How must the mounting positions be arranged?

But the granny flat officially does not exist,

Read the original post?

Where does it say that the apartment officially does not exist? Unfortunately, the OP has the habit of not continuing her threads, so I do not expect any more posts here either

Sorry, but I only just now see the multitude of responses. I am trying to "continue the threads." It is officially a granny flat - also everything is separate (electricity, water), own entrance.

Then you will also have to provide proof of at least one parking space for this residential unit, so I would definitely build it, because sooner or later the friendly uncle from the office will come and check whether what was approved has actually been built.