The firm that later became npk design first saw the light of day in an attic room in Delft in 1978. By 1983, so many people were working with the office that premises were purchased on the Molslaan in Delft. The office continued to expand and moved to a historical building in Leiden in 1990. The growth in the staff also enabled an expansion of the services offered. In 1996, npk opened a branch in Hamburg.