Hello Kisska, I am currently facing a similar problem. We have bought a plot of land that is almost identical to yours in terms of location and size proportions. (29 meters wide and 19 meters deep, orientation and access like yours). The difference, however, is that our plot does not slope down but rises towards the back. A big advantage, in my opinion, is that you can build the basement almost at ground level and not underground. This of course brings a lot of daylight and creates a full living floor. I see a size disadvantage in the appearance of the house. My wife loves the currently very popular "Stadtvillen". In our case, this would mean that three stories are visible. It can quickly look quite "boxy". I do not yet know how we will solve this problem... However, I see more advantages than disadvantages...