In 2017 Griffin who is a resident of Chicago purchased a penthouse apartment atop the No. 9 Walton a luxury condo tower. The purchase broke the record for the most expensive sale in Chicago's history. The condo was delivered as "raw space" so that Griffin could build it out to his liking. Griffin also owns a full floor penthouse at the Waldorf Astoria private residences across the street from No. 9 Walton. Records show he purchased the penthouse for $6.884 million in 2010.