Reports say Song Joong Ki bought a private home this past January, which is estimated to cost $10 billion Won (~$8,917,400 USD). It's described as a 602 square meter property with 2 stories and 1 basement floor.
His agency Blossom Entertainment stated, "Real estate matters are Song Joong Ki's personal issue. The agency does not know whether or not he acquired a property."
Song Joong Ki also reportedly owns a villa in Seoul estimated to cost 2.5 billion Won (~$2,229,475 USD).