Gloddaeth Hall is a large country house in Llandudno, Conwy, Wales. It is a Grade I listed building.[1] It stands on land which had been owned by the Mostyn family since the 15th century. The oldest part of the hall dates back to the mid or early 16th century and a wing to the east was added around 1700.[1]
In the 19th century further additions were made to the building by William E. Nesfield,[1] and by John Douglas, who designed a new west wing for Lady Augusta Mostyn in 1889.[2] The hall now forms part of St David's College.[1]