Unpredictability of construction costs - Will the project fail because of it?

It would tempt me again, especially since you don’t need a new basement height, but from (also romantic) experience I know that such on-off relationships rarely lead to anything good.

Maybe it helps to say that the monthly and total budget are very tight. In addition, despite repeated reminders, he did not allow himself to commission a soil survey (a no-go on a slope). Despite the turnkey offer, there are too many contingent items in the offer which haven’t even been included in the costs. So it can actually only fail with him.

So the general contractor ordered ceilings for the construction project even though supposedly no contract was in place? This is getting wilder and wilder... :mad::(

Right? In the end, though, he kindly said he could "cancel" the ceiling.

Yes, that would also ring alarm bells for me if in doubt. ... how is your separation from the GU secured? I would probably have this process examined by a lawyer by now to ensure that your separation from the GU remains valid.

I told him that we would get in touch next week. In the meantime, I will take care of finding a lawyer.

If I understood correctly, one of the two semi-detached houses is now ready for occupancy or has already been occupied. :)

That is a misunderstanding :) The lady with the butcher's house did not write here at all :) But the gentleman who dropped out at the first terraced house in Stuttgart and now has a new one on hand. Nothing is finished yet. I don’t know if they have started.

The general contractor probably noticed that too many are dropping out and sees his chances slipping away... Serves him right anyway

I told him that we would get in touch next week. In the meantime, I will take care of finding a lawyer.

He will probably say: "After withdrawal, please do not do anything that could be interpreted as acceptance > > completely stop communication regarding the old contract." I would now (AFTER the lawyer consultation!) boldly make a counteroffer (on your letterhead, but text checked by the lawyer): With reference to your offer from ... we hereby offer, without obligation and with an acceptance deadline until ..., to build the previously planned house with a basement increased by 25 cm at a total price of [previous price plus the five thousand for the higher basement]; the price refers to execution until ... and decreases by x for every started month of delay; with order confirmation, a completion guarantee must be provided. We retain the right to access the property during the entire construction period and will carry out unannounced inspections of the execution quality.