Ron was lying sprawled on his back with his mouth wide open, fast asleep. He did not stir as Harry crossed the room, stepped out onto the landing, and closed the door softly behind him. Trying not to think of the next time he would see Ron, when they might no longer be fellow students at Hogwarts, Harry walked quietly down the stairs, past the heads of Kreacher’s ancestors, and into the kitchen.
Does it also mean the area directly behind or in front of a door? Because the above paragraph states that Harry was still able to close the door even if he was on the landing. So it must mean something else of the landing is pretty close to his bedroom?