Walk into the house through the door on the left. Go up the three stairs on the left. Enter the bathroom under the stairs. Stop in the doorway.
Enter the house at the sliding doors, into the living room. Continue going towards the stairs, then past the stairs, stopping in the doorway on the right.
Enter the building through the sliding glass doors next to you and continue forward until you can climb the three steps to your left. Climb those steps and head to the opening to the left of the spiral staircase on your right. Stop just prior to reaching the curved door.