I now live in a concrete dome. In describing it, there doesn't seem to be a word here (in Spanish) that really describes this. The closest we get is is el horno meaning the oven. That is because there are outdoor ovens, made of adobe, that people use to cook rosquillas (a "cookie" for which there is no word in English).

My solution is to just say that I live in la casa redonda, the round house.It makes sense as the base is round and even the top is round.