OVG, the Rotterdam-based developer led by Coen van Oostrom, heads this year's PropertyEU ranking of leading office developers in Europe thanks to new projects in markets outside its home country including Düsseldorf, Zaventum, Vienna and Grenoble. The bulk of the projects involve office or mixed-use developments, with the exception of a retail warehouse in Enschede that it is building for Timberland. The company is also working on two office developments in Frankfurt.