Complex sentence: The houses do not share dividing walls, but are separated from the others, is not known whether a reflection of the idiosyncratic to this culture or because of the difficulty to do in the circular building.
Split into simpler sentences: The houses do not share dividing walls, but are separated from the others. It is not known whether this is a reflection of the idiosyncracies of this culture or because of the difficulty to do in a circular building.