Is the neighbor building legally and how do I find out?

Links are forbidden here (yeah, yeah, I know ...) and will soon be removed, so a quick note that your source refers exclusively to Brandenburg. You have to look into the building regulations for NRW, I had mentioned the source in my previous post.

Oops, that must have slipped my mind. My account was also deleted immediately, which is why I’m now reaching out under a “new” account. Mea culpa…

Yes, the source refers to Brandenburg, you are right. However, the corresponding rules apply with the same wording in NRW as well. In the meantime, I have also found other sources for NRW.

I looked at the development plan again; garages are only allowed outside the building lines as an exception – that was probably done here.

I think it will go like this: the house on the plan is approval-worthy, but the outdoor facilities and terraces are not. However, he does not have to get those approved and will simply build them or has already built them. What still surprises me a bit is why the building authority allows this: the property is so small that the only place for a terrace (except for the driveway to the garage) is the 3m strip towards us. According to the building plan, several floor-to-ceiling doors also lead there. It is obvious that a terrace is supposed to be there, which actually shouldn’t be allowed. Is there a single-family house without a terrace?

With your help here and research, it becomes increasingly clear to me that what was submitted for approval is probably barely approval-worthy with exceptions.
That I now have to ask the neighbor 10 times for every piece of information despite decades of good neighborly relations, and he simply does not want to tell me what he intends – mind you, information that, according to the building authority, is my right – has simply shocked me a lot and is frustrating.

But now that's off topic and logic at its finest, so please excuse me!

All around the house you could stand with a coffee or a glass of sparkling wine.

Does it then count as a terrace because of the ground (paving and not, for example, grass)?

I could poop anywhere, so the toilet is not „everywhere“

It is obvious that a terrace is supposed to go here, which actually should not be allowed. Is there a single-family house without a terrace?

When it comes to a single-family house or residential construction, an exit/terrace is always assumed. The terrace itself is also part of the floor area ratio. It is also drawn in and approved in the building application.

Oops, that must have slipped past me. My account was also deleted immediately, that's why I'm now logging in under a "new" account. Mea culpa…

I'm curious how much longer we'll see you here. You seem to have let a bit more slip through.

In the case of a single-family house or apartment construction, one always assumes an exit/terrace. The terrace itself also belongs to the floor area ratio. It is also drawn in and approved in the building application.

On the plans I have been shown, there was nowhere a terrace drawn. Not even the existing one of the existing house. Can I view these building application plans somewhere? I have already been to the building authority, but they did not show them to me.

I'm curious how much longer we'll see you here. Seems like you slipped up a bit more.

Oh, I assumed that not I as a person but only the account would be suspended. I have learned from my mistake, which definitely will not happen again, and hereby apologize to all users and the forum administrators. I would gladly like to continue discussing this topic with the users here and am very grateful for the help so far.