A house in Sewell that sold for $590,000 tops the list of the most expensive residential real estate sales in Washington Township in the past week. $259K, single-family house at 220 Poplar StreetA single-family home at 220 Poplar Street in Turnersville, has been sold. $455K, single-family residence at 29 Cambridge RoadThe single-family house at 29 Cambridge Road in Blackwood has new owners. $537K, single-family home at 1 Grenloch CourtA single-family house at 1 Grenloch Court in Sewell, has been sold. $540K, single-family house at 1 Heritage Valley DriveA 2,271-square-foot single-family residence at 1 Heritage Valley Drive in Sewell has been sold.