With passage through the door complete the Sanctum Sanctorum would swallow the manifestation whole, causing the door to - seemingly - disappear into thin air. Only a few minutes after the woman's entrance into the building would Strange appear atop a set of stairs that he would pause on. A moment would be taken as he considered the young woman within the walls of his - if the Sanctum Sanctorum could be called his - house. Xavier had recommended she come here, and if his former friend felt so strongly in that regard then it was Stephen's desire to uphold his departed comrade's wish.
"Welcome to the Sanctum Sanctorum." Strange smiled warmly before beginning to descend the steps before him. "I trust you were able to find it easily enough?" Which, with a history like this house had, it was unlikely that she had any trouble at all. Then if one were to add in the ability to sense the presence of magic - which he assumed she could - Wanda probably felt this place a mile away. After all, the Sanctum Sanctorum was one of the most magical locations within New York. "Would you like anything to drink? I would offer food, but I fear most of what I consume would not be pleasing to the average palette."