Originally known as Maesruddud, the present house was built in two phases by E.P. Warren, architect of London and pupil of G.F. Bodley. The earlier phase was built in 1900 as an addition to an earlier house, whose archaeological potential is significant, and was extended in 1907 (dates on building) when the original house was demolished. The earlier phase of the present house was built for Captain Edmund Williams, local mine owner and Sheriff of Monmouthshire. The second phase was added for L. Brewer Williams and was conceived in collaboration with Thomas Mawson, who designed the garden, when a number of ancillary buildings were added to the grounds.