I have to confess I'm not sure. :( Searching for vacancy rate shows that is around 9%. I would expect these are owned by someone, though, such that I don't know why they would not be counted as investments?

Doing the same search for "owner occupied" shows only around 50%, though. I don't know where to get the data that teases apart housing units and standalone houses.

Where are you seeing 9% vacancy rate in California? According to FRED, the current rental vacancy rate in CA is below 5, and the current home vacancy rate is below 1.

Hmm... I thought I just took the basic google, but that seems to give a different result now. Maybe I just fat fingered copying into here, not sure.

I know that my main assertion there was it was a relatively lower number. Adding it to the 19 of this story would still leave owner occupied higher than 50ish. Such that I clearly need help to put a lot of this together.