Leroy R. Willard House
The Leroy R. Willard House, also known as Willard Mansion, is located in Marshalltown, Iowa. The house was built in 1910 for Leroy R Willard and has been listed on the National Register of Historic Places since 1976. History. LeRoy Randall Willard (1 July 1864 - 2 October 1917) was owner of the Marshall Oil Company. The home was designed by Charles Eckman using Edwardian Georgian architectural styles.