[themaninthedark]

Here you go, same info for crawl spaces as well.

> 30 percent of new single-family homes started in 2013 have a full or partial basement, 54 percent are built on slabs, and 15 percent have a crawl space.

https://eyeonhousing.org/2014/10/what-foundations-are-built-...

I think you are looking at a small subset of data.

[WalterBright]

So it's still half the homes. How many millions of homes is that?