Terminate house construction contract? Wrong advice!?

Yes sorry, that's annoying but not the fault of the [GU]. You are having the house built. You have to inform yourself with the [GU] for longer than an hour. Google would have already helped. Or acquaintances who have already built. The [GU] CAN absolutely not promise a fixed price. At least not for things that are not within his control. In that case, a resale property or a developer would have been the right choice for you. Now is the time for you to deal with it and not to assign blame. Think solution-oriented.

Well, the promises are definitely the general contractor's fault if he doesn't keep them. And realistic advice is the least you can expect. But it's true, in this area costs are often sugarcoated to get you to sign. Be that as it may, it is what it is now and we have to see how to proceed. I am still waiting for a few more offers from civil engineers and then we'll see. Thanks to you all for your help!

Promises are already the fault of the GU

Only if he does not keep written agreements. If you had everything given or agreed in writing, it would look different.

The GU is a contractor and seller. They talk a lot when the day is long. It was simply naive to believe him without reservation.

As a colleague always said: Those who write, remain!

Only if he does not comply with written agreements. If you had everything put in writing or agreed upon, it would look different.

Well, whether it's written or not does not clarify the question of guilt for me, subjectively. The judge would see it differently, I know that. But it's also simply about reasonable behavior and reasonable advice.