The Keep is in diameter with a square, spurred base; in the 13th century there would have been an adjacent turret, on the south-west side, containing latrines, but few traces remain. There is no evidence that the tower that Burges termed a keep would have fulfilled this function in the medieval period and he appears to have chosen the name because of his initial decision to locate the bedrooms of Lord and Lady Bute in the rebuilt tower. The Kitchen Tower is also across and rests on a square, spurred base. It was originally two storeys high and contained the medieval kitchen; Burgess raised its height and gave it a conical roof and chimneys. The walls of these two towers are around thick at the base, thinning to at the top. The Well Tower at in diameter is slightly narrower than the Keep or Kitchen Tower, with a well in its lowest chamber sunk into the ground. The Well Tower lacks the spurs of the other two towers and has a flat rather than curved back, facing onto the courtyard, similar to some of the towers built at Caerphilly by the de Clares.