To strive for sustainablity has become common sense. Sustainablity in architecture goes beyond what regulations require and what construction technology offers. There exists something like an aesthetic sustainability, a sense of beauty beyond the fashion of the day. HvdH designs not just buildings which weather gracefully, which allow for diverging sorts of use and which are expandable and changeable, but designs sustainable urban environments. HvdH believes in longevity defined at the scale of the city.