Request for advice

I read a lot in this forum, most of the time the situation is exactly the other way around. The client has agreed on something that was not adhered to and is asking for advice here. In 99% of cases, the question comes up: "Is it documented in writing?... if not, then you probably have to accept it as it is.."

Here the architect has verbally communicated something and the written side says something else... but there is still a valid contract presented...?

In both cases, there is a valid contract.
Proving this, however, is the problem when one of the two suddenly suffers from memory loss (or simply lies).
In the first case, the problem lies with the questioner / client.
In the second case, the problem lies with the architect.

In both cases, a valid contract exists. However, proving this is the problem if one of the two suddenly suffers from memory loss (or simply lies). In the first case, the problem lies with the questioner / client. In the second case, the problem lies with the architect.

If I read the previous answers, apparently not in this case...

If I read the previous answers in this case apparently not...

because here both the architect and the client believe that there was a verbal agreement. First of all, good for the architect.

Yes, but as I said, I assumed that the heating engineers would do it for the same or a similar price and not for three times the amount.

As mentioned, you have the written tender where there was a service from the screed layer... and a written tender from the heating installer, where it was not included... now the architect simply changed it verbally without informing you about the huge costs... and now you are supposed to pay for it... I would be pissed off too.

Of course, one should basically try to reach an amicable agreement. But since the architect immediately comes with "then sue me," I would ask him where you accepted the change. You have no knowledge that it was changed... period.

They do such work every day and constantly try to rip off clients (who are almost always laypeople). After my house construction, I am just as disappointed with German craftsmanship... the only thing they are really good at: excuses...

Called the heating engineer on the same day and told him from the start that I am not willing to pay three times the amount, offered him €2500 which would still be €1000 more than the screed layer, he declined, then I told him to clarify it with the architect, now I am waiting, something has to come eventually and if it is a reminder, I will go to the lawyer.