@OP you can make life or building itself difficult. How do you come up with the idea of wanting to build in a flood zone when your first question is about the costs???
Sorry, but that is pure cynicism.
How does he come up with the idea? Probably there simply are no alternatives at the moment.
Do you think there is always, everywhere, the perfect plot of land for everyone? And also at any price?
but the municipalities also don’t learn from the misdevelopment of the past decades... how the responsible nature conservation authority, disaster control and land-use planning can even designate development plans in flood zones is beyond me.
Look at Deggendorf, nobody probably thought it would ever get flooded and it doesn’t matter at all whether the flood only comes once every 100 years, if it comes then you’re ruined...
That completely misses the reality of life.
People have been building on rivers for thousands of years, they build on Vesuvius, above coal mines and elsewhere.
If you didn’t build anywhere anymore where there is a likelihood that every 100-200 years the hut goes down the drain or otherwise falls victim to nature, half of the building stock wouldn’t exist at all.
The probability indeed makes a big difference. In Passau on the Danube the basement is underwater every 2 years, in the TE’s building area maybe only in the next but one millennium. And therefore he’s not supposed to build there today?
The HQExtreme area also means that you are at the edge of a possible flood. That means you just have some water in the basement, not 3 meters of mud flood up to the first floor.
That is certainly not great, but it also doesn’t mean that the whole house collapses because of it.