This map shows the percentage of occupied dwelling units that are "Single Detached". Compare that to the corresponding maps based on 2011 data and based on 2006 data. Stats Canada defines a dwelling as Single Detached as

A single dwelling not attached to any other dwelling or structure (except its own garage or shed.) A single-detached house has open space on all sides, and has no dwellings either above it or below it.

Thus it differs from the definition used in many municipalities and zoning codes that often permit basement suites. In the context of Vancouver's zoning laws, RS zones allow for one basement suite and a laneway house for an RS-zoned property. For Stats Canada, an RS-zoned house without any basement suite is classified as Single Detached, if it has one basement suite it is classified as Duplex. If it has a laneway house, the laneway house would be classified as a separate Single Detached property. This leads to significantly different counts of single detached homes, depending on the definition. By the City's definition, Vancouver has about 75k Single Detached properties, Stats Canada lists 41,330 in the 2016 census making up 14.6% of dwelling units, down from 47,530 in the 2011 census comprising 18% of dwelling units and from 48,365 in the 2006 census comprising 19.1% of dwelling units. In this context it is interesting to map the percentage of homes that are single detached or duplex.

This difference allows us to observe the "multi-family creep" that is happening in RS zoned neighbourhoods. On the East Side in Vancouver there are almost no areas left with over 50% Single Detached dwelling units. The only larger area with a percentage of Single Detached houses above 90% is along the Granville Street corridor south of Shaughnessy.