There's a stab of disappointment and relief both at the idea that she'd rather have a room of her own. He recognizes both, qualifies them, pushes them down, and then turns back to face her.

After a mumbled apology for stopping short, he cants his head back in the direction they came. "The rooms are down on the seventy-sixth floor."

That's more than a floor or two down, but he's not the only person in the house given a floor to call his own, even if a couple of them are unoccupied as of present.