Selling new construction after receiving funding / Wohnriester - possible?

That can't be serious. I'll put it this way: there's a reason why classical music was or is played continuously at the Hamburg train station site. To be honest, I find it surprising that Kati is portrayed as particularly sensitive. As far as I know, on the other properties you simply didn't hear it that much. Continuous music/noises annoy many, myself included :) And I'm certainly not hypersensitive.

For me, a garden means relaxation through silence and natural sounds. I find the rustling of leaves, birdsong, etc. very calming and good for unwinding from everyday stress. However, when the background is infiltrated by music, my relaxation is gone. On good days I can tolerate it, but I can't relax. On bad days I go to a room where I don't have to perceive it.

Apparently, the neighbor relaxes best with music in the garden.
The only solution where we could both find relaxation would be if he listens to his music by himself. Only he has control over that, but apparently he doesn't want to. After all, there are many people who live by the motto "if everyone thinks of themselves, everyone is thought of."

The solution would be a middle ground. You can't expect him to give up his music 100% as long as it is at times when he is allowed to listen to music. Neighborhood means compromises and not just enforcing your own wishes.