House on parents' property - inheritance problems?

That would be perfectly fine. Experience shows that families think much more long-term than, for example, politics. So why punish people who can handle money by giving it to those who cannot?

Strangely enough, it's always the people with these fascinating views who end up standing there unable to believe that their construct only led them into nonsense instead of saving anything. I could write a book about that.

Why then punish people who can handle money by giving it to those who cannot handle it?

Because there are incredibly many people who can handle money but still barely have enough to live on because they have the wrong job. For example, ask a single mother working as a geriatric nurse with two children how she manages to get by.

Well, now we are at the fundamental system question. And then it should also be allowed to ask why single parents are single parents. Of course, it is an outrage that professions close to people are relatively poorly paid. But even there, there is a market with supply and demand...

But that would be completely fine. Experience shows that families think much more long-term than, for example, politics. So why punish people who can handle money by giving it to those who cannot?

Now finally stop this annoying whining! It’s just maddening. Smooth out the situation, but you will have to spend money doing that. Or just leave it as it is. If you’re lucky, the dear father will pass away without becoming a care case first, then you can start whining here again that you, the oh-so-poor-and-afflicted one, now have to pay this unbearable inheritance tax, but then it will belong to you. You can take that risk, go ahead.

By the way: an early gift (called giving with “warm hands”) reduces the inheritance tax. But you don’t want to hear any of that. And your father didn’t consider it years ago.

Honestly: you are in a quite privileged position. There is something to inherit, you received a plot of land on which you could build, there is family wealth. Others can only dream of that.
What you unfortunately missed (and ignorance doesn’t protect from that), is to cleverly manage the situation, namely through a gift from the father to you. More than 20 years have passed by now, he could have already used the tax exemption twice by giving gifts and thus reduced the inheritance tax.
You didn’t do that because you didn’t inform yourselves sufficiently, because you weren’t interested, or because it would have cost money.
Now you have a mess. Your own fault.
To get out of this, you have to put money in NOW. But what happens: only whining about how bad the situation is.

Really, I have to stop reading here, I just get upset about such an ignorant attitude.

Well, now we are at the fundamental system question. And then it should also be allowed to ask why single parents are single parents.
Of course, it is outrageous that especially the professions close to people are relatively poorly paid. But even there, there is a market with supply and demand...

Could it be that you are far removed from the life of the "normal" population? Every second marriage in Germany is, for example, divorced. And my example was just an example – there are still plenty of other professions and life situations.
A market with supply and demand in such professions? Yeah, right...

You complain from an enormously high level without any connection to reality.

Well, now we are at the fundamental system question. And then it should also be allowed to ask why single parents are single parents.

If you show a "serves you right" mentality here, then start with yourself and ask why you paid for a house that does not belong to you.

Experience teaches that families think much more long-term than, for example, politics.

The experience from this thread is that your family did not think long-term at all. These cliché phrases are annoying. Settle whatever you want to settle with the notary and/or tax advisor. But what exactly do you want now? To transfer the house into your ownership? To save inheritance tax? Define your goal.