Duplex for sale by owner in Ulster, PA 18850. Very clean, and Newly Painted Interior 10 Bedroom, 2 full bath, Duplex Side By side (Each Side of Duplex had 5 bedrooms, and 1 full bath, at 1,750 sq. ft. per side). The property is Freshly painted with carpeting, laminate and vinyl floors, new windows and roofing. Each side of the Duplex, has ... more.