Expired fixed price guarantee - additional costs

Deal: I will give feedback at the end whether the agreed price worked out.

Things like founding, additional costs and so on were conducted based on the geotechnical survey carried out before the contract. So I think if you have a good dialogue, you can calculate that quite accurately.

One more question came to my mind. Maybe someone knows about it. Does the process of the price guarantee mean that we receive the new offer and then a new price guarantee applies to it, or is every construction phase now priced anew and the offer passed on to us? How exactly is the additional payment structured?

If we no longer have any fixed price guarantee and have to expect delays, the project is not even remotely calculable? Although we have planned buffers, the budget is not infinitely expandable.

He does not assume that,[..] + 5-10K € we should already plan for.

Suggest to him a supplementary contract with a new fixed price guarantee with +10K €. That is generous at the upper end of his own estimate.

I don't understand that. Were there no utilities in the street yet? New development area?

Well, the request is running in parallel, and then you have to wait your turn...

Well, who parts so easily and happily with such an amount? I believe this is not a club of millionaires here, even if it sometimes seems so with one or the other.

I'll tell you what interesting stories the time here in the forum has produced. From base waterproofing, to drainage, pedestal over missing soil reports with replacement of the foundation ground up to transport and landfill costs, everything has happened multiple times.

and therefore only installed a smaller buffer f

How high is the buffer planned to be? They talk about at least 10% of the fixed price offer... that doesn’t mean every builder considers this. But it has been confirmed by most builders here over the years. The early (information) worm makes the build ;) Either increase financing or call it quits – it’s easier for some than for others, but you can’t really advise on that; everyone has to calculate that for themselves.

Suggest to him a supplementary contract with a new fixed price guarantee with +10K €. That is generous at the upper end of his own estimate.

I will do that, as I said, we have to agree on a middle ground. I admit, I have become panicked due to the current market situation and cannot really assess what surcharge is usual / reasonable. If it is “only” about 10K, I will part ways with them immediately; at 30K it already becomes painful but still within the realm of possibility... if the increase is 30%, then the house project falls apart. As you can see, I am completely blank at the moment. Logically speaking, how can construction costs increase by such drastic amounts within a few months, but thanks to the media I now also paint the devil on the wall.

Well, the request runs in parallel, and then you have to wait until it's your turn... How much buffer is planned? People talk about at least 10% of the fixed price offer... that doesn't mean every builder considers this. But it has been confirmed by most builders here over the years. The early (information) worm makes the build ;) Either increase financing or pull the plug - it's easier for some than for others, but no one can really advise on this, everyone has to calculate it themselves.

If the question about the buffer is directed at me, after purchasing the plot and the originally calculated house construction, we still have 95K left. However, the Bwmusterung (tiles, floor coverings, doors, which we purchase separately from the company in B2B and install as EL) is also included in that. That means we can vary somewhat regarding procurement prices.