The 4,306-square-foot house in the Butterfield Creek neighborhood was built in 2007.
Mr. O'Reilly is the owner of Gaelic Construction in Chicago. Previously, he was a customer service manager at Motorola and a manufacturing engineer for Data 100.
He studied telecommunications at the Cork Institute of Technology in Ireland.
According to BlockShopper.com, there were 312 home sales in Matteson in 2008, with a median sales price of $158,000.
Address: 21131 Vivienne Drive
Buyer(s): Northern Trust Co Ltd Gdn and Tamela McDonald (Deceased)
Seller(s): Tadgh Oreilly
Sale date: Sep. 11, 2009