Scavenius inherited Gjorslev and the other estates on Stevns upon his mother's death in 1825. He purchased Klintholm Manor on Møn from his younger brother in 1926. He purchased Petersgaard at VordingborgKnight in the Order of the Dannebrog in 1945 and a Commander in the [Order of the Dannebrog">Order of the Dannebrog">Knight in the Order of the Dannebrog in 1945 and a Commander in the [Order of the Dannebrog in 1854.
Politics and public offices
Scavenius was in June 1837 elected as one of 15 board members of a committee that worked for the creation of the Thorvaldsen Museum in Copenhagen. He was for a while president of Præstø Amts Landøkonomiske Forening and a member of Præstø County Council in 1842–54. He instigated the construction of Rødvig Harbour9. He was a member of Roskilde Constituent Assembly in 1835– 48 and was later appointed by the king for the Danish Constituent Asscembly in 1848–49. He was a defensor of the estate owners' rights, arguing in favour of a model which only converted half of all copyholds into freeholds while the other half should remain in the free ownership of estate owners. He opposed the idea of a free constitution, arguing in favour of keeping kongeloven in a modified form and describing the king's position in the new constitution as "an automat......a decorated Puppet which for festive occasions could be displayed in Processions for the amusement of the public". Scavenius' proposal was only supported by six votes. He was not elected for the new rigsdag but was appointed for rigsrådet by the king in 1854–59. He was one of the founders of the October Association in 1865.
Personal life
Scavenius married Charlotte Sophie Meincke on 12 May 1837 in the Church of Our Lady in Copenhagen. She was a daughter of military prosecutor Carl Henrik Lydius Meincke and Anna Elisabeth Dorothea Falck. He was the father of Jacob Scavenius. Scavenius was an amateur astronomer and the owner of an extensive collection of maps and books. He died on 4 December 1868 and is buried at Holtug Cemetery. His eldest son Jacob Scavenius inherited Ghorslev, his second son Carl Scavenius inherited Klintholm and the youngest son inherited Petersgaard. Klintholm is still owned by the family.