Energy refurbishment does not pay off! What to do?

It seems to me that the money simply isn't there and you're looking for reasons not to do it, but then just communicate it like that. Surely some good ideas regarding funding, etc., will come up here.

For example, basement ceiling insulation with 12cm PUR done yourself – it goes extremely fast and costs only a small single-digit 1,000€ amount. Attachment with PU adhesive foam. And then you have a basement ceiling with insulation at new-build level (in NRW there are two great second-choice dealers whose prices are so good that it is worth accepting the moderate delivery costs and foregoing funding by doing the work yourself – insulating 50sqm of basement ceiling then costs under 1,000€). Pays off in a few years.

No, I was only concerned with amortization and economic efficiency. And unfortunately, the house seems to be so special (especially regarding the windows) that an energy-efficient renovation would be very expensive. And with a probable living time of max. 40 years (I would be 84 then), the costs (despite rising gas prices and CO2 charges) and also despite subsidies will never be (economically) worthwhile. As I already said: even if I saved 2000 euros out of the 2600 euros energy costs per year (and that is very optimistic) it would only save 80,000 euros over 40 years (with renovation costs around 130,000 euros +). With this much too high savings estimate I have basically already factored in the rising gas prices in the future. Let's leave out all this well-being and sales value. One is subjective and the other is crystal ball gazing. Purely economically, it is not comprehensible. Someone wrote that it would then make more sense to rent an energetically well-equipped apartment. And that is exactly what it’s about. It’s about deciding—do I choose a less economical solution because I absolutely want to live in this house or do I look for another house which offers better basic values, or do I take the house and do nothing—and just live in it. However— it was also said here— the problem could be that after another 20 years everything might have to be renewed because then the gas heating will finally be broken and the windows completely shot. That is what I was getting at. Who says that these windows and the house won’t last another 30-40 years. Honestly, without all the political discussions and subsidies, very few would have thought about all these renovation measures. Why have almost all the boomer houses generally remained unsanitized to this day?! And they are still selling at decent prices—renovated or not. I have been looking for a house for two years and I cannot confirm (what the newspapers write) that unsanitary houses remain unsold or are only sold at very high discounts. That only comes from the fact that all prices were too high anyway from the time of zero interest rates.

Economically, it is not comprehensible. Someone wrote that it would then be more sensible to rent an energetically well-positioned apartment... and that is exactly what it’s about.

Yep. I stand by that statement as well. Get rid of the old shack while you still can and move into a new apartment.

I have been searching for a house for two years and I cannot confirm (what the newspapers write) that unrenovated houses remain unsold or are only sold with very high discounts...

But that is actually the case. I see it every day.
And just so you know: For a professional investor, newly built homes at the KfW 55 standard are no longer marketable today. Large investors simply no longer buy them due to future prospects. Perhaps that as a concluding remark from the real estate industry.

Where I am not sure how it will look after the next election. Maybe then the oil heating obligation will come.

You continue to ignore the high, surely 5-figure funding! I don’t feel like checking exactly. But apparently you don’t either. So all good. Just buy it and live in it!

No, I just meant . . .

Then I don't understand why you ask a question/questions here, see here

How do you see that? Am I misunderstanding something? Is anyone else in this situation? What would you do?

if everything is indisputable for you anyway.