Floor plan planning shortly before submitting the building application

And I agree with them. Period.

I find that very strict. Do you know the statics of the house that well? We are still in the shell construction phase, right? Installing a new lintel is not an impossibility, is it?

We are still in the shell construction phase, right? Installing a new lintel is not an impossible thing, is it?

We are in the phase "the roof truss is already erected," and it was not about objective impossibility, but about a lack of economic feasibility. It definitely costs excessively to undertake this effort. For what anyway: for a possible additional width of 25 instead of 12 cm? And then comes the next amateur complaint: oh, the 126 cm wide balcony door then needs a third hinge, oh then tilt-and-turn is not possible, no one told me that ;-(

Well, elephant, that's how customer friendliness works. I find it somewhat disturbing what always DOESN'T work on this construction. It's worse than in the GDR times. So three people just have to invest a bit of brainpower, advise the customer exactly, and one saws the crap back in.

In some places I have the feeling that one can also exaggerate layman naivety.

I can tell you how to sell cherries, chanterelles, or other delicacies. But structural things are simply not my world. Sorry, but I didn’t think to ask whether you are allowed to mount something in a KS wall and not in a drywall, or vice versa….. instead, one could have asked the builder if he is aware that a KS wall is not used for installations and how he envisions solving his furniture and shelves. Maybe not legally enforceable but customer-oriented it would have been. But let’s not deepen this topic; here I accept the additional costs without grumbling even though I am annoyed.

This window will probably also go down in the history books of this forum forever, in case someone wants a concrete example of the quality difference between one’s own and a general contractor architect.

The planning quality that the customer can expect is legally the same for both. So they have to be measured accordingly and possibly stand responsible for faulty planning. I find it inconsistent to depict on one hand that the general contractor architect is generally worse, but then again to protect him across the board by saying it is not a planning or execution error.

At the latest in the third instance he will come across a judge who himself or through experts brings sufficient expertise to counter that execution plans always show raw construction dimensions unless explicitly stated otherwise.

One must not be mistaken here. It is not about convincing a judge what usually is in execution plans and what is not. It is much more about what the provider should have done to explain this to the customer. If one has to explain it to a judge in the third instance first by an expert, why should it then be simply expected from the building layman at contract conclusion?

In the construction service description, the drawings were part of the contract documents, and the lawyer’s legal opinion can only be derived from the text part.

Only the floor plans were part of the contract, not the execution plan.

Regarding the window:
Again, as a layman, I do not understand the following. A widening of the door is a huge static problem and hardly economically solvable, but adding a window now afterwards, which was not there before, is no problem? You told me, a window is out of the question at reasonable cost (as you actually say about all points).

If a niche is built into a single-brick-thick masonry wall, either nothing can be built above it, or nothing masonry can be built above it, or a lintel must be placed before further masonry can continue above. Of course, the wall does not have to be demolished; it can remain up to the underside of the mirrored cabinet. Above the mirrored cabinet, drywall construction is then continued.

As for the judge, I meant: by the third one at the latest, it will be questioned whether the lawyer’s assumption corresponds to reality; and if necessary, a surveyor will confirm that finished dimensions in structural drawings are at least exotic.

The forgotten window now naturally costs multiple times as much as if it had been planned from the start – that’s why I’m saying friend price.

I have a maybe quite good idea. The glass surface of the fixed window element is about 10 cm wider than that of the terrace doors. If it is still possible to build a parapet wall, it would also be conceivable to switch to a fixed element in the bedroom to maximize the light incidence. I think it is completely sufficient to go to the roof terrace through the utility room and the bathroom. Alternatively, I will ask to what extent there are door elements that manage with a narrower glass frame in favor of more glass surface. Perhaps aluminum windows are also an option that makes this possible.