Why illegal construction??? It is and remains exempt from approval and was registered.
If the authority knows that the outbuilding is attached, then everything is fine.
I ask a question that I can no longer help myself with. That’s what forums are for.
Yes and no. The give and take for quite a few forum participants consists of being served a series of building ideas as a thank you for their free answers – and those who let themselves be looked into the pot in a coherent manner are often happily advised which spice makes the taste even rounder. You can see this most clearly where the original posters are highly secretive about insights into their dream house plans and only ask about a single door frame. And at least for me, it often happens that I can give more suitable advice based on remembering the puzzle pieces of a project as a whole – but I don’t develop this overview if I first have to scroll through several pages of the original poster’s post history. And this already applies to me with my 11-antenna memory, whereas Yvonne, Katja, and Kerstin (for example) often only look back "within a thread" – which seems quite legitimate to me when giving unpaid advice to limit the effort this way. Neurotics just don’t have the turbocharger like my memory does.