Well, this certainly explains why there are so many building below 4 storeys compared to taller ones, but since most people live in those smaller buildings, I'm not sure what that has to do with the discussion. Moreover, luxury and height don't have any real correlation - there are any number of brutally utilitarian hi-rises as well as lavish single-storey homes. And yet, marble tiles aren't much harder to install than Terra cotta, but will make the house fetch a disproportionately higher price on the market. Hence why granite countertops, for instance, are very popular in new homes and renos right now.