The homes run as small as 350 square feet.

Mata, who says all the 12 tiny homes he repped sold in less than a year, tells Realtor.com that the typical buyer was a single individual, often a college student or downsizing older person.

That's small relative to US houses today, but even the smallest size they have there is 60% larger on a per capita basis, if there's an individual resident, than houses were in 1900 in the US.

https://www.windermere.com/blog/how-the-american-home-has-evolved

Owning a home has been an American tradition from the start. But the home itself has changed dramatically over the years.

For example, you may be surprised to learn how much the size of the average American home has increased since the turn of the 20th century—especially when you compare it to the size of the average family during the same time period.

In the year 1900, the average American family was relatively large with 4.6 members, but the average home featured just 1,000 square feet of usable floor space. By 1979, family size had shrunk to 3.11 members, but the floor space they shared had expanded to 1,660 square feet. And by 2007, the average family size was even smaller still—just 2.6 members—while the average home size had increased by the largest amount yet—this time to 2,521 square feet.

In 1900, 217 square feet per capita.