Wastewater pipe concreted in the floor slab at the wrong location

Surely the BU could also be willing to compromise, but I think you've lost that chance?!

I haven't talked with the BU any more than agreeing on an appointment to clarify things, which he didn't show up for. I haven't even been able to present my proposal to him yet. I only know from the site manager that he is currently behaving somewhat strangely. That's it.

I think your error in reasoning is that you are entitled to the difference in cost between a 50mm pipe and breaking up the foundation. You are entitled to the makeshift solution and maybe also the planned solution.

I don't have any error in reasoning yet. I remind you: I just wanted to know what breaking up, connecting the pipe underneath, and sealing it again "could" cost, so that if I manage to get the BU to an appointment, I would have a basis for discussion. And in this discussion, I "could" argue that the service trench price will most likely be somewhere in the middle and could be a good compromise both for him and for me. But instead, I get page after page of attempts to lecture me...

Although I am not a lawyer, the most important thing is that the function is guaranteed!

Correct. And that will be the case (the installer will take care of it). Only if the BU wants to maintain a good reputation with me (so far everything has been done and implemented to my full satisfaction, except for this one mishap), it would be great if he showed a little leniency.

That is another matter, but it cannot be forced either.

No, a gesture of goodwill cannot be forced. I don't want that either.

I just wanted a confirmation of the estimate for the cost of opening up the slab. What I do with that, and where it leads me: yes, one can point it out and briefly question it. I find that okay and also reasonable. What I do with it again: my problem... Instead, there are now pages and pages of attempts to lecture me...

Regardless of how this continues and whether it is right or wrong, or simply stupid: is it so difficult to answer a relatively simple question? If necessary, a "you absolutely cannot estimate that, not even roughly" would suffice. But the "beating around the bush" honestly gets on my nerves a little.

But instead I get page after page of attempts at lecturing ...

And what could be the reason for that?

But alright, you want to hear a price? Your 1000€ is about right! That's what I'll say! And what good does that do you?
You won't get around paying someone to get a usable statement about the costs!

And what if the sewage pipes were installed too deep? Our site manager said that is our problem

I’m keeping my fingers crossed that we never enter into a contract with each other (by accident). Basically, your arguments are largely correct. Objectively considered. But there is also a component beyond that, then it becomes narrow-minded. And it is precisely this narrow-mindedness that may stand in your way during the further construction phase, because it will quite certainly not be the only disruption accompanying your construction project.

One thing is also relatively certain: the dear people on the construction site often know each other quite well and the drama will likely spread (in no time). And that will not be an advantage, at least not in the final analysis.

If he has probably already made a loss and then offers a proven and good solution for the defect, then everything is fine. Why wield the club here and grumble around like a Neanderthal?

I can only recommend that you read accessible comments on § 635 Baugesetzbuch and try to understand that it is not you who can dictate to the contractor how to remedy the defect, but that the contractor alone has the right of choice. Besides, it will get tight for you if the subsequent performance is sufficient to fulfill the original purpose, but you still want to enforce a kind of "... You have to pay because it is not as stated in the drawing ...".

I would be pleased if I may read the outcome of such a dispute here.

the OP has long since been living in the house, that's how old the thread is...

So can you help me now?

During the appointment for the domestic water connection, it was found that the wastewater pipes are 20 cm too deep. Of course, a lifting system was immediately offered.
The site manager's reaction was, that's our problem.
In March we had to resubmit a building application because the foundation slab is 18 cm higher than submitted. We don't know what to do anymore.
Allegedly, we should have measured on the day it was laid and poured.