It is not public vs private place that matters in this situation. Here's a summary of German photography laws [1]. It's mostly based on privacy rights, and your

It is not public vs private place that matters in this situation. Here's a summary of German photography laws [1]. It's mostly based on privacy rights, and your privacy rights do not go away just because you happen to not be in a public space. [1] https://allaboutberlin.com/guides/photography-laws-germany https://allaboutberlin.com/guides/photography-laws-germany