Duplex, triplex, fourplex: what the words actually mean

The counting, and the words people confuse

Start with the simple part. A duplex is a building with two homes. A triplex has three, a fourplex four, a fiveplex five, a sixplex six, an eightplex eight. Some listings write fourplex as 4plex or four-plex, and all three mean the same thing.

Now the confusing part. A half duplex is one of the two homes inside a duplex, and it is what you actually buy. When somebody says they bought a duplex in Vancouver, they almost always mean they bought half of one. If a listing genuinely offers the whole building, it will say so and the price will make it obvious.

Townhouse causes the other muddle. A townhouse describes a shape, which is a home on several floors with its own entrance at ground level, while a fourplex describes a count. A four home building can be arranged as four townhouses, and it can also be arranged as four flats stacked in pairs. The word in the listing tells you less than the floor plan does.

What changes as the number goes up

The difference between a triplex and a sixplex is not really about size. It is about how many people you share decisions with, and how the shared costs divide.

In a two or three home building, the owners are the strata and every decision is a conversation between two or three households. That is fast when everybody agrees and awkward when they do not, because there is nowhere to hide and no majority to appeal to. In a six or eight home building there are more people to share a repair bill and more people whose agreement you need.

Shared costs behave the same way. A roof costs what it costs, and it is divided between the homes in the building. Splitting it four ways is easier on each household than splitting it two ways. That is the honest argument for the larger formats, and it is rarely the one buyers hear.

The trade goes the other way on space and quiet. Fewer homes usually means more room in each one, more outdoor space attached to your home, and fewer people passing your window. Which of those matters more is a genuine preference rather than a right answer.

What is the same across all of them

Whatever the count, several things do not change, and knowing them saves comparing the wrong features.

Each home is a strata lot with its own title, so you own a home rather than a share of a company. Each home pays its own strata fee toward the shared costs of the building, allocated by the schedule registered for that strata. Each owner is automatically a member of the strata corporation, and in a small building that means you are on the council whether you wanted to be or not.

New home warranty is also the same across formats. BC Housing requires warranty insurance on new homes built by a Licensed Residential Builder, with minimum coverage of 2 years on materials and labour, 5 years on the building envelope, and 10 years on the structure. A duplex and an eightplex carry the same protection.

And there is no published price benchmark for any of them. Greater Vancouver's MLS® Home Price Index, in its July 2026 report, publishes benchmarks for detached homes, apartments and townhouses, plus a composite for all residential properties. Multiplex is not one of the categories. Anybody quoting you an average multiplex price or an appreciation rate for multiplexes is quoting something no board publishes.

That last point deserves a moment, because it cuts against a lot of what you will read elsewhere. When a page tells you that multiplex homes appreciate at some annual rate, or that the average multiplex in Vancouver costs a particular amount, ask where the number came from. There is no index behind it. The honest position is that prices for these homes vary enormously by neighbourhood, size and layout, and the way to understand them is to look at actual homes currently for sale in the areas you care about.

One more thing is constant across formats: you are buying into a strata, so a set of documents governs the building. The bylaws say what you may do with your home. The strata plan says what belongs to you and what is common property. The budget and the depreciation report say what the building spends and what it expects to spend. Those four documents matter more to your life in the home than the word in the listing, and they are available before you buy in every case.

A last note on where these homes are. Multiplex buildings sit on ordinary residential streets, on lots that used to hold one house, which means the neighbourhood around them is a neighbourhood of houses rather than of towers. For many buyers that is the entire appeal: a brand new home with its own front door, on a street with trees on it, in an area they could not have afforded as a detached buyer. The format matters much less than that.

A well built duplex and a badly built duplex are further apart than a duplex and a fourplex. Who built the home, what the warranty covers and how the strata is run will tell you more about the next ten years than the count of front doors ever will. Judge the building and the neighbourhood first, then let the format follow from which homes in those buildings actually suit your household.

If you take one practical step from this page, make it this: before you shortlist by format, write down the three things your household genuinely cannot compromise on. Bedrooms, step-free access, outdoor space, a particular school catchment, a commute under a certain length. Then look at every format that contains homes meeting those three. Most buyers find the list is shorter than they feared and wider than they assumed.

Finally, the format does not determine quality. A well built duplex and a badly built duplex are further apart than a duplex and a fourplex. Who built it, what the warranty covers and how the strata is run will tell you more about the next ten years than the count of front doors ever will.

Everything in this guide

Each page below answers one question in full. Read them in order or jump to the one you need.

Questions buyers ask

Also worth reading

• Duplexes for saleCurrent duplex homes on the market across Greater Vancouver
• Triplexes for saleCurrent triplex homes on the market
• Fourplexes for saleCurrent fourplex homes on the market
• Multiplex compared with a condo or townhouseHow these homes compare with the other ways of buying in this price range