Wessex Archaeology was commissioned by English Heritage to carry out an archaeological watching brief and recording work of conservation works at Portchester Castle and Bishop's Waltham Palace. The purpose of the watching and recording brief was to comply with a condition of the Scheduled Monument Consent. English Heritage wrote the Written Scheme of Investigation for the watching and recording brief, which included specifications of the proposed conservation work and methodology required for the archaeological work. An archaeologist was required to monitor opening-up or dismantling work and the other areas subject to conservation were inspected and recorded over the course of the site visits. In general, recording comprised inspection and photography of the areas subject to conservation while scaffolding was still in-situ. Where opening up or dismantling work exposed historic fabric, these areas were recorded to provide further information. Discussion with English Heritage at the initial site visit agreed the specifics as to which features would form part of the drawn record. Conservation work was carried out in the brewhouse/bakehouse range, the kitchen and to the 12th century doorway towards the southwest corner of the site. In addition, the cross wall will require conservation at a later date and this was inspected and photographed as part of the record. The two sites, Portchester Castle and Bishop's Waltham Palace, were monitored and recorded over several visits during February and March 2015.