Almost everyone has dreamed of owning the largest house in the world, resplendent with gardens, multiple wings and areas to entertain friends and family.
However, Polish architect Jakub Szczesny dreamed of a house five feet wide, with the front door coming through the floor and a bathroom so small you literally have to sit on the loo while you have a shower.
And so, he created the thinnest house in the world in a Warsaw alley. It is only five feet across at its widest, three in some places.
"I think plenty of light is most important, so in order to eliminate the fears of the small space, I used a polycarbonate sheet to make a roof and make the walls to the maximum width," Szczesny says.
He adds: "You don't need that much space to live in, so it is worth considering building smaller scaled, cheaper housing."
The house itself was actually constructed into a frame off-site and slotted into place in the alley.
Who on earth would want to stay in the house? The Israeli writer Etgar Keret has decided he will live and, somehow, work in the house for some part of the year, while other arty types have been invited to come and stay. In his honour, the house has been named Keret House.