Caer Gai, including adjoining forecourt walls to the NE

Caer Gai is a medium-sized vernacular gentry house dating back to the 17th century, set behind a walled forecourt. The house is arranged in an 'H' shape, with two-and-a-half storeys and an asymmetrical facade. The central entrance is recessed between two flanking gabled wings, the right-hand wing being broader than the left. The building is constructed from local slatestone rubble, with a renewed slate roof and slated verges. The facade exhibits a symmetrical arrangement of windows, featuring modern two-light leaded casement windows in wooden frames, set in pairs across the six-window front. The attic floor has single windows in the gable apexes of the outer wings, and a pair of windows within a large central gabled dormer. Slatestone lintels and projecting slate sills are present throughout.

The central section features a segmentally-arched entrance with rough-dressed slatestone voussoirs, a slatestone label supported on end brackets, and a modern boarded and studded door. Above the entrance is an inset plaque with a Welsh inscription, made of reused brown sandstone, likely Roman in origin. Further inscribed stones, of similar material, are positioned to the left and right of the entrance, at eaves height flanking the dormer windows, and between the floors of the left-hand wing, bearing inscriptions in Latin and Welsh.

The right-hand wing has a flush lateral chimney with a boarded door and a large 19th-century tripartite window of nine panes; two leaded windows are located above. The left-hand side has a modern boarded and studded door, as well as two- and three-light leaded windows. The rear elevation is rendered, featuring a squat 19th-century end chimney on the left wing, and a large two-stage chimney on the right wing with a catslide roof extending from the main rear roof pitch. A large, unrendered lean-to is attached to the left gable end, with a slated roof.

The entrance facade is fronted by a contemporary square forecourt. The uncoped rubble walls originally stood approximately 1.8 metres high on the north-west side (right) and have been reduced to around 1 metre on the north-east and south-east sides. A modern iron gate is located in the north-east corner. The north-west wall abuts the house flush, while the south-east wall turns at a right angle immediately beyond the left-hand cross-wing, enclosing a smaller yard on that wing’s south-east side.

The forecourt walls are of rubble construction with a slated roof and stone stacks. The house exhibits two slightly projecting wings and a central gable. An internal inspection was not possible.