[yayachiken]

> It does not sufficiently alleviate the effects of WW2 and other developments.

Remember, we are still talking about the claim that renovation of the building stock takes approximately 100 years.

It does not matter whether we are building more because people need more space, or because houses are actually replaced. All that matters is that the percentage of the building stock built under modern energetic regulations rises sufficiently fast.

This is why this discussion is so frustrating for me. It's all about semantics that don't matter, when my point was actually just disproving a point I thought to be ridiculous (which with the new research I did for my rebuttals was actually sort of disproved, as Germany seems to be really good at renovating the building stock compared to e.g. Eastern Europe), which is also why this will probably be my last post in this thread.

> You are misinterpreting them. They don't literally say "houses are worseless on average after a 100 years". They say "houses are worseless on average after a 100 years without doing anything to increase their value". And this is certaily more or less accurate.

You seem really hung up on the topic of depreciation accounting (AfA) and don't seem to get my point. Depreciation is regulated and does not exist in a vacuum.

Depreciation is a legal fiction to model the reduction in value of assets in such a way that it is easy to calculate, but also close to the actual value that would be fetched on the market due to the depreciation.

You are essentially claiming several things with your argument: 1. depreciation is not correlated with actual value loss, and therefore 2. the economic lifetime model used to calculate depreciation does not correlate with actual use lifetime.

The first is correct: Renovation expenses can be used to raise the book value of the asset making them balance-neutral. The second is not and especially does not follow from the first for the reason that I told you, the lifetime model used in depreciation calculation is based on the observed lifetimes in reality. There is also feedback in the other direction as engineering decisions are taken based on the best practices in economic lifetimes, which is why I cited the relevant DIN norm for cost calculation for builders in my first post.

> That solution is what I would try in your situation.

Thanks for your advice. But I already tried that. And it's pretty funny that you literally try to explain the mentality of my grandma to me. But what do I know it's only my grandma.

Let's just let the topic rest, I do not really care about this discussion anymore.