The castle is located on a rectangular bank west of a meadow and former seabed connected to the sea between Denmark and Sweden.
[1] Possibly a farm where Sostrup Castle now lies was owned by King Christopher II, who pawned "Svorttorp" in 1327.
The estate is first mentioned in writing in 1388, when Jens Lagesen Udsen was listed as owner, according to a parchment letter now kept in Sostrup's vault.
They are restoring the castle and plan to open a conference centre, rentable rooms and a restaurant, scheduled for completion in 2015.
Currently the castle's largest room can accommodate 60, but the owners have sought permission to open a larger great hall.