Hafodunos Hall (Welsh: Plasty Hafodunos) is a Gothic revival house located near the village of Llangernyw in Wales. Designed by Sir George Gilbert Scott, it was built between 1861 and 1866 for Henry Robertson Sandbach, replacing a house that had been built in 1674. The house, of Venetian-Gothic design, is considered Scott's second-most important country house after Kelham Hall, Nottinghamshire and arguably his most important Welsh building. Subject to a devastating fire in 2004, the ruins are being restored. The Hall is a Grade I listed building, with many of the buildings and structures in the grounds having their own listings.