An archaeological investigation of the foundations of the standing remains of the palace was carried out by Graham Hayman of SCAU for Woking Borough Council. Detailed information on the state of the foundations was needed as part of a programme of repair and conservation of the remains. The work indicated there is a complex stratigraphy indicating various building stages preserved on the site. The foundations of the present walls were built to a substantial depth and appeared in good condition. The foundations were made of a variety of materials including brick, chalk blocks and flint