Summerhouse Approximately 120 Metres South-West of Wood House

Summerhouse, built between 1899 and 1905 by Thomas Mawson, as part of a landscaping scheme associated with the rebuilding of Wood House. The structure is largely constructed of roughcast granite stone rubble laid to irregular courses, with dressed granite quoins and granite ashlar detailing; the roof is of Cotswold stone slabs. The summerhouse is built on a hillside, facing Wood House to the northeast.

The plan consists of a single room with a right-hand stack and a bay window to the left, built at right angles to the rear of an arcade with a semi-circular roof. The end bays were likely always enclosed, but were converted into service rooms in the 17th century.

The curving arcade is supported by a series of turned, monolithic granite Tuscan posts; the outer end bays are defined by square section posts and infilled with 20th-century walls. Each end wall is granite and contains a round-headed niche with an eared architrave. The roof is hipped at each end and has a decorated lead gutter. At the rear, pairs of posts stand in front of the doorway to the summerhouse room. The bay window is granite-mullioned, in a style complementing Wood House, and features rectangular panes of leaded glass.

The interior is finished to a high standard, similarly to the main house. The granite ashlar fireplace has a cable-moulded surround, as do the two round-headed alcoves of the granite chimneypiece. A Latin inscription is carved into the lintel. The room is lined with fielded panel oak wainscotting, above which are panels with moulded plaster architraves. A coved plaster cornice and ornamental plasterwork in a Jacobean vernacular style decorate the ceiling of the bay.

Thomas Mawson considered the entire landscaping scheme, including the summerhouse, as a significant achievement.