[penneyd]

They just do the same thing with regular homes :)

[MarkusQ]

Sadly, that's at least partially true. But rebuilding on a sight where a home was destroyed eliminates the information value (that this site isn't safe from tsunami) and the coverage is far from uniform/regular (so you can't tell if there are no buildings in an area because it was previously undeveloped or is unsafe).

[lostlogin]

‘How old are these buildings?’ would be wise to consider.

This probably works for a variety of things and in many places.