1. Face the balcony standing up (screen: http://cloud-4.steamusercontent.com/ugc/710779919464611074/28A2CCE112A6E97A9ECD7233C0B63F54513CE108/)
2. Start running towards it (it helps if you move a little left and right with the mouse).
3. After a little while you start sinking into the wall until you are completely inside the wall.
4. At this point you are "stuck" and cannot move forward but when you stop running and start again you'll get freed and can move further into the house.