Such a house really has to be something you want to build. An exterior wall is about 40 cm thick, so inside you are left with 3.7 x 13.2 m. Such houses do exist, but you definitely have to make compromises. You won't find anything like that in a catalog; it only works with an architect, and one who has done similar projects before. Any company can build it, but with the limited space I would opt for the thinnest possible wall construction. With such tight dimensions, in my opinion, you hardly can avoid a basement, since above ground you simply have very little space on two floors and you certainly don’t want to waste it on a utility room. So the project will definitely not be cheap. In my opinion, it’s only worthwhile if you have a literal building gap in a market with land prices beyond 1000€/sqm. PS: if you google for it, you find a narrow house at Schwörerhaus. But they are over a meter wider, and that really makes a difference here.