Lower Celliau

Lower Celliau is a 16th-century house with a 17th-century block attached at a right angle. The house is constructed of rubble stone with a slate roof and a brick flue. The southwest front of the 16th-century house is one-and-a-half stories high with a large, off-centre gable. Within the gable-head is a three-light diamond mullion window, originally six lights, featuring a dripstone, shallow sill, and internal shutters. On the ground floor, to the right of the off-centre entrance doorway is a 20th-century four-light window, and a 2+2+2 pane casement. To the left of the doorway is a 4+4+4 casement in a chamfered wooden frame with an angled dripstone. The north gable has four dove nesting holes in the upper gable, and below is a horizontal two-light opening with internal shutters.

The early 17th-century block is two stories high, built with thinly-coursed rubble stone. The north front features 17th-century angled dripstones with dropped and returned ends. The first floor has a small four-pane window in a chamfered wooden frame (left) and a blocked window opening (right). On the ground floor is a four-light sunk chamfer mullion with a 2+2+2+2 pane arrangement. The south garden front is rendered; the first floor has a 20th-century 4+4 pane casement, and the ground floor a segmental arched window with a 20th-century 2+2 casement in a 17th-century chamfered frame. To the right is the south gable of the 16th-century house, with a 20th-century three-light window in an old opening above and a three-light diamond mullion (angle beaded) with 2+2+2 panes (originally six lights) on the ground floor.

A fine early 17th-century entrance doorway, set back between the two houses, has a stepped head and a chamfered frame with scroll stops.

The interior is exceptionally well-preserved. The principal ground-floor room of the 16th-century house has a massive chamfered ceiling beam with truncated broach stops. A broad fireplace opening has a chamfered timber lintel, with a small triangular-headed recess carved into its face. A stone fireplace stair rises to the first floor, which is partitioned into three rooms. In the middle bay, the roof timbers are smoke blackened, indicating a former open hall. Two cruck trusses survive, with lower blades measuring 45cm at their broadest. Both trusses have yokes, and one cruck spur is visible, along with two tiers of purlins. A single-story porch links the 16th-century house to the 17th-century block, featuring three doorways with stepped door-heads and 17th-century plank and batten doors with strap hinges. The 17th-century block has a gable entry. The ground floor has chamfered ceiling beams with scroll stops and a 17th-century plank door with strap hinges leading to the fireplace stair. On the first floor are two similar stair doors and an 18th-century partition. An oak baulk winding stair leads to the attic. The attic is divided into four bays with open trusses. To the left of the gable stack is a fine, unglazed 17th-century four-light diamond mullion with roll at angles; to the right of the stack is a similar three-light window, both of which are blocked externally.