The 300 square foot, 1 bed / 1 bath "bungalow" at 128 Day Ave. in Toronto is that city's smallest house, and at $600 per square foot, quite a bit over the average for the neighborhood. It's also currently for sale at the price of $179,900. The lot itself is 824 square feet, and includes two parking spots in back (front-to-back, one would assume). If you want a really small house, though, you have plenty of other options.