What belongs to the built-up area?

Hello,

my plot has the following key data:

Size 639 m2
Floor area ratio 0.4 (the special regulation that allows up to 50% excess is excluded in the development plan)
Floor space index 0.5

I can therefore build over 255.60 m2.

What exactly belongs to the built-up area?

It seems clear that the house, garage, carport + any outbuildings belong to it.

But what about the driveway in front of the garage, garden shed, terraces, paved paths, and possibly a fixed in-ground outdoor pool?

But what about the driveway in front of the garage, garden shed, terraces, paved paths, and possibly a fixed built-in outdoor pool?

That is also included in the floor area ratio.
For the outdoor pool, I do not know.

I don't know about outdoor pools.

The same here.

Frankfurt, Hamburg, Munich have nice information sheets available for download on their websites. I find them quite understandable.