(1) A single dwelling house is--
(a) a dwelling used solely for habitation by a single household; or
(b) a building consisting of 2 flats used solely for habitation; or
(c) a building consisting of 2 self-contained units, known as a duplex, and used solely for habitation.
(2) Subsection (1)(a) includes a dwelling used solely for habitation by a single household--
(a) part of which is used or available for use as a furnished room or furnished rooms; or
(b) with a single self-contained flat.