The re-development of King Johns Castle comprised a complete refit of the existing visitor centre at the castle and included the adjoining Castle Lane buildings, along with repair work to the towers and courtyard of the main castle building.
Visitors progress from Castle Lane into the undercroft of the visitor centre via a new stepped ramp at the exterior of the eastern side of the bastion, leading to a doorway adjacent to the northern flank of the bastion. The undercroft showcases the large archaeologically excavated area where numerous discoveries were made in 1990/1.
The highlight of the courtyard is the great hall excavation adjacent to the western curtain wall. This area has never been made accessible to the public before. A new series of steps and decking were installed bringing visitors down into the hall remains for the first time.
The great towers, (nos 1-5) that constitute the key components of the surviving fabric of the monument, are fully integrated into the scope of the project. New display material was commissioned for each of the towers. The ground floor of the visitor centre has been reserved for retail activity, including a shop and a cafe, with a terrace extending onto the courtyard side.