Gatehouse at Cors y Gedol Hall

This is an early 17th century, symmetrically planned gatehouse, constructed without defensive features. It is built of rubble masonry with long stones, incorporating sandstone dressings. The roof is slate, with stone parapet copings and raised ball finials. A cross-gabled roof covers the central block, featuring stone stacks and a timber bellcote capped with a pyramid slate roof and a weathercock.

The central three-storey block is flanked by two-storey wings. Each wing's ground floor features a wide, segmental archway with dressed sandstone voussoirs and jambs, incorporating quarter round and hollow mouldings. The apex of the arch is marked by a facetted keystone bearing the date 1630, the initials W A V, and a wheel shape on one facet. Above the arch is a mullioned window featuring three round-headed lights beneath a pointed hoodmould. The upper storey contains a single-handed clock face, also with a pointed hoodmould. Crude gargoyles in the form of human faces are positioned at each corner of the roof.

The two-storey flanking wings have first-floor windows within gabled dormers, each housing a three-light mullioned window with plain heads. The south elevation lacks ground floor windows, while the north side exhibits paired two-light mullioned windows flanking the arch; each gable has a single window in the apex. All windows share quarter round mouldings.

An interior survey recorded by Smith in the mid-20th century revealed a single room on either side of the passage on the ground floor. These rooms feature ceiling beams with quarter round mouldings continued at the stops, and joists with plain chamfers and lamb's tongue stops. The first floor comprises three rooms, one within the tower, and one to either side. Each of the side rooms contained a stone fireplace with crudely proportioned classical ornament including pilaster-supported shelves. The architraves displayed motifs in the form of a cross saltire, the heraldic device of the Vaughan family. The overmantel in the east room features two blank shields of arms with moulded pilasters on either side.