1900 Crystal Drive is a mixed-use development at National Landing consisting of two residential buildings with core-and-shell retail spaces and two levels of below-grade parking. The 26-story north building features 337 units and 21,800 square feet of retail space. The 27-story south building has 471 units and 16,800 square feet of retail space. Clark demolished an existing 13-story office building and relocated utilities that serve surrounding buildings. Sitework includes a new alley over the parking garage, sidewalks around both buildings, feature stairs between the plaza and retail area, landscaping, and stonework.