 Upon coming into his father's estate, Louis decided to demolish the House on the Mound and replace it with a more contemporary Victorian Italianate style house that included modern indoor plumbing and central heating, both considered luxuries at the time.Louis Dousman contracted with Milwaukee architect E. Townsend Mix in 1870 to have the new house designed and built, and construction was finished in 1871.The new mansion was built with some parts of the old demolished one.