Floor plan design single-family house approx. 250 sqm with granny flat

Not for me anymore either. There are now 8 attachments instead of 4.

Presumably someone fixed that, so my post disappeared at the same time.

I still don't know what I could have done wrong there. I already used the "Attach files" function normally on the first try. On my husband's phone (not logged in here), the attachments could be opened immediately as well. I can only imagine that the files were too large (the original image quality was certainly a good deal higher). But it doesn't matter....

on the phone (not logged in here) the attachments could also be opened immediately.

Yes, they could also be opened. But attachments that need to be opened first are not welcome, as you have to open new windows.

Nobody expects that here. No one expects at all that you will implement anything. You are not building a house for any of the respondents. You are building your house the way you like and want it.

But maybe you should take another look at everything, focusing on your own answers. Psychologically trained people cautiously tell you that the granny flat might be a bit narrow and you come back with a counter-question "really?" and compare it with an old apartment. I mean: the granny flat is no more than 4! Four meters wide.

A 4-meter-wide room is not a problem in itself – I hope we agree that 4m is not too narrow when looking at the individual room? I did not compare the whole apartment with an old apartment but only the size of the bathroom. I also never said that we will not try to get more space, but anyway, I think we are talking past each other.

Also here a contradiction and a comparison. And yes: it is legitimate to compare.

Exactly. If you approve everything and consider it as already had and sufficient, what else is there to explain? Then there is no part 2 from me, your argument does not allow it, and to be able to answer more precisely, dimensions are needed, which are not coming.

I only tried to explain personal priorities. For example, a large bedroom (e.g., with space for a sofa as a cat’s sleeping place or a child’s bed and a nice antique dresser) is more important to me than a large bathroom. Neither my husband nor I ever use a bathtub, but for a child it might be nice. Therefore, we would accept treating the bathroom somewhat "neglectfully" in terms of space allocation but of course do not want to create problematic bottlenecks. Hence on the one hand the question about concrete problem areas but also the explanation of priorities.

I also save myself the time-consuming re-measuring via scaling.

Where are dimensions missing everywhere? I will provide them later but probably not before tomorrow evening. As I said, I prepared a vectorized PDF where you can zoom in nicely and see measurements of windows and some other things well. I now need to add larger dimensions first, but the program only runs on my husband’s Windows PC, and he was working on the questionable PC until just now.

You say I let it be known that I "don’t want to change much anymore." I can’t remember saying anything like that, but okay.

Yes, they could also be opened. But attachments that first have to be opened are not welcome, as you have to open new windows.

Now we are approaching the core of the problem – although nothing is stated about this in the rules. But then the files were probably just too large and that’s why the preview didn’t work. I will pay attention to this in the future, it will probably be trial and error which size can be uploaded here.

...brings enough heat to be able to extend the "terrace season" or if it would just be a "mood fire." However, we have a consultation appointment with a stove builder coming up soon.

Mmh, is the stove builder objective about that? I'm wondering if that closed front towards the garden is worth it to me. I think it's quite a big sacrifice.

Because the door should at least not open inwards due to the very limited space

10 sqm is not so cramped that there would be no room for a door – even opening inwards. You can safely do that.

I can't really understand that right now. Maybe a misunderstanding? I have marked the parking space for the granny flat in the site plan. The path to the granny flat entrance would then run along the neighbor’s fence.

What you find too tight above, you seem too lax about here, in my opinion. But without the scaled site plan, hard to judge. To me, it strongly looks like Mom and her guests would constantly walk right past your terrace. Five meters is virtually nothing in a garden.

Site plan in 2D? Do you mean a satellite image?

A site plan places the house, paths, and outbuildings to scale on the plot of land. All measurements (e.g. distances, boundary lengths, possibly elevation profile) are drawn in as well. That is actually the first thing to do to see if the space is even sufficient.
Your last 3D picture looks like the program already has all the info. The 2D one with measurements would really help.

Oh, okay. That is indeed already included in the program, coming tomorrow evening. Here again is the potential parking space (dimensions should roughly fit) with some recognizable measurements from a PDF that I have on hand right now. It was visible in one of the originally uploaded pictures but apparently got lost due to resizing.