Interesting.
Most apartments up to 4 or 5 floors are wood frame
Yes, we know about this. Here in EU we often wonder how you still build houses that termites can eat, hurricanes can blow away and you need to chop down a smaller forest to build.
Mediterranean, where I grew up was historically mainly stone building:
This stuck later on as a reliable way of building durable homes:
And it ended up presenting status and money. Today, it's among the most expensive ways to build with all the artificial materials around. This one might as well be woth its weight in gold (being from hard white stone right next to the sea):
Less moeny? You still build hard walls, brick and mortar. Closer to coast you find more of this air enclosing brick:
Further inalnd and it's this old full brick similar like England's brick-work:
There use to be some wooden building usually asociated with poverty (fast, easy building that wouldn't stand for long):
And, of course, some combining: