I’ve seen my fair share of tiny apartments and smart furniture concepts conceived with small places in mind, but this following concept will blow your mind. We’re probably looking at the thinnest house ever conceived as it’s supposed to be built in a very narrow space, an alley if you will, between two other buildings. This particular apartment concept comes from Polish architect Jakub Szczesny and the 4-story alley home in the images below will offer you one bedroom, a lounge, a bathroom and a kitchen. In total we’re looking at a 40-feet long house, but it’s not the length that worries us but rather the width of the house. If you’re claustrophobic, then such a living arrangement is definitely out of the question.