What is the average building area of a household in Japan?

100 square meters to 300 square meters. Japanese household refers to "one house on the first floor", which is equivalent to the concept of "villa" in China. Generally speaking, a family building is a small wooden structure with 2-3 floors, which usually consists of a small courtyard, a parking lot and some private roads. The area is usually about 100 square meters to 300 square meters, including kitchen and dining room, living room, bathroom and storage space.