Experiences with photovoltaics in a house with five residential units?

I am more struggling with another question, namely whether it is basically advisable at all to start such a project, only to then bring four tenants onto the property. In terms of yield, it is probably better than other investment forms, but it can also bring a lot of problems...

You are good at struggling. It’s not your first idea

Within a radius of 50 meters, there are mainly houses with one full floor and a developed attic, but there is also a house with two full floors and a developed attic. The structural utilization of the property would also allow that. So why shouldn’t it work?

Because you want a multi-family house and not a single-family house with many residential units.

But why should there even be talk of single-family houses or multi-family houses in the 34 zone? That is precisely the beauty of it, that you are allowed to build anything there that fits into the surroundings...

Because in the 34 zone, the type and scale of the development must fit into the surroundings. The building authority can – but does not have to – decide that the size (= scale of development) is appropriate, but the type (multi-family house instead of single-family house) is not. There is a lot of room for discretion...

Ok, true... I am definitely unsure whether I should tackle this or not. Recently, someone with rental experience clearly advised against it.

Recently, someone with rental experience clearly advised me against it.

Why?

He had too much trouble, despite careful selection. And he generally considers [Mietrecht] to be too one-sided in favor of the tenants. Which is not entirely unreasonable...