types, and what the age of the housing stock tells us about it.

353 sales over 24 months: why such a long window

The figures in this article come from the CourtiConnect comparable sales database, for the town of Sainte-Agathe-des-Monts, rentals excluded. The window covers 24 months, from August 1, 2024 to July 31, 2026, and includes 353 sales, only one of which falls outside the five types compared here. Each price is a median: half the sales closed above it, half below.

The window is long on purpose. Buildings with two or more units rarely sell in a town of this size: over twelve months, the plex and triplex samples would be too small for a median to mean anything. Twenty-four months enlarge the sample; they do not measure a trend. No year-over-year comparison is drawn from these figures.

Our market pages do the opposite: one month, one type. The page for houses in Sainte-Agathe-des-Monts in June 2026 is based on 9 sales. It is useful for following a segment; it cannot rank property types against each other.

Median sale prices by property type

Here is the median price for each type over the window from August 1, 2024 to July 31, 2026, with the number of sales behind it:

• house: $482,000 (n = 231);
• plex: $476,250 (n = 12);
• duplex: $452,500 (n = 38);
• triplex: $380,000 (n = 18);
• condo: $330,000 (n = 53).

The house sits at the top. The plex, a category our database keeps separate from duplexes and triplexes, follows closely. The duplex comes next. The triplex drops below the duplex and lands $102,000 under the house, a gap calculated between the two medians. Only the condo sells for less.

Three units for less than one house

The result is surprising because it breaks a simple rule: more units, more value. Here, a buyer paying the median gets three units for less than the median price of a single house. And the triplex sells for less than the duplex, which has one unit fewer.

That does not mean every triplex is worth less than every house. A median describes the middle of a group; it does not describe your building. With 18 sales, the triplex median also remains indicative. But a gap of this size, over two years of sales, says something about the local market, and it comes down to two factors: the age of the stock and the nature of demand.

Building age by type: from 1940 to 1989

The median construction year of the properties sold, on sales where it is recorded, varies sharply by type: condo 1989 (n = 53), house 1985 (n = 221), duplex 1969 (n = 37), triplex 1959 (n = 18) and plex 1940 (n = 11).

The split is clear. The houses and condos that sold date, at the median, from the late 1980s. The multi-unit buildings are much older: 16 years older for the duplex, 26 for the triplex and 45 for the plex, gaps calculated from the house median. An older building more often comes with work to plan, and buyers factor that into their offers.

For a buyer, the construction year works as a checklist. A building from the 1940s or 1950s calls for a close look at its roof, windows, electrical system and plumbing, and the inspection report and the seller's declaration are where those points get documented. For a seller, it means the price of a triplex is set against other old triplexes, not against the newer houses that dominate the local market.

Recreational demand goes to the house

The second factor is who is buying. In a Laurentians town like Sainte-Agathe-des-Monts, part of the demand comes from households looking for a home or a place to spend time in the region. That demand is for houses: a house is what people buy to live in or to spend their weekends in.

A triplex mostly appeals to buyers who think in terms of rental income. There are fewer of them, and they do not pay for the setting or the scenery: they pay for what the building earns and what it will cost to maintain. The house benefits from broad demand; the triplex depends on narrow, demanding demand.

The plex: oldest stock, yet second in price

Age does not explain everything, and the plex shows it. It is the oldest type in the stock that sold, 1940 at the median, yet it ranks second on price at $476,250. Its position most likely owes more to the size of the buildings in this category than to their age.

Caution is warranted: the plex rests on 12 sales, and only 11 carry a construction year. What stands out without ambiguity is the triplex, which combines both handicaps: an old stock and limited demand.

The opposite of what you see in Montreal

In an urban market like Montreal, the ranking runs the other way: multi-unit buildings sell above houses, because rental demand is strong and every unit counts. Anyone arriving in Sainte-Agathe-des-Monts with that instinct risks mispricing a triplex.

For a triplex seller, the practical consequence is that the comparables are triplexes sold in the same town, not neighbouring houses and not Montreal buildings. For a buyer, a local triplex can be an entry price into multi-unit ownership, provided the budget covers the work an older building calls for. Either way, a property's value is measured against genuinely comparable sales in your area.