In Canada, the average size of a single-family home is 2,400 square feet, while the average size of a multifamily home is 1,250 square feet, as per the Canadian Mortgage and Housing Corporation (CMHC).
However, it's important to note that these are just averages, and there is significant variation in house sizes across North America. For example, in some areas of the United States, such as the Northeast and California, the average house size is much smaller, while in other areas, such as the South and Midwest, the average house size is larger. Similarly, in Canada, there is significant variation in house sizes between provinces and cities.