Additional construction costs when building a house with a developer

For the bathroom, one would need the exact measurements again to see if the sink setup works or if the person standing there would get the door in their back when someone enters.

It’s not directly measured, but can be derived.
It’s not more than 40cm. At the right sink it’s tight.
But that is basically unusable there in the corner anyway. Simply not well thought out.

No. It is wrong to act as if everything is great just because one thinks it is too late. First of all, it is not too late yet, and secondly, not everything is great at all. Those seeking self-affirmation can also ask mommy. Are you trying to tell me that the entrance situation in the children's rooms is well solved? That the strange little pantry makes sense when you have a huge basement? That the dressing room is not much too small to be usable? That the bathroom, despite its sufficient size, is not poorly designed? That in a house that is actually not small, there are narrow hallways and corners everywhere? If he is sure, he does not care. Yes, you can live in the house as currently planned, no question. But you will often find yourself shaking your head and wondering what got into you back then.