Piedmont Office Realty Trust Inc. and Lake Mary-based Providence One Partners LLC are prepared to break ground for a new Class A office building in Lake Mary called the 500 TownPark. The $30 million, 135,000-square-foot office project will be located at 500 Colonial Center Parkway, in the Colonial TownPark development. The four-story building will also feature a 600-space parking structure. Baker Barrios Architects is the project architect, with Brasfield & Gorrie LLC selected as the general contractor.