xmlns:atom="http://www.w3.org/2005/Atom"
(1)A “house” is a separate set of premises (on one or more floors) which—
(a)forms the whole, or part, of a building, and
(b)is constructed or adapted for use for the purposes of a dwelling.
(2)But where the separate set of premises forms part of a building, it is not a house if the whole of or a material part of the set of premises lies above or below some other part of the building.