The William Penn Apartments, at 1644 Pennsylvania St., sold for $2.25 million. Kenneth W. Zablotny, Barbara K. Zablotny, Kerry L. Semonsen and Debra M. Semonsen sold the four story, multifamily building. William Penn Apartments LLC purchased the 35-unit, 22,834-square-foot property for approximately $64,286 per unit.