I don't really know what you mean by that? What determines whether or not a building is "mortalish" or not? According to the wiki the people who reside in Heaven enjoy dancing, fishing, and food so they sound like they have pretty "mortal" tastes.
For houses, we can have various symbols on top of the ceiling. For example, for Hinanai family estate, have two peaches on top of the ceiling. Then we can base from there various other Celestial family estates' looks.
Originally posted by Keychain I'm afraid I don't follow. By "on top of the ceiling" do you mean the roof?
Yes. To give proud and arrogant Celestials some sort of way to exert their power, putting their symbol on top of the roof could be a good idea to fancify a bit.
It might make sense but I can't imagine it looking good at all. Since peaches are quite small it'd be improbable to make them without making them too big. I will try to do something like that though, as it seems like a good idea. Thanks for the suggestion!