Schagerl was the son of and his wife, Rosa. After completing an apprenticeship as a carpenter from 1938 to 1941, he worked in his father's studio. That year, he was drafted into military service and returned in 1946. He then attended the
Academy of Fine Arts Vienna, where he graduated with a degree in sculpture in 1952. From 1951 to 1964, he worked on restoration of historical sights in
Vienna, including the design of a tombstone for
Gustav Klimt in 1962. As a freelance artist, he contributed to multiple
percent for art projects. Schagerl died on 12 December 2022, at the age of 99. ==Exhibitions==