Floor plans of a single-family house with a granny flat, please tips and feedback

Yes. In the basement there is an apartment and the ground floor and upper floor could (if necessary) be divided into two units.

And what don’t you like about it? Many things are better there than in your floor plan.

You only like the plans better because they don’t come from a layperson and look neat, with measurements, just as you want! The following is negative: Basement: Bathroom in the middle, without window ventilation. Rooms like a corridor, unsuitable for 1-2 office desks. Room concept doesn't consider an external staircase. Ground floor: hardly anything to complain about, it is partly identical to ours, except for the extension and the guest/office room. Upper floor: loss of space due to the mezzanine and a hallway that is far too small. No possibility for storage in the hallway + no space for attic stairs. Door problem on the right. Also planned with a second gable that is supposed to be omitted for cost reasons.

Yes. There is an apartment in the basement and the ground floor and upper floor could (if necessary) be separated into two units.

That was also exactly how it was optionally planned. In the attached plans it was Weberhaus who implemented it according to our ideas.
At that time the middle extension was not yet an issue because the plans were based on the corner plot. With the middle extension it would look different again.