Windmill Lodge, with the Gateway Adjoining in the Grounds of Eridge Castle

Windmill Lodge, located within the grounds of Eridge Castle, is an early 19th-century building, likely designed around 1825 by architect John Montier of Tunbridge Wells. This L-shaped structure features two storeys and two windows. The ground floor is constructed of stone, while the upper level has imitation timbering adorned with elaborate decorative plasterwork. It has a tiled roof with gable ends on each wing, showcasing intricately carved bargeboards. The windows are of the casement type.

At the angle of the L, there is a castellated porch. To the north-west of the Lodge, there is a pair of rectangular rusticated stone gate-piers, positioned diagonally, topped with bull's heads representing the Abergavenny arms rising from coronets. These gate-piers flank the carriage drive, and smaller gate-piers with ball caps are located on each side of the carriage drive for pedestrian entrances. The gate-piers are likely of a later date than the Lodge itself.