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PLANO, TEXAS — Dallas-based development firm Heady Investments has broken ground on Headquarters II, a project in Plano that will deliver two 14-story office buildings totaling 450,000 square feet. Designed by O’Brien Architects, the development will be located in the Legacy area and will also feature parking garages and a hotel. The Dallas Morning News reports that the project will have a construction period lasting 19 months.