The 19-year-old singer bought the house in 2012 for a little over USD 6 million while Khloe, 29, bought the property from him for USD 7.2 million, reported Ace Showbiz.
The reported purchase took place shortly after Khloe sold her house she once shared with estranged husband Lamar Odom.
"Her move has nothing to do with Justin. She saw that house as a place she'd like to live for a very long time and she's smart because she knows that whenever she wants to sell, she'll make a profit on it," a source said.
"She's going to put her Khloe touch on it and make it hers. She's happy with her decision. She looked a bunch of places and decided on that one because of its amenities and close proximity to her family," the source added.
Bieber reportedly sold the house following reports of him driving in dangerous manner around the neighbourhood and his alleged egg attack.