The Argoed, Penallt, Monmouthshire, Wales, is a Victorian country house dating from the 1860s, with earlier origins from the late 16th and early 17th centuries. It is a Grade II* listed building and the garden is listed on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales. The English meaning of the Welsh word argoed is 'by a wood'.

In the 17th century the house was the home of the Proberts, local landowners, members of parliament and High Sheriffs of Monmouthshire.^[a][2] Richard Potter, Chairman of the Great Western Railway and father of Beatrice Webb, bought the house in 1865 and undertook extensive rebuilding.^[3] Beatrice Webb was a founder member of the Fabian Society and, in the later 19th and early 20th centuries, she entertained many prominent friends at the Argoed, including George Bernard Shaw.^[4] Shaw is rumoured to have written his plays The Man of Destiny and Mrs. Warren's Profession whilst staying at the house.^[5] In the 1980s, the Argoed was owned by Robert Plant of the rock band Led Zeppelin.^[3]

The architectural historian John Newman describes the Argoed as "a large, two-storeyed stone house (and) a tantalizing one."^[6] The central block is original and irregular, its "windows all 18th century sashes."^[6] Potter's re-building included a larger block to the south and a service wing to the north.^[6] The interior has been greatly reconstructed. The grounds are largely from the 19th and 20th centuries, though they include "17th century terraces of potential archaeological interest."^[4] The triangular plot has gardens which include wide gravel drives, formal lawns, terraces and ha-has which look out over the Wye valley.^[4] The gardens are listed at Grade II on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales^[7] and are recorded by the RCAHMW on their Coflein database.^[8]

• Newman, John (2000). Gwent/Monmouthshire. The Buildings of Wales. Penguin. ISBN 0140710531.