Better hope there's not a fire on your stairs.
Try right now in Japan.
Poland actually, but it doesn't meet building code so it's actually designated as an "art installation." While it's definitely interesting, it's got a number of issues, the big one as I mentioned earlier, it's only got one fire escape, unless you count jumping out of a second or third story window or rolling off the roof. The building is also 28" at it's thinnest. This isn't legal and will never be legal, because all buildings must be wide enough for a firefighter to fit through with an oxygen tank.
It certainly does have some interesting ideas in it, like the combination under counter fridge/2 burner cook-top, the stairs also collapse. Something I would have liked to see is recycling the water from the shower (I think that's a shower on the wall by the toilet anyway) in a gray water tank to flush the toilet, instead of putting it all in the single sewage tank. Also the shell could hold quite a bit of storage in it, there's what looks like a small storage hatch under the kitchen, but there's places in the shell you could definitely build in more storage. Not that you're going to own much if you live in this house anyway.