How much remaining debt at 46 is okay?

So twice as much is perhaps a bit exaggerated. But 50-80% more for sure, yes. I myself bought a condominium in Rummelsburg in 2015. I could now sell it for 40-50% more (-5 years of "depreciation" would then be about 50-60%). But the current interest rate for me is only 55% of what it was back then.

In my opinion, there is no bubble in Berlin either. Because Berlin simply had a huge backlog in demand compared to Germany, but especially in European comparison. That’s why Chinese, Scandinavians, and Russians invested in luxury buildings in Berlin, which are now half empty. Furthermore, the price for new rentals is still very high.

Then a large part of the increases over the last two years was commodity-related. But that is not reversing, even if availability improves again. The margin created then is already pocketed by someone. And when some tie it up for more inventory coverage.

Bubble in some areas definitely - in Berlin I think rather not.

I already said, this leads nowhere… that even remotely helps any builder in any way.

So twice as much is maybe a bit exaggerated. But 50-80% more definitely, yes. I myself bought a condominium in Rummelsburg in 2015. I could now sell it for 40-50% more (-5 years "depreciation" are then about 50-60%). But the current interest rate is only 55% of what it was back then. In my opinion, there is no bubble in Berlin either. Because we simply had a huge backlog demand in Berlin compared to Germany, but especially in comparison to Europe. That’s why Chinese, Scandinavians, and Russians invested in Berlin luxury buildings, which now stand half empty. Also, the price of new rentals is still very high. Then a large part of the increases in the last two years was due to raw materials. But this will not reverse again, even if availability improves. The resulting margin will already be pocketed by someone. And if some then tie it up for more storage capacity. Bubble in some areas certainly – Berlin I think not.

But prices are more than twice as high. For plots, we are even talking about price increases of several hundred percent. I have been following the real estate market in my town since my purchase. I even know actually achieved purchase prices from the neighborhood, because you get into conversation with people. My parents’ neighboring house is now being sold for the second time. It is a really great property. Apart from the garden, there have been no significant changes to the house. The selling price has more than doubled. The house is so expensive that I could not even finance it together with my wife (healthily) if I were starting from "zero" now, i.e., had only saved money. You could have bought much more cheaply in Prenzlauer Berg 10 years ago. I lived there, right next to a single-family home area called "Blumenviertel." Today unthinkable.

Yeah me too. I see it differently. However, I mean Berlin, that was already a bit more expensive before. It may be that there were more extreme percentage values in Brandenburg.

Although we have never really thought about it, I will try to answer you anyway:

1) Property value / construction costs at purchase = approx. 600,000 including land (we will only know exactly after moving in, in about 7-8 months)
2) Remaining debt after the first financing = ?, presumably when the house is built and furnished in about 7-8 months, we will have about 160,000 euros of debt, but this is offset, among other things, by payable life insurance policies
3) Age at remaining debt = Age at follow-up financing = dead

My ex bought his 3-room apartment in Charlottenburg in 2006 for 250,000 euros – and everyone called him crazy for putting so much money into such a rundown apartment with night storage heaters. Two years ago, he sold the apartment for 850,000 euros. And he’s kicking himself because he didn’t wait any longer. A friend was just offered to buy the rented 3-room 80 sqm apartment in Tempelhof for 700,000 euros. Berlin is currently no benchmark for anything.

My ex bought his 3-room apartment in Charlottenburg in 2006 for 250,000 euros – and everyone thought he was crazy to invest so much money in such a run-down apartment with night storage heaters. Two years ago, he sold the apartment for 850,000 euros. And he’s kicking himself for not having waited even longer. A friend was just offered to buy her rented 3-room 80 sqm apartment in Tempelhof for 700,000 euros. Berlin is currently no benchmark for anything.

That’s of course great for your ex :) but where there’s an upward trend, there’ll eventually be a downward trend. And vice versa. In a few years, the new owner might say to themselves: “Man, I bought the apartment for 700k and now I’m only getting 400k for it, what a bummer!” ;)
Anyone who has a term until 87 and plans to profitably sell the property at retirement hasn’t understood the principle.

Buying today at unrealistic prices and selling at a profit in 10 to 20 years... you really can’t rely on that, right?
If property prices fall by then, you’ll still be stuck with a mountain of debt. Because you still have to repay the loan taken out plus interest to the bank. If you buy the building for 900k and sell it 20 years later for only 700k, you not only have no money left for another apartment but also debts with the bank... or am I mistaken as a layman? Please enlighten me if that’s the case.

We are also soon buying an apartment with 100 sqm for about 330k. New build and kfw40. We have an income of about 5200 and are currently saving around 1200 euros monthly. But I can’t imagine saving more right now. I’m 38 and my wife 33. But even when you’ve paid off the loan, you still need a certain saving rate on the side. You can see right now how living costs are developing.