 From 1909 until his death Carl Andersen operated his own architects business in Nykøbing Falster; from 1940 with his son Jørgen Friis Andersen.The business later became Arkitektfirmaet Friis Andersen A/S which still operated in the 2010s.Carl Andersen worked extensively on Lolland in the early 1900s and had many different assignments.