Top edge of the finished floor higher than the allowed 0.30 - problems?

Thanks for the hint, . But of course, this all relies on anticipating the "worst case," namely in the event that someone wants to come down on us because of the 6cm excess, whether neighbor, building authority, or municipality? Is there anything like a "gray area" here that still falls within the tolerance range? We’re not exceeding the specified 0.3m by 20cm or more. And a silly question, but does "0.3" mean "0.30" or does it also include "0.34"?

The architect should be able to assess that best. Is he from "on site" and does he know the folks from the building authority? Then I would trust his judgment. If you have concluded a contract for work (and not a service contract) with him, then he even owes you a design that can be approved ... and this applies even if the building permit were subsequently revoked. But that is extremely rare.

The architect is commissioned by the general contractor and not directly by [vor Ort], but at least from the same region and regularly deals with the responsible building authority. Could the building authority actually revoke the permit if they find that they have overlooked something or is it - once issued - now legally binding and final?

Build exactly as it is stated in the building permit.

Why do you want to deviate from a building permit? Then your architect must apply for the deviation at the building authority. Otherwise, you will later have the problem that the building authority says, “You did not build as approved!!!”.

That's how it is.

What usually "overrules" what – building permit > development plan or vice versa?

The building permit is an administrative act that remains valid in principle even if it was granted incorrectly.

Build exactly as it is stated in the permit (which hopefully refers to clear information about NN). After any possible noticing of the architect’s error, it will neither be revoked nor will the building be demolished if the OFFFB EG deviates by six cm (!) The reference height should primarily be read as such. That means the actual top edge height of your floor doesn’t concern anyone here. If your eaves and ridge heights remain within the limits from the perspective of all possible interpretations, I see no problem here.

Our general contractor said at the meeting last week, "lower than approved is always allowed."

The laws of physics certainly outweigh the opinion of the general contractor. Water never flows uphill. If the finished heights of the actual street and the misread architect’s plan do not cause drainage problems, then everything is fine.

Thank you for your assessment. The finished floor height is specified with an exact üNN. The whole thing was measured from a GPS-surveyed channel ceiling. So that should all fit. However, we would then be about the mentioned 6cm over the allowed "0.3" (if 0.3 means 0.30 and not 0.34 or...). In fact, we would then be a bit higher from the finished street and that reference point...

Build exactly as it says in the approval (which hopefully calls for unambiguous information about ü. NN.)

That is what we would do with the current planning and the information given to the general contractor for the civil engineers.

The laws of physics certainly take precedence over the opinion of the GC. Water never flows uphill. If the finished heights of the actual street and misread architect planning do not cause you any drainage problems, then everything is fine.

From a drainage perspective, the building permit would rather be to our advantage.

The question is, what do we do now and what applies here? The maximum permitted height according to the development plan or the incorrect height confirmed by the building authority? What would you do in our case? And does it even get noticed, or what is the worst that can happen to us?

The height approved by the building authority applies. This height is not wrong, but deviates from the plan. The building authority has the competence to grant deviating approvals and you have received one like that. Whether it was a mistake or a silent concession - no one knows. I wouldn’t put any more energy into these thoughts. After all, the approval is exactly as you need it. So you build as approved and that is legally secure.