There's a house on my way to work that's vacant. I saw an ambulance there about two years ago; I'm betting that the owner died, because it's now entirely overgrown, with weeds and grass completely overtaking the yard and driveway.

How many of the 'empty houses' are places that were abandoned and are in such disrepair that they're not safe for habitation, and how many of them are places that are second houses and/or bank-owned rentals?

For reference, the house I live in right now was repo'd around 2010, and my partner and I bought it in 2018; it had been vacant for almost a decade, and required a lot of work, almost as much as it cost, to get it safe. And it still needs work; I need to shore up the floor that's sagging, and the exterior walls need to be opened up from the inside and be fully sealed b/c I can feel breezes inside when it's windy outside.