DARIEN, CONN. — Normandy Real Estate Partners has sold Darien Green, a 79,287-square-foot, two-building office campus in Darien for $4.9 million. Darien is located five miles east of Stamford. Fletcher Development and Silver Heights Development acquired the property and, following a capital improvement project, will rebrand the campus as Darien Crossing. The campus was built between 1976 and 1978 and consists of a 50,182-square-foot office building at 320 Boston Post Road and a 29,105-square-foot office building at 330 Boston Post Road. Stamford-based commercial real estate firm RHYS has been appointed as the exclusive leasing agent for the property.