Ers 2016, mae Cadw wedi cwblhau pedwar cam o gynllun cadwraeth arfaethedig yn Abaty Castell-nedd. Erbyn i'r pumed cam a'r cam olaf gael ei gwblhau, amcangyfrifir y bydd bron i £1.7 miliwn wedi'i wario ar atgyfnerthu a gwarchod yr adeilad mawreddog hwn. Mae'r gwaith hwn wedi cynnwys rhoi to newydd ar is-grofft yr ystafell gysgu, sydd wedi atal llawer o ddŵr rhag mynd i mewn i'r ystafell hardd hon, un o ystafelloedd mynachaidd pwysicaf Cymru.
Since 2016, Cadw has completed four phases of planned conservation at Neath Abbey. By the time the fifth and final phase is completed, it is estimated that nearly £1.7 million will have been spent on consolidating and conserving this imposing building. This work has included ‘reroofing’ the dormitory undercroft, which has stopped significant water ingress into this beautiful room, one of the most important monastic interiors in Wales.