WHITE PLAINS, N.Y. — The NRP Group and RPW Group have opened The Halden, a 303-unit community in White Plains. The Halden comprises three apartment buildings across a 70-acre site. The property is adjacent to a 620,000-square-foot office building that was previously the world headquarters of IBM. Units come in one-, two- and three-bedroom layouts and include features such as quartz countertops, backlit bathroom mirrors, plank flooring, stainless steel appliances and in-unit washers and dryers. Amenities include a gym, pool, bike storage room, children’s playroom, package concierge, co-working spaces and a courtyard with grilling stations.