With a market share of over 80 per cent for new commercial properties and more than 60 per cent of the overall market, the German Sustainable Building Council (DGNB) is the undisputed market leader in the German commercial property segment, well ahead of other certification systems. This was the conclusion of the latest market report issued by BNP Paribas Real Estate – Market Focus: Green Buildings 2017. Hermann Horster, Head of Sustainability at BNP Paribas Real Estate, answered our questions about the role played by certified buildings in the investment market, also covering a variety of other issues.