The Tudor mansion reverted to the foreclosing lender at Wednesday's auction in Pomona.
The opening bid was $10.4 million, but there are $18 million worth of loans on the property.
The nearly 12,000-square-foot mansion boasts six bedrooms, a central tower, home theater and Olympic-sized pool.
Even though he's one of Hollywood's highest-paid stars, Cage has money troubles. He owes millions in unpaid taxes, and in January, his foreclosed home in Las Vegas sold for nearly $5 million.
Cage sued his former business manager in October for $20 million, claiming the man's advice led him toward financial ruin. The ex-manager says Cage is a spendthrift.