New single-family house ~160m² + basement - first draft

Many amateur planners hope for a groundbreaking first step on the blank sheet by using some key data or basic features of a model they like as a starting point. However, this "help" also has a price: it "captures" the thoughts more than one often thinks. By the way, it would be more mistaken to hope to transfer the price range roughly with the basic features of a model that has the same external dimensions. As soon as one reaches the pictorial level, it becomes difficult for the untrained to remain abstract – which actually still belongs to the preliminary design stage. A better approach to planning is therefore, in my opinion, to first collect the rooms and their approximate sizes in list form and then divide the list in the next step: what goes into the ground floor and what into the upper floor. If both are then approximately equal in area, that points towards a straight-walled upper floor (collapsed "town villa") – if the upper floor is about half the size of the ground floor, this step points towards a "one-and-a-half-story" house. This is anticipated/skipped if one starts from a model one likes without having compared it with one's own needs (e.g., the original has no children's bathroom).

Shower in the children's bathroom is 80x100 and in the master bathroom 90x120

As a rough construction measure. This results in about 74 cm shower width in the children's bathroom. With usual construction tolerances, it can quickly become 70 cm. Rather uncomfortable when the child grows into a tall teenager.

Shower in the children's bathroom is 80x100 and in the parents' bathroom 90x120

You don't like advice, do you? See #14

You don't like advice, do you? See #14

Yes, of course, otherwise I wouldn't be here. #14 explains it well enough that it needs to be improved!

Take a look, there at your Maxime has also been interpreted (the entrance and stairs are different, but otherwise you should "recognize" the floor plan).

I have taken some of your suggestions into account. As a result, the staircase has to be rearranged, and a new layout emerges on the upper floor. What do you think about it? PS: The floor plan of the upper floor is almost 1:1 included as a variant in the VBH catalog.