The Aardex LLC development firm of Golden, Colo., developers of the Signature Centre, one of Colorado’s first LEED® Platinum buildings, plans to break ground this summer on a 410,000-square-foot, $150 million office building in Centennial. Colo. The 18-story building, to be called Signature Tower, will also seek LEED Platinum certification. Signature Tower’s design, for which the firm’s Ashley Lemon, AIA, serves as architect of record, will include under-floor heating, ventilation, and air conditioning (HVAC); temperature and ventilation that can be controlled by employees; heat-reducing window glass; task lighting; and electrostatic air filtering. Native and other natural materials will be used in construction to reduce environmental impact. Building amenities will include 1,500 parking spaces in a six-story garage, plus some street parking, as well as a cafe, fitness center, meeting rooms, and outdoor plaza with WiFi connectivity. The project is slated for completion in 2010.