Langton House is a Grade II* Listed house located on the eastern side of New Alresford. The main body of the building dates from c.1760-80, with a particularly fine north façade built in blue headers with red dressings. The house was enlarged c.1820 with the creation of a new drawing room, bedrooms and nurseries, and a further phase of enlargement took place in the 1880’s when a morning room was added to the house. Originally, there was also an eighteenth century kitchen wing to the southwest. However, various parts of the house were either demolished or altered in the 1930’s, including the morning room, kitchen wing, and two storeys above the drawing room. As a result, the house as a whole had become unbalanced and incoherent.

George Saumarez Smith undertook extensive research into the history and development of the house, enabling the new designs to echo the original composition and restore a sense of balance to the building. The designs involved the reconstruction of an upper storey over the eastern drawing room, and a matching wing to the west, to create a strong sense of symmetry to the south façade of the house. Each wing has a simply detailed pediment in the spirit of the Regency alterations to the house, with a Tuscan modillion cornice. A new library has also been created on the site of the original Victorian morning room, with a mansard roof to match the existing roofline on the east side of the main front.