Future development of construction costs

The problem is, as I have experienced myself, that so-called financial advisors who work directly with certain house-building companies propose exactly such financing options. This ensures that the already overpriced offer yields an attractive installment, and the "stupid" customer, who just wanted to get information, is coaxed into signing a preliminary contract after the 2nd or 3rd meeting.

No, I did not sign anything, but it was hinted at during one meeting, and I am sure that some people who already have this dream, have just barely enough income to service the 1% repayment contract, and seeing the very short deadline of the "affordable price guarantee," fall into the signature trap.

The awakening usually comes after the cancellation period, if it is granted at all.

By the way, I will not have any further talks with this company

Sorry, but anyone who lets themselves be talked into a 10-year fixed rate and 1% repayment is a foolish homeowner. A bank is also not happy when loans become non-performing and foreclosure proceedings have to be initiated. Large banks already set 2%. Solely out of self-interest. It is also a myth that everything will collapse in 10 years. In case of emergency, the ECB will again flood the markets with cheap money.

The comparison calculated against inflation is too simplistic. Construction costs can, of course, develop above or below average. Individual regions change in price just like the interest rate level, the land supply, public charges ...

Perhaps there is also a cultural shift that changes the priority of homeownership. Or the fixation on a certain region. For example, if indeed more people work from home, the S-Bahn connection and the proximity to the big city lose priority.
Maybe building no longer necessarily means ownership at some point. Or rethinking paying off until retirement (a completely pointless goal) as a preliminary stage.

Finance with 1% repayment and get security through a 20-year fixed interest rate. Then the kids are out of the house and the huge house goes to the next young family as needed. The same pattern "paid off by retirement" also includes "last property in life."

I did not write that I want to finance with 1% repayment.

My point is exactly that this is why the price spiral keeps rising steeply. Because everyone can afford a home even though they can't, and they are presented with such offers from so-called "experts." Someone who does not deal with the topic of financing beforehand and is also naive will be driven into the debt trap by such an offer from such a supraregional home provider with an associated financial advisor.

If not everything is even read through in a 5-page thread, then just shut up and don't senselessly clog the thread with any statements/wisdom!

I am seriously interested in building a house and do not think I am in the worst financial situation to implement this. The question about the right time still had to be clarified, and apparently it is better now than later.

I did not say that I want to finance with 1% repayment. It is exactly this that causes the price spiral to continue rising steeply. Because everyone can afford a home even though they couldn’t, and are presented with such offers from so-called "experts." Someone who doesn’t deal with financing beforehand and is also trusting will then be driven into the debt trap with such an offer from such a supraregional home provider with an associated financial advisor. If after 5 pages of the thread not everything is even read, then just shut up and don’t clutter the thread senselessly with any statements/wisdom! I am seriously interested in building a house and do not think I am in the worst financial situation to do so. The question of the right time still had to be clarified, and apparently it’s better now than later.

I also would not leave it at saying that the price increase is only due to potentially distressed loans. In the 90s, we had high interest rates. Even then, houses were built and financed. The price increase now is somewhat linked to the low interest rate level. More people can afford houses. And that the plots and houses got smaller in size has already been said.

That's the irony.
Lower interest rates = more people build houses = houses become more expensive = fewer people can build houses.

Everything has its cycles. Market interventions, like low interest rates, can shorten or lengthen cycles.

Yes, sounds macabre but it is so. We could observe it well with us. Closing at 3.25%, no 2 years later we would have had 2.25%, but the developer adjusted his prices to the market at the same time. Especially the plots of land were the price drivers. The winners of the falling interest rate level are the builders who refinanced. I personally think that's great too. People who have paid 8/7/6% for years are finally done. We personally were also able to refinance at 2%.