There was a similar case around the Portland area a few years ago. I can't remember what ever happened but I think a group of townhomes were a total loss.

I have a theory that as builders and cities try to build on every sq ft of land this type of thing will become more common. There's a reason a lot of land was left vacant 50 years ago while houses were built all around it.

I see this a lot with water in crawl spaces. I rarely see a wet crawl space in an old house. I see them constantly in new subdivisions.