Quote:
A semi-detached house is split vertically, so it has a left-side and a right-side. If it were split horizontally (with a top and a bottom) this'd be a maisonette (I think).

"Maisonette" seems to mean different things to different people. I've heard it used like that, to mean "a small block of flats, so small we don't want to use the phrase 'block of flats' as it puts people off", but I've also heard it used to mean "a horizontal slice of a larger building, but one on more than one level so the word 'flat' doesn't sound right".

Peter