Ashdown House, Pavilion Approximately 20 Metres North East

Ashdown House Pavilion, located approximately 20 metres northeast of Ashdown House, was built around 1662. It features imitation stone render with limestone dressings and quoins, and has a stone slate roof with limestone stacks. The original five-by-one bay plan has been significantly altered and is not clearly visible. The pavilion is one and a half storeys high with a five-window range.

The front elevation facing Ashdown House includes a central six-panelled late 19th-century door framed by a limestone eared architrave, a semi-circular arch with a raised key, and a decorative fanlight. It has four-light wood-mullioned and transomed casements with 20th-century plate glass and limestone eared architraves, along with four gabled dormers featuring moulded cornices and 20th-century casements.

The rear elevation mirrors the front with similar windows in a five-window layout and three raised central dormers. The south gable end has a blind door with a limestone eared architrave, a pulvinated frieze, and a moulded cornice. Additional architectural details include a moulded plinth, raised and chamfered quoins, a dentilled wood cornice, and a hipped roof topped with a bell cupola, along with end stacks that have moulded caps.

The interior has been gutted by fire and was converted into housekeeper's accommodation in the mid-20th century.