That little box room has a built in wardrobe which I have lined with carpet, it houses about 6 cases at the front with two deep shelves at the back for all my other gear and what not, it's basically the same depth as the width of the stairs below it. I have a double drawer dressing table that houses the laptop and all that stuff, and shelves with power amp, guitar amp, drum machine etc etc all wired up through a pair of speakers either side of the table, there is everything you could need all in that little room!