How is the maximum allowable living area calculated?

Thank you. According to the architect, the balcony is counted at 50%. Is it the case that balconies belong to the "countable structural facilities, that is, the main facility" and not to ancillary facilities?

Here I wrote it:

The second floor area ratio, that is the additional one for ancillary facilities, the permitted excess, cannot be applied because the balcony belongs to the house and not to paths, garages, and ancillary facilities.

He said he also had to remove the roof (example photo below) of the entrance area outside because that was no longer possible due to the floor area ratio.

Yes, that also belongs to the house.

Or rather, when does a balcony belong to the main and ancillary facility?

A balcony of a house belongs to the house, just like the terrace. So to the main building. Ancillary facilities are carports, garages, or a garden house and their driveways and paths.

Here I wrote it: Yes, it is part of the house. A balcony of a house belongs to the house, just like the terrace. So to the main building. Ancillary facilities are carports, garages or a garden house and their driveways and paths.

THANK YOU! Unfortunately, the laws do not define exactly where a balcony belongs to and that is confusing.

Thank you. According to the architect, the balcony is included at 50%.

But that is probably because of the full story regulation, and I had assumed 25%. What is built over is also counted 1:1, this also applies to roof overhangs greater than 50 cm.

Here it is also stated. However, with the old balcony dimensions. I would leave it out anyway, no one needs it when there is a garden. However, giving it up is of no use. I wouldn’t worry about the missing entrance canopy either. I would slightly reduce the pantry and give more space to the wardrobe.

In my opinion, that is all quite well thought out. What I would carefully reconsider is the airspace and the open staircase. It might look quite nice. But the connection to the upper floor is often not so good. I had it like that too and changed it later on. One more room and finally peace in the living room. I don't find it so great when I want to watch TV and someone is constantly walking up and down the stairs.

Housekeeping room into the airspace. Going down to the basement every time is not so great.