The Louvre Murphy cabinet bed solves that in under a minute: it sits against the wall looking like a handsome louvered console, then folds open into a real queen sleeping platform with the mattress already packed inside.

Closed, it takes up roughly ten square feet, so a den, office or studio keeps its floor the other three hundred nights a year. A rolling storage drawer underneath swallows bedding, folding trays give guests somewhere to set a coffee, and a built-in dual power and USB module means nobody hunts for an outlet at midnight. The cabinet arrives fully assembled with the base packed within it. Leave a clear run of floor in front of the cabinet for the bed to open into, and check that a queen footprint fits before you commit the corner.