Duplex for sale by owner in Sheboygan, WI 53081. A must see . . . Spacious Ranch Duplex . . . In A Quiet Safe Neighborhood . . . This quality ranch duplex was built by Alex Ehler Construction--Alex being the contractor. The advantage of living in this duplex is that it is built with such quality and so well insulated that you don't hear your neighbors through the walls. Another advantage in owning this duplex is that you can rent out one side and live in the other. The monthly rent from one side... See site for full property details.