Financing with a 35-year fixed interest rate

It was an error in the email... the 35-year offer does include a usual special repayment option of 5% of the loan amount. Unfortunately, this entire financing offer at this comparatively low interest rate is only valid now in October. That will be too tight timewise for us.

We are therefore slowly tending more towards 20 years. In my other thread it turned out that there will probably be quite a bit of additional construction (incidental) costs, so we will get new offers. Our loan-to-value ratio will probably be around 90-95%. With our current joint net salary of ~4,200 EUR, we had set a monthly installment limit of 1,100 EUR... it could be tight.

Are you building to KfW standard? Then you can still obtain parts of the loan through the KfW, which always allows for special repayments. You can then calmly work through this mountain with all kinds of cash flows or structure the follow-up loan accordingly. This assumes that their terms are worthwhile.

obtain the loan through KfW, which always allows special repayments.

Sorry for the off-topic, but when I just read that... I also have a KFW loan of 50,000,- and to my knowledge, special repayments are not possible. Which I find very unfortunate...

Sorry for the OT, but when I read that... I also have a KFW loan of 50,000,- and to my knowledge, no special repayments are possible. Which I find very unfortunate...

Not at all? We can make special repayments at any time. But we also have the old contracts. Is it different with the new ones?

Contract from Sept. 2015 .... But I am pretty sure that there is no [Sondertilgung] included.

The KFW 124 over 50k definitely does not have a prepayment option