Reading a drawing - height information?

And, regarding the kitchen windows, the plan explicitly states ... "countertop runs into the window" ... at the latest, this should have been clarified, and at the latest, the kitchen studio should have noticed this as well.

Right. I could still come to terms with that. But the kitchen is supposed to be 91 cm high. I think I need to make some calls tomorrow.

Yes, related to the raw construction measurement it would be too low, related to the finished measurement too high.. 1.06 m working height would only be reasonable if both of you reach 2 m.

How are the +1.06 to be understood here? For the living spaces it says +1.00.

As 1.00 (+/- tolerance!) or 1.06 (+/- tolerance!) meters above 0.00 – but that is exactly where the snag lies: whether 0.00 means OKRFB or top edge of the finished floor. In case of doubt it does mean top edge of the finished floor, but: it assumes that the difference between raw and finished floor in reality matches the plan – and that’s exactly where the naivety lies, because neither bricklayers, nor screed layers, nor tilers are goldsmiths. For good reason people say "Pi mal Daumen" (roughly) and not "Pi mal Engelshaar" (precisely).

Regardless, this can hardly be the execution plan for the shell construction. I always know the specifications in relation to the shell. So raw floor, raw ceiling, etc. Plaster can still be removed.

In my (execution) plans, it was indicated at the top right what the heights referred to. Therefore, take a look at the correct plans to see what is noted there.