In 1911, he first went on a study trip to Paris and in 1913 to Provence. Werenskiold had further study in France from 1920 to 1923. Dagfin Werenskiold made several relief works, including the bronze doors of the Oslo Cathedral in 1937 with scenes from the Sermon on the Mount.
He also made decorations at Saint Olaf College in Northfield, Minnesota and altarpieces for Hornindal Church at Hornindal in Sogn og Fjordane County and Sandefjord Church at Sandefjord in Vestfold county.
Among his works are the painting Jørgen Tjønnstaul in the National Gallery of Norway, a head sculpture of Fridtjof Nansen, and Yggdrasilfrisen in Oslo City Hall. He illustrated the 1939 edition of Nordahl Rolfsen"s readers, and editions of Norwegian fairytales.