Floor plan design for the renovation of a terraced house from the 70s

Thank you for the open criticism (seriously meant, no irony).

That there are worlds of difference between us in terms of planning competence interests no one and is irrelevant. More important is that you take my warning

Stop (better yesterday than today) planning this renovation without an architect.

seriously. I can gladly connect you with the needed professional. But as an amateur planner, you will not only make unsatisfactory progress, but you will also pay a lot of (avoidable!) tuition fees during implementation. Apparently (and hopefully the illustrations are at least good enough for my impression to correspond to the truth) a fully cellar basement bungalow was built into a (presumably §34 village core) building gap filling the width of the plot. If I remember your descriptions correctly, this was later extended upwards. It seems that a staircase was awkwardly squeezed into the entrance area because the upstairs residents would have had to go through the ground floor living unit to continue the staircase from the laundry cellar. Even this staircase was apparently too much bother for you to draw, so you only depicted the shared entrance as a "black box." Unfortunately, you did not include any reference lines in your redrawing that would have greatly facilitated the comparison between originals and redrawings. So overall, the impression / "initial suspicion" remains that several essential details may have been omitted.

It is probably easier and closer to the truth if you just mark the changes in the original plan.

... or erase invalid illustrations in Paint.

Yes, I have actually saved myself some work. But not because I didn’t feel like it or found it too tedious. It simply wasn’t clear to me that even details outside the "own four walls" are of interest to people with expertise (i.e., you). The assumption was that we couldn’t change these circumstances anyway.

That, for example, orientation lines are necessary was also not clear to me. Since the walls are identical except for the merging of the two upper children's rooms as well as the widening of the former bedroom and the extension of the hallway, and these changes are drawn in, I assumed that sufficient orientation options were given.

But I take away that this is not enough. And I also take away that an expert is needed who plans this exactly at the end before it goes into implementation. Thanks again for that.

I would still like to take the opportunity, should I come up with further variants, to post them here and would continue to appreciate feedback. Before implementation, however, I will have it evaluated and drawn accordingly. Because yes, you are right, I would pay unnecessary tuition fees otherwise. I will gladly come back to the mediation offer if needed.

To briefly touch on the rest of your contribution:
The building was constructed during the development of a new settlement. Not afterwards in a building gap.

Unfortunately, I can no longer edit my previous post - so here is the correction: - The former bedroom has currently not (!) been widened. I confused this with one of my numerous floor plan variants where I experimented with the room.