House on parents' property - inheritance problems?

Or stay as you are. You obviously have enough money overall, so you don't necessarily have to risk the relationship with your parents. The "cut the apron strings" can also quickly lead to losing contact with your parents. And before you know it, they die without being able to say goodbye. The life wisdoms can be read more and more often. All nonsense, because every life including family circumstances is absolutely individual. Live as you consider good and right. The end.

Or stay the way you are. You obviously have enough money overall, so there is no need to risk the relationship with your parents. The "detach yourself" thing can also quickly lead to having no contact with your parents anymore. And before you know it, they die without being able to say goodbye.

You can read life wisdoms more and more often. All nonsense, because every life including family relationships is absolutely individual. Live the way you find good and right. Period.

And because he might not be able to say goodbye then, should he forgo life until then? He will most likely be over 50 by then! Parents are important, yes, but there are more important things, e.g. yourself and your own family. If I always carry my parents on a monstrance in front of me, I come up short myself and accordingly will not find a partner. A process of detachment is an essential part of growing up. If you wait for nature to take care of it, nowadays you are often old and gray yourself. If he really found the way he lives right and good, he would not be spreading out his life in a house-building forum...

Still his own decision. Not yours, not other members'. No one has the right to interfere.

to have no contact with the parents anymore. And before you know it, they die without being able to say goodbye.

When the parents oppress you like that, it's often the only way to lead your own life.

Still his own decision. Not yours, not other members'. No one has the right to interfere.

He asked! Missed it?

Still his own decision.

Absolutely right. But then he shouldn’t come here and whine so naively and childishly. He’s getting advice here, we’re not his therapists. Professionals should take care of that. Could maybe do harm. His decision!

So if I assume that the neighbor's garage defines the rear building boundary, meaning that the "contiguously developed district" ends there,

... I would call that a bold hypothesis (using a non-habitable building to anchor the inner area boundary with regard to residential buildings). Unfortunately, you have managed to be regarded as a troll by the member qualified to provide expert opinions on this matter.

And then there is also the fact that he does not trust external consultants because they have always advised him incorrectly or incompletely in the past.

I had already hinted gently that this could be causally related to having under-informed the consultants. And apparently, it is hereditary.