I have chosen to divide the large apartment so that both of the new smaller apartments have access to the terrace and park.
In order to keep the stair access for both apartments the easiest solution is to move the entrances a little bit inside so that there is now a common acces hall which can be closed or not, or can be used as a common wardrobe, etc.
I tried to keep as much of the existing walls as possible and you can see this in the intervention plan.