Enrum is a listed mansion on Strandvejen in Vedbæk, Rudersdal Municipality, some 20 kilometres north of Copenhagen, Denmark. The history of the property dates back to 1831 but the current main building was built in the 1860s to a design by Johan Daniel Herholdt.
In 1731, royal cabinet secretary Georg Christian Jacobi acquired a piece of land from princess Sophia Hedwig and built a small country retreat at the site for his own use. The name Enrum is first recorded in 1733. In 1745, Jacobi sold the house to Michael Fabricius, a co-founder of the Danish Asia Company as well as Kurantbanken. After his death in 1845, his wife, Anna Maria de Longueville, increased the size of the estate through acquisition of new land. After her death in 1775, their son, Conrad Fabritius, bought out the other heirs. He built a new main building and spend considerable sums on the park. In 1778, he was ennobled under the name Fabritius de Tengnagel.
In 1805, Fabricius' widow sold Enrum to Christian Colbjørnsen, Denmark's Chief Justice since 1902. In 1811 he sold Enrum to Peder Andreas Kolderup Rosenvinge, director general of the Royal Danish Postal Services, who only owned the property until 1814. The new owner was Johan Frederik Gyldenstierne Sehested, a military officer, and after his death in 1833 the estate came under Det Sehestedske Fideikommis. a family foundation.
Enrum was in 1845 acquired by Count Christian Conrad Sophus Danneskiold-Samsøe, who also owned the Holmegård Estate at Næstved. He commissioned Johan Daniel Herholdt to design a new house which was completed in 1864. Count Danneskiold-Samsøe spent his summers on the estate where the Danish Royal Family and the Russian tsar family were among his guests. Enrum remained in the ownership of the Danneskiold-Samsøe family until 1939 when it was sold to the Independent Order of Odd Fellows. They used it as a holiday resort for their members until 1984 when it was sold once again.