In 1931, Williams-Ellis bought a Victorian mansion from his uncle Sir Osmund Williams, Bt. It was called Castell Deudraeth. Williams-Ellis planned on having the mansion be a part of the hotel. Lots of problems and the war did not allow that to happen. Williams-Ellis loved the building a lot and did anything he could to make it a part of the hotel. He received money from the Heritage Lottery Fund, the European Regional Development Fund, and Wales Tourist Board. This money allowed him to finally open Castell Deudraeth as a hotel with 11 bedrooms and a restaurant on August 20, 2001. Bryn Terfel performed at the opening.