Good morning and many thanks to everyone who has written many quite constructive contributions here! To sum it up: as long as you approach the (preliminary) planning with common sense, you can't go very wrong. Things like external sewage, bathrooms on the upper and ground floors stacked, walls aligned (structural), no unnecessary corners, door installation (65 cm), I have already considered at the appropriate points. Spatial thinking is not difficult for me, and I really enjoy the whole planning process! Since Saturday, the 3rd draft has already been created, which we now want to give to our architect. Of course, I am fully aware that despite careful considerations, mistakes can still occur in the sketch. It is only meant to be a collection of ideas.... As soon as I have something presentable, I will get back in touch! Thanks again to everyone! Regards Daniel