Staircases take up a lot of space, so why not use them for storage as well. Imagine each step is a box with a hidden drawer in it still allowing for additional storage or home office space beneath the staircase.
Firewood storage under stairs --- A duplex in Porto Alegre Brazil Looks like a sliding barn door that covers the side of stairs. Love that idea n the way it's designed it looks like insulation would not be an issue unlike reg barn sliding door
Italian architecture firm Studioata designed this small space with an office/studio loft above that is connected by simple floating white stairs. Like the console table doing double duty as a stair tread.