Five Post Oak Park is a skyscraper in Houston, Texas. The building, with Class A office space, has the headquarters of Amegy Bank and Willbros Group. Five Post Oak Park is located in the 43 acres (17 ha) Post Oak Park business park. Originally developed by The Winter Company and completed in 1982, Five Post Oak Park is a 28 story building on 3.8 acres (1.5 ha) of land. It has 567,396 square feet (52,712.8 m2) of rentable space and a 1,673-stall parking garage. It is located in proximity to Uptown and inside the 610 Loop. The building is in proximity to River Oaks and Tanglewood.