Complimenting a flexible open area on one side of this apartment are a series of suspended separators that provide storage but also move along rails, opening up a variety of additional functions on demand. If the system looks familiar: it is based on the sliding stacks often used to save space in libraries.

Designed by PKMN Architectures in Madrid, Spain (with images by Javier de Paz García), this cost-and-space-saving solution employs relatively cheap materials including engineered particle wood boards (composed of glued wooden flakes) and a ceiling-hung system of industrial rails.

The three suspended sections offer shelves and cabinets and variously create a kitchen, dining or living room depending on how they are configured and positioned relative to the room and one another.

Fold-down tables and a fold-out bed are able to be accessed as needed while the walls are variously occupied by storage, openings or unique decorative, fun and functional touches (like a blackboard for sketching ideas during meetings).

Sliding panels can also provide privacy when desired, separating the more open space from the modular-room side of the apartment. The fixed-in-place spaces are reserved for open living and dining areas as well as a bathroom in one corner of the unit.