How much additional cost according to the structural engineer's calculation?

Hello,

I have to admit that we approached the house construction quite naively.....

We have already signed the detailed planning, now the construction company wants us to waive the special cancellation right in writing - is that legal?

Now to the main question: we signed a fixed price (turnkey), but the site manager said that after the structural engineer’s calculation the price will change again????? I mean, we won’t change anything in the planning and with the bank we have also calculated with the known price - is that normal?? - you’re really buying a pig in a poke!

Best regards

Take a look at your contract: it should state that architectural and structural engineering services are included.

However, based on foundation recommendations according to your [Baugrundgutachten] for the property, it may turn out that the structural calculations for the slab need to be updated. This can lead to additional costs, but not for the structural engineer themselves, rather for the reinforcement in the slab.

Who are you building with?

and with the bank we have also calculated with the price that is known to us

Didn’t you include any buffer in the calculation for the financing?

Take a look at your contract: it should state that architectural and structural engineering services are included.

However, depending on the foundation recommendations based on your soil report for the property, it may turn out that the static calculations for the slab need to be updated. Additional costs can arise from this, but not from the structural engineer themselves, rather from the reinforcement in the slab.

Who are you building with?

We are building with Haus der Handwerker. Yes, the structural engineering service is included in the house price for almost 10,000 euros, but the construction manager said that additional costs will come after the structural calculation—how he already knows that, no idea. We could not suddenly spend 20,000 euros more. We found out the day before yesterday that we also need a sump pit for the basement according to the soil report—we also didn’t expect that because the architect said drainage would be enough...

Best regards

Haven't you included a buffer in the calculation for the financing?

Yes, but now the black tank, which we need according to the soil survey, came up unexpectedly.

regards

Haven't you included a buffer in the calculation for the financing?

and is it normal to have to waive the right of special termination in writing?