Yeah, that sounds nice, I'm rented so I can't make permanent modifications. We're on a town home (4 unit building with separate flats top and bottom) and this area isn't great so I can't keep it outside.
Already had my last bike stolen that way (2018 Fuji)
Before when I lived in the bottom flat I used the staircase to store it and that protected it from the elements, and passerby couldn't see it.
https://files.catbox.moe/mu4qgj.jpg
Do you have any pics of your storage nook?