A third player (next to Schunck and Peutz) who made this sort of building possible was the then mayor Marcel van Grunsven, who wanted to modernise Heerlen in avangardist fashion, thus ensuring the required permits were no problem, despite the fact that the local planning board had opposed precisely the innovative aspects of the design. But the City council gave the go ahead, apart from a few minor points. The job was given to Maastrichtse Betonijzerbouw (reinforced concrete builder) P. Knols, who had made the lowest bid at 184,500 guilders.