We are constantly adding to the list of green buildings we have completed around the world and to our range of sustainable services. The projects on this and the following pages showcase HOCHTIEF’s technological and architectural prowess in meeting—in some cases voluntary—high standards of sustainability.
Office and commercial buildings
In the fall of 2009, HOCHTIEF Development Switzerland hands over Portikon, so far the largest project built to the criteria of the Swiss Minergie-P standard and to electrobiological compatibility principles. Electromagnetic radiation is minimized during construction to create an agreeable working environment. Concrete core activation ensures a well-tempered indoor climate in summer and winter. Windows can be opened for natural ventilation.
The new Unilever building developed in Hamburg’s HafenCity by HOCHTIEF Projektentwicklung not only stands out for its trailblazing energy technology: The Unilever headquarters mirrors its occupants’ corporate culture of flat hierarchies, multifunctional teams and open, transparent communication. In June 2009, the architecture received the BEX Award for its sustainability, innovation and efficiency. BEX (Building Exchange) is a conference program staged jointly with the World Green Building Council.
The old Unilever headquarters is undergoing sustainable revitalization by HOCHTIEF Construction on contract to Union Investment Real Estate, with the addition of a new building to create the Emporio development. This is another project where sustainability and energy efficiency are a priority. Emporio is designed to have at least 64 percent lower heating and ventilation costs than the old building, for example. Carbon emissions are to be cut by some 2,100 metric tons a year. Our PreFair contracting model provides much of the basis for attaining these ambitious
goals. Emporio was already awarded preliminary silver certification by the German Sustainable Building Council at the beginning of 2009.
The end of September 2008 brought the start of construction on HOCHTIEF Projektentwicklung’s Lindley Carrée development in downtown Hamburg. This office building likewise follows ecological principles. As a result, the sevenstory structure meets the conditions for certification under the LEED green building rating system.
The Marximum office complex developed by HOCHTIEF Development Austria similarly received GreenBuilding certification from the Austrian Energy Agency in advance of the opening day. Compelling arguments for the Energy Agency included 86 percent space efficiency and energy consumption some 25 percent below that of comparable new buildings. The complex in Vienna’s St. Marx district scored on its construction, which is so far unique to Austria. Special features include thermoactive ceilings that use heated or chilled water to provide a draft-free, dust-free airconditioned working environment for the approximately 3,000 occupants. Certification of the building makes HOCHTIEF Development Austria a new partner in the EU GreenBuilding program from June 2009.
Our subsidiary Turner Construction Company converted the corporate headquarters of office furniture makers Haworth Inc. into a green building while Haworth continued operating from the site. Despite a 20 percent increase in floor area, One Haworth Center in Holland, Michigan, uses 30 percent less energy than it did prior to renovation. The building has one of the largest modular green roofs in North America. Seventy-eight percent of captured rainwater is recycled, cutting water consumption by about a third. Ninety percent of employees have a direct outside view. Ninety-seven percent