Influence of outbuildings on boundary construction

We were actually told that the boundary distance does not affect us with these outbuildings.

Uh… that can’t be what this…

It’s right up there. Measured 8.75.

… means when I ask what the "actually" refers to. Are you uncomfortable with follow-up questions? Do you want help? Actually, yes, right?

Are follow-up questions uncomfortable for you? Do you want to be helped? Actually, right?

Nope. I just don’t understand the hair-splitting – actually means nothing special in this context. That’s how it was actually told to us, but it seems different now :) What does your “actually yes” mean? ;) Yes, that was the point of the post.

What do you mean by your "actually already"? ;)

Well, at least you understood that ;)

We went to the building authority today to present our plans and to get a rough estimate of whether what we have planned would be feasible. Now, the lady from the building authority said that the shed built by our neighbors on the property boundary (about 10 meters) makes it necessary for us to keep a distance of 6 meters instead of 3 meters. However, she is going to check that again. Honestly, we are (especially due to the very narrow width of the property itself - 13.90 meters) somewhat shocked and also surprised that none of the two architects we have had so far told us this.

Wasn't it the case "recently" - but already about two years ago - that there was talk about having to even build an extension onto the neighboring semi-detached house and likewise at the stables behind the houses, only lower there?

House number 83 is our .

Well, at least you understood that ;)

It wasn’t “recently” – but already about two years ago – wasn’t there talk of having to even build onto the neighboring semi-detached house and similarly with the stables behind the houses, only then lower?

Exactly!
We are building there too. But the neighbors, just like us, also have a shed/stable – about three meters from the current house – right on the boundary. We would demolish ours and build our house three meters from the boundary (the previous house had only 35 m2 of floor area, so we would be building a larger footprint).
According to the lady from the building authority, that’s not possible with a 3-meter distance because of this shed/stable, but only with 6 meters or 5 meters without windows on the side. That would then reduce the building width at this point to 4.90 or 3.90 respectively.

I'm still confused, didn't you just basically say "yes, we're building on it" and then in the same sentence basically a "we're planning a 3m distance"? Doesn't that contradict itself? Or are you partly building on it (and on the border) and partly deeper (with 3m or now possibly 6m distance)? With 6m distance it sounds like it might still be possible to have a bay window or something projecting into the area, but probably not a normally wide house. (But it also sounds like a good architect might still be able to work something out? Without knowing the entire property now)

Otherwise, how tall is the shed? (That also partly influences whether this "is under 9m long, therefore doesn't trigger extra setback areas" rule applies or not) and is there a development plan that possibly regulates something about this?

But you already notice, yes, basically it can be that edge construction triggers extra setback areas, but it can also be that it doesn't. Your case seems quite special in terms of the setup and as a layman I wouldn't want to make an assessment there. I would probably ask the architect again why they came to the assessment that 3m is enough and possibly get another expert opinion (or maybe the building authority will come to the conclusion after review that "3m distance is correct")