Castle Bourne with Attached Folly and Adjoining Wall

Castle Bourne is a late 18th-century folly with a mid-19th-century house and adjoining wall, with later 20th-century additions. The folly and house are constructed of rendered brick with slate roofs concealed behind embattled parapets. The main house has a square, two-bay design with octagonal corner turrets that form chimneys, featuring pointed-arched narrow panels decorating the caps. A single-bay south porch wing is also present. The house has two storeys, a basement, and an attic with dormers. A string course runs at main storey levels, continuing around the turrets. The architectural style is Gothick.

The south elevation features two ground-floor bay windows with moulded cornices, and two first-floor four-light windows where the lights have pointed heads and cornices interrupting the upper string. A blind circular opening with a moulded surround sits between the windows. There are two gabled dormers with scalloped bargeboards and lancet windows. The porch wing has similar corner turrets, and its south elevation features a moulded flat canopy with an embattled parapet supported by two octagonal columns. It has half-glazed double doors and a transom light with leaded glass; above the doors is a first-floor circular window with leaded glass and a moulded surround. On the right side of the house, in the angle with the porch wing, is a three-light window with pointed heads on both floors.

The interior includes 19th-century moulded plaster ceilings in the main rooms and a dog-leg staircase with large turned balusters. The folly itself is square with a three-bay plan, its outer bays being formed by large circular corner towers, two storeys in height. The south elevation of the folly has pointed windows on the ground floor, some of which are blind, and quatrefoil windows with relief mouldings in the form of Maltese crosses above, on the first floor. The central bay of the folly has a blocked pointed doorway with a hood mould and returns, and a blind pointed first-floor window.

The adjoining wall links the house to the folly extending approximately 20 yards in length and standing 15 feet high, with an embattled parapet above a moulded cornice. It includes a central archway with a four-centred head, flanked by pointed archways, all with hood moulds and returns; the right archway has a 20th-century inserted half-glazed door leading to a rear addition. A large 20th-century addition to the left side of the house is single-storey and features four large four-light windows and a design similar to the main house. A similar folly exists approximately 150 yards south of Clent Grove, Clent CP.