Why anyone would want to build a round house is a mystery to me. The 'Round House' in Cheadle is tiny.
In the nineteenth century, it only served as a lodge to a bigger property up the hill, so maybe it was just a whim to build it.
It was lived in as a residence, amazingly, until just a few years ago (split into four minuscule rooms!) - and then a local benefactor bought it and restored it.