The Uninvited Guest (2004)

Open the door to your worst nightmare in this exciting and stylish thriller. After his girlfriend walks out on him, architect Felix finds himself living alone in the large, empty house he designed. One night, a mysterious visitor asks to use Felix's phone and quickly vanishes in the house without a trace. As disturbing events unfold and his own paranoia runs wild, Felix begins to question whether the visitor actually exists, and if the house has an identity of its own.