With its “continuous and scalable system of interlocking components,” SmartFurniture offers a – well, smart – solution for under-stair storage in an open floorplan: Smart Shelves. Each individual square can hold up to 75 pounds and can act as an internal or external piece, allowing you to add as many segments as you wish. Although the Trilogy Shelf, shown here, is 6’ wide, the signature shelving system easily climbs into the square, rectangular, triangular or abstract shape of your choosing, rendering it perfect for under-stair storage or display.  Smart Shelves are highly customizable, with multiple options for individual shelf length, width, height, thickness and finish; in fact, the possibilities are nearly limitless.  Starts at $362, as seen in photos.