Build a single-family house suitable for absence - what should be considered?

Better a semi-detached house - rent to the neighbors.

No, the space will just be enough for my room program. And even then it will be tight.

Matthias

Baden Baden or Munich Bogenhausen.

That's where the elite live....

In Berlin you only have left-wing stuff

I would also build a kind of vault room for your documents that can survive a fire. We had such a chamber in a tax office. Heavy door, thick walls, only openable with a code. I would replace the fence, whether you build or not. You can avoid the vandalism.

I don't think it's possible to build a completely secure house like that. You would also need fire doors, flame-retardant materials, etc. inside the building. An archive that you want to protect from destruction is usually stored in specially created rooms or cabinets. Fireproof, waterproof,...

How is a camera or something similar supposed to stop a stone thrower? And if you ask me—such a "freak house" rather encourages these stupid-boy pranks than deters them. Just my two cents

It doesn't have to look like "Freakhaus".