Timpendean Tower, formerly known as Typenden Castle, is a ruined 15th-century tower house near Lanton, approximately 1.5 miles (2.4 km) north-west of Jedburgh in the Scottish Borders.
Located on elevated ground between the River Teviot and the Jed Water, the structure is a simple tower measuring 29 by 24 feet with 4-foot-thick (1.2 m) walls. Formerly a Douglas family stronghold, it is now a scheduled monument.
The tower stands among much older earthworks and once had three floors and a vaulted cellar. Projecting bond stones on two walls suggest there was once an addition, but it is now gone. The east door and basement fireplace were added after the original house was built.
The great hall was on the first floor, and the sleeping quarters were on the second. A circular staircase on the east wall connected these floors. Part of the nearby earthworks was dammed and filled with water to help defend the tower.