When big furniture pushes right up against each other and every corner is filled, the room feels heavy and cramped. Your eyes can’t see continuous floor, so your brain reads it as “no space left.”
Leaving a bit of breathing room—a little gap between sofa and wall, visible floor under a bed or cabinet on legs, clear corners—creates a sense of openness. The actual square footage hasn’t changed, but the perception has.
It also makes cleaning easier and lets light flow better, both natural and artificial. The room feels like it has space to move, not like everything was squeezed in because there was no choice.