My house is a gorgeous old townhouse in a medieval, hilltop village, which I singlehandedly restored over a five year period. It was a complete wreck when I bought it. The building is stone with walls three feet thick and concrete tile floors, so it stays relatively cool in the summer but gets chilly, and in some rooms damp, in the winter.
I bought two small wood stoves to solve that problem this season.
That sounds like Harry's villa in the book. He also complains that it it drafty.