Summerhouse About 120 Metres South West of Hinchingbrooke House

The summerhouse, located about 120 metres south west of Hinchingbrooke House, dates from the mid 19th century. It is constructed of gault brick with red brick dressings and features a fishscale tile roof adorned with crested ridge tiles and ornate pierced bargeboards at the gable ends, topped with spike finials. The building has a small single-cell rectangular plan, with an entrance and porch on the northwest end, a stack on the southeast end, and a bay window on the southwest side.

The exterior is a single storey. The northwest gable end includes a central doorway with a plank door that has cover moulds, and an open wooden porch featuring ornate pierced bargeboards, a pendant, and a finial at the gable. This is flanked by small 1-light casements that were formerly fitted with diamond panes. The southwest side has a canted bay window at the centre, which has a coved eaves cornice and a hipped roof. Above the bay window is a small gable with pierced bargeboards and a finial, which contains a coronet and the initials MS, believed to refer to Mary Montague, the daughter of the Earl of Sandwich. The southeast gable end features a large brick stack with set offs, while the rear northeast wall is blind.

Inside, there is a boarded ceiling supported by pierced arch braces. It is suggested that this summerhouse may have been built in memory of Mary Montague, who lived from 1812 to 1839.