 There is documentary evidence describing the castle as having "outer and inner bailies and that the buildings included the constable’s house (on the high ground of King Square), a chapel (St Marks), hall (Mortemere’s Hall) and chamber, stables, kitchens, horse mill and gatehouse as well as a bell tower and dovecote.A thick portion of the castle wall and water gate, which are grade II* listed can still be seen on West Quay, and the remains of a wall of a building that was probably built within the castle can be viewed in Queen Street, and the garden of Lions House.The foundations of the tower forming the north-east corner of the castle are buried beneath Homecastle House.