Republic Properties Corp. broke ground on its newest development, The Portals Phase III. Located at 1201 Maryland Ave., SW in Washington, DC, the 10-story, 504,820-square-foot, Class-A office building is situated on the Potomac waterfront. It is just south of the National Mall in an expanding office market. In addition, the project is adjacent to the newly-opened, five-star Mandarin Oriental Hotel.