Location of city villa or single-family house on 500 m2 plot - rectangular

Wish you continued good nerves and decent construction workers! offtopic to briefly take your mind off things: May I ask you about the dog breed in your profile picture?

Thanks, I can use that.

Sure, that's my dear toy poodle. I don't disfigure him with those typical poodle haircuts, let alone the lion cut.
He was still quite young then, today (or rather a week or two ago) he looks like this:

By the way, your profile picture would be the only reason for my wife to be present in this forum; she had exactly the same one. We are already thinking about looking for such a miniature poodle as soon as the construction is finished. I'm just unsure about the deep black variants; I never got to see the little one live because he died shortly before I met my wife. But in photos, I always find the dog totally spooky because he either has no eyes or these glowing eyes.

Can you go for walks with miniature poodles, I mean, can such a small animal manage 10-15 km?

Small update. The general contractor can’t get the safety certificate from the structural engineer; he claims that I am not under contract with her, but with him, so that it’s unusual.

Back to the topic: Can’t the structural engineer then issue the certificate to the general contractor? Then you get a copy and you’re happy, right?

I’ve lost track of what the actual problem is besides the "botch bags" and the missing coverage of the stones. I have a slight impression that reading about sworn experts in the Fleischerhaus thread gave you some paranoia.

Let’s put it this way, if you had never found this forum, you would have accepted the stones without much questioning and moved in happily, and the house wouldn’t collapse on you. Ignorance is bliss.

Small update. The general contractor can't get the clearance certificate from the structural engineer, claiming that I am not her contractual partner, but his, so this is unusual.
I rather hear from this that they don't want to officially acknowledge the botched work of the masons under threatening liability assumption.

Can you please briefly explain again what you mean by the clearance certificate from the structural engineer? What is it supposed to certify?
She does the planning for the structural engineering and is liable for that, but not for the execution.
If the guys then botch the work, she can't be held responsible. Your site manager/construction supervisor is responsible for that.
My architect did the approval planning and the structural engineering. I never got anything directly from her either, with the same reasoning as yours: I should contact my contractual partner.

Only with the deep black variants am I unsure, I never got to experience the little one live, as he died shortly before I met my wife. But in photos, I always find the dog totally spooky because he either has no eyes or those glowing eyes.

Can you go running with toy poodles, I mean can such a small animal handle 10-15km?

Yes, we also thought that we could have named him Vanta (from Vantablack). Photos are really difficult and usually only possible with excessive lighting, which has other disadvantages.
But the little eyes are actually absolutely adorable.
So with young animals you’re not supposed to go for long walks yet, so I am far from that point. I also think that distance would be rather difficult for the little one later on. Go one size bigger. There are also miniature poodles. They can manage that better when grown and trained. Definitely not right from the start.

Back on topic: Can't the structural engineer then issue the certificate to the general contractor? Then you get a copy and everyone’s happy, right?

I lost track of what exactly the problem is besides the "botch jobs" and the lack of coverage of the stones. I have the slight impression that the Fleischerhaus thread gave you a bit of paranoia.

Well, that’s what we (my expert and I) also think. The structural engineer who planned the static calculations should "authorize" the botched execution for the general contractor, but we do not want to trust the general contractor’s insurance alone. After all, that’s worth nothing after 5 years in case of doubt.
Well, even my expert, although he doesn’t have such big concerns, recommends that I request a confirmation from the structural engineer for the general contractor. He does not want to approve it all by himself, although he probably wouldn’t even be able to represent you.

Can you please briefly explain again what you mean by a certificate of no objection from the structural engineer? What is it supposed to be issued for?
She makes the static planning and is liable for that, but not for the execution.

See above, and if she issued the certificate of no objection for the actual execution now, she would be liable for it. That’s probably why the general contractor is not getting that from her.

As stated above, and if she issued the certificate of harmlessness for the now actual execution, she would be liable for it. That’s why the general contractor probably won’t get it from her either.

I largely agree with Ralf D. from your shopping center ;-) and think you should demand a five-year warranty extension regarding cracks in masonry and plaster, and that’s that. The house will never, ever fall apart because of this small section of a row of overlapping butt joints, but the contractor should be given a symbolic lesson. I consider dismantling unnecessary, and legal proceedings take considerable time (besides, I recommend reading insolvency law beforehand, so it doesn’t become an own goal that would make Pyrrhus turn pale with envy).