The monument is a medieval tower-house, built in the later 14th century and further developed in phases during the 15th, 16th and 17th centuries. The footings of a forecourt wall and the slight traces of a defensive ditch survive to the east of the tower, together with the remains of associated garden features on the south side of the tower and a substantial level platform to the north. The tower is prominently sited 55m above sea level on top of King's Seat Hill, 300m west of the burgh of Clackmannan, with extensive views south over the Forth and north towards the Ochil Hills. The tower is a roofed and substantially complete medieval tower-house although it contains some re-instated fabric deriving from repairs that followed the collapse of a large section of the east wall in 1950. The tower-house is L-plan on form; the original 14th century building was rectangular and was heightened with a wing added in the 15th century. To the south are garden terraces and a square enclosure which was probably a bowling green. To the north and west is a substantial platform which may represent the remnants of a building platform, an outer courtyard or additional garden features. The scheduled area is irregular, as shown on the map, covering the upstanding features of the tower, associated earthwork features around the summit and an area around them within which evidence relating to the monument's construction, use and abandonment is expected to survive as shown in red on the accompanying map. The scheduling specifically excludes, but extends up to, the post and wire fences to the east of the monument, and to the west and south, it excludes the modern fences, to allow for their maintenance and upkeep. The monument was first scheduled in 1921 and amended in 1935, but inadequate area was included to recognise all of the nationally important remains: the present amendment rectifies this.

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