hm, some keywords. Whether they help, I don't know:
-The terrace belongs to the floor area ratio I!
-You only get a building permit for ancillary structures that are against the requirements if the architect argues cleverly. IMHO I see no reason why you should exceed the building boundary.
-if it is not changed in the development plan, then the state building code applies
-I can't remember that our driveway is named in terms of area in the building application.