Floor plan design single-family house city villa with granny flat KFW40+

Quickly again about the WC discussion on the ground floor: my suggestion was to swap the kitchen and the sofa corner. And if you do that, you could swap the WC and the storage room to make the storage room into a pantry. That wouldn’t change the WC/entrance situation, since it doesn’t matter whether the WC door on the ground floor is moved by 1 meter or not. Whether you then slightly change the layout to include a shower is a matter of taste ;)

I would find swapping the kitchen and sofa corner advantageous, since the living area is then less narrow and connects directly to the terrace and the granny flat (for a possible breakthrough). The kitchen would also be better separated in the open plan area, and by combining the pantry with the storage room you save space. The currently drawn wall stub could be kept to partly separate kitchen/dining from living. This wall stub could also be designed more openly (as a shelf, half-height wall or a combination of those). And access from the kitchen to the terrace can be made on the south side (or you can just skip it, since the 3-meter walk past the dining table is not a big deal). In addition, you can then install two large lift-slide doors on the west side (one at the dining table, one at the living area) to make the transition between inside/outside even more open and spacious.

The plot is really great, and maybe you can even shift the house slightly north to make the south side more open.

As a layman, it is difficult to imagine the size of the rooms without dimensions.

Well: 3.3 sqm with 5 outlets. You can already see that there is no free wall, for example to hang a picture, place a dresser, a floor lamp... I am not in favor of hallways, but if they are necessary, then they should also be comfortable. Just enter attic hallway on Pinterest. Every resident of the house benefits from hallways. Remember with the utility room on the upper floor that ironing laundry also lies around sometimes, hand laundry has to be dried.

Discretion was the keyword (parcel courier, guests at the front door etc..), although none of us suffers from stomach-intestinal problems…

He is probably right about that. You don’t need to have stomach-intestinal problems, you can get them. I remind you of the kitchen: you will change. You get older. And even if you have no ailments, sometimes you won’t feel so well. But then you have a) one upstairs, b) you don’t sit on the toilet 24/7 to then also have to deal with a postal worker. And if so, it doesn’t matter anyway: he doesn’t know what will happen behind the wall in the next 10 seconds. Because of such an unpleasant situation that might occur once in 5 years, you give up a WC room at the entrance that could make you happy several times a day. You also don’t put a toilet in the south because the room heats up too much. ;) I already think you can still conjure something out of it. It will be fine.

... you are renouncing a toilet room at the entrance, ...

You have said that several times now, and I don't understand it: there is a toilet in the entrance hallway on the ground floor, isn't there?!

You have already said that several times, and I don’t understand it: there is a WC in the entrance hallway on the ground floor!?!!

That’s correct. My concern is fundamentally about the argumentation of those who don’t find it appropriate. I only inquired about that and expanded it with other arguments in favor, or I find the architects' arguments incomprehensible. Furthermore, there are dogs in the household, which one wants to accommodate fairly. I find your exchange proposal very good and feasible.

I have only skimmed through the posts now, but I don't think this has been mentioned yet:

I would not have the bedroom of the granny flat adjacent to the kitchen. Especially not if the sink will also be on the shared wall.

In our previous apartment, our bedroom was also directly next to the neighbor's kitchen, and the coffee machine regularly woke me up at 5:38. When they had visitors in the evening and we wanted to sleep, we had to listen to the kitchen being cleaned and tidied up well past midnight.

That's fine. The occupant of the [Einliegerwohnung] is frugal! :)