The document summarizes key lessons learned from a study tour of new developments in Amsterdam and Rotterdam. In Amsterdam, high-density new housing has doubled the population while maintaining quality street surfaces. Simple construction and complex facades have reduced costs. Balconies attract families while social housing caters to a range of households. In Vathorst, Amersfoort, connectivity and mixed uses were prioritized from the beginning. A diversity of builders, housing types, and community facilities help create a vibrant, appealing place. In Rotterdam, redeveloping former docklands with iconic architecture and cultural attractions has transformed the city's image.