Floor plan tube house L-shape triangular plot including oak tree

Floor area ratio and plot ratio?

I have to educate myself on that...sorry.

Yes, we want the garage underground so that the basement apartment can have windows on the street side. This is achieved by allowing light to enter the driveway to the garage. Also, a front door to the apartment immediately in front of the garage door.

Sketch that with the dimensions you have in mind into the property site plan.

doesn’t claim to know. Kronentrauf... you just have to accept it like that. Nevertheless, I see 10 meters width (or similar) to the east of the oak for a house. However, I wouldn’t want to tie myself up with the corset of an underground garage and a granny flat: it’s already difficult enough to build a nice residential house. If it comes about, okay. But priority should be given to the own living unit.

The property is small. The question is whether you are allowed to build that large at all. An [Einliegerwohnung] costs money, especially on the property. I have my doubts whether it is worthwhile.

In my opinion, the question of placement does not arise. I haven’t read anything about permitted edge development or the like. That means 3m distance to all boundaries. With some luck, it is only 2m to the public paths or so. But I wouldn’t assume that for now, and whether that would be nice is also questionable.

3 meters to the neighbor in the east. 2 meters on the other two sides each.

Not even a 10x10 house fits into the building field. Or have I fundamentally misunderstood something? Here, you will probably even have to build diagonally to reach the m². What are the floor area ratio and the plot ratio? I think the tree is your smallest problem.

Parallel to the property boundary in the east is roughly our idea...

That will be exciting. 200m²? Only if you were allowed to build 3 stories, perhaps.

The 200 sqm includes the finished basement. We are allowed to build two stories.

Coming on top.

Oh dear
Sounds like a cigarette pack standing upright

I doubt that you will reach your 200 sqm even without a granny flat