In the search for our first flat some years ago, Mrs Tyred and I saw some curious things. Winner by a country mile though was a tenement flat in the south side of Glasgow (nice, popular area) that we were shown round by a friend of the owner.
Everything was normal until you reached the lounge, which was generously proportioned with a high ceiling and bay window, commonplace in that type of building.
Only difference was the guy had constructed some kind of large indoor shed in the middle of the room - four stud walls, painted plasterboard, no windows, artexed ceiling of some kind (maybe 2/3 the height of the room itself), carpet nailed to the walls inside, complete with vertical chimney pipe straight into the ceiling. "This is where he likes to come and do his music" was the explanation. It just sat there like some weird giant box, with a few feet of space on each side, into which he'd crammed normal lounge furniture.
We squeezed around all that to reach the kitchen, which had a curiously heavy door. "That's actually a ship's door you know," remarked our guide. Behind it, the small galley kitchen looked like a Salvador Dali surrealist work - everything plastic (handles, cupboard facades, light fittings, oven knobs etc) had been melted to varying degrees and the ceiling was black. "He's had one or two fires over the years I think" mused the friend.
Aye cheers pal, we'll let you know.