There are several types of housing in Riverdale and it is interesting to look at American, Canadian and British terminology. The definitions come from Census Canada for census purposes.
Row house – One of three or more dwellings joined side by side (or occasionally side to back), such as a town house or garden home, but not having any other dwellings either above or below. We also use the term Townhouses but in England they are referred to as Terraced Housing (3.2% of housing in North Riverdale)

Semi-detached house – One of two dwellings attached side by side (or back to front) to each other, but not to any other dwelling or structure (except its own garage or shed). A semi-detached dwelling has no dwellings either above it or below it, and the two units together have open space on all sides. In the US this is called a Duplex. ( 33.9% of housing in North Riverdale)



Apartment without direct ground access in a building that has fewer than five storeys – A dwelling unit attached to other dwellings, commercial units or other non-residential space in a building that has fewer than five storeys. The dwelling's private entrance is not at ground level, nor can it be reached by a private or common outside stairway that leads from the ground, or raised terrace/patio, to the dwelling's private entrance.
Some of the rental Units on Victor must be like this.