Levittown-style homes for returning WWII veterans were poor quality -- "little boxes all made of ticky-tack" as the song goes, but even high quality homes of the midcentury were still tiny -- the average size of a US house in 1960 was 1,289 sq ft -- basically apartment sized. And typically only had one bathroom

https://www.newser.com/story/225645/average-size-of-us-homes...