Is financing feasible? Single-family house 155 sqm

To mark a positive example. We are now in the second year and have used the special repayment in full twice. And if it were allowed, we would have repaid even more. It depends on the attitude. I would rather make a special repayment than buy a new car even though the old one is not broken yet. I similarly estimate the OP. It is similar with my sister and also some acquaintances. I am really surprised that so many people apparently do not take advantage of the special repayments. In the circle of friends and family the attitude is different. But it probably also depends on what kind of values your parents have passed on to you.

Money that is not there cannot be paid off early - no matter how one was raised. And whether in the end as much remains as calculated in advance can only be seen, as Tassimat also wrote, when the house is built and fully furnished. I wouldn’t bet on it either now.

But there we are at the point... When I look at various little houses in the new development area, I just wonder if it has to be that there are already new garden furniture as soon as they move in, or the outdoor facilities are already completely done? Does the house really have to be fully furnished right away?

That develops gradually... But here we are again at the point of how one was raised or not. 80% of new builds are already perfectly furnished after construction. Does it have to be?

Do you really think you will be the first builder who experiences no surprises regarding costs during construction?
It's not just about furnishings or a carport... But we won't reopen the discussion about your construction or incidental construction costs now