Is it a place to live that is smaller than where I currently live? Is it a specific amount of interior square footage per person? Is it a house that is smaller than the average new house in the USA? Is it a house the same size as the average house somewhere in Europe or Japan? Is it a backyard cottage? A place that retirees downsize into? A house that was built in 1950?
In attempting to answer this question for myself, I typed lots of words into Google: small home, small house, downsize house, house size, small house size…you get the idea. There are many answers to this question. I found articles and blogs discussing housing trends and how the recent recession reduced the average new house size a little. I found a Wikipedia article on the Small House Movement (AKA the Tiny House Movement). There are articles discussing how our energy use increases with the size of our homes.