Tredean

In the early 20th century the Dukes of Beaufort sold off their extensive Monmouthshire estates, centred on Troy House. The site of Tredean was purchased by a Mr Henry Simpson, who began the construction of a large house in the Arts and Crafts style. In 2022 the house, renamed Devauden Manor, was again for sale, with a guide price of £3.5M. The house cannot be seen from the road, although the lodge, also in private ownership and with its own Grade II listing, and which the architectural historian John Newman considered "pert", gives a flavour of the house's style.

John Newman describes Tredean as "a large and ambitious house in a loose Voyseyesque style". Cadw records its terraced setting, on the side of a steep hill, "two-storey and-attic with a full basement due to the artificial ground level". and the teahouse in the garden, all having their own Grade II listings. Coflein records that the house is "almost unaltered" since its construction. The rooms in the house include a panelled entrance hall with stained glass, a dining room and sitting room with some reproduction fittings in the original style, a billiard room and a bathroom of 1902 with its "tiling and sanitary ware all complete".