[HNo]

>Most homes have a basement or a crawl space.

Not sure if this is true or not in total, but in the Southern US, the vast majority of houses have neither.

[WalterBright]

Places with damp ground need a crawl space.

Attics are another place to put it.

[themaninthedark]

https://www.basementguides.com/why-are-there-no-basements-in...

Since 2000 most homes have been slab construction 60/40 by 2013 78/32.

It is cheaper and quicker to build slab and the way the housing market works means that developers choose what to build.

[WalterBright]

Your cite is about basements, not crawl spaces.

In Arizona, everything was slab-on-grade because the ground was very, very dry. That's not so in most other areas.

The crawl space keeps the wood off the ground where it wicks up moisture and quickly rots. Cement wicks up moisture, too. Try a slab in Seattle, for instance, and your house will soon be uninhabitable from mildew.

[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?