Vancouver used to be the city with the highest proportion of single family dwelling zoning in North America. It was the example of SFH zoning in "Zoned in the USA", a very good book on the history of zoning in North America.
Vancouver had the highest proportion of single-family house zoning in North America, and the book was really about Canada and the USA, not just the latter.
North American zoning shares a lot of the same origins in both Canada and the USA; Vancouver's first zoning code was drafted by Harland Bartholomew who did a lot of American cities' first zoning codes.