Cat's Ash Farmhouse (incorporating remains of St Curig's chapel)

Cat's Ash Farmhouse, dated 1604, is a substantial farmhouse that includes the remains of the Medieval chapel of St Curig. The building is two-and-a-half storeys tall and features an attached barn. It has a steeply pitched slate roof with three chimneys, two on the gables and one axial, all of which have been rebuilt in yellow brick. The garden elevation on the west side of the main range was refaced in the late 18th century or early 19th century and has three windows, featuring sixteen-pane, hornless sashes on the ground and first floors, and small six-pane sashes in the attic, all symmetrically aligned. The doorway is offset to the left side and has a date stone above it that reads "John Thomas 1604."

At the south end, the main range steps down to a one-and-a-half storey section that connects to the remains of the chapel. The chapel has rubble elevations and a slated roof and has been significantly modified, now incorporated into a barn, likely from the 18th century. The only remaining feature of the chapel is a blocked, pointed window on the west gable end, which has stone, chamfered jambs and an arched dripmould. The rear, or east elevation, includes a three-storey stair outshut at the north end with 19th-century casements, and there is a large modern two-storey lean-to on the southern elevation.

Inside, there are few exposed features, although the building remains largely unmodernised. The ground and first floors retain large ceiling beams with medium chamfers and leaf stops. The northern cell is partitioned, and a timber spiral stair within the outshut rises to the attic. There is a moulded, round-headed early doorframe at the base of the stair. It is understood that the kitchen fire on the northern gable remains intact, complete with a range, although it is blocked. The axial stack fire is blocked at the ground floor but retains a stone cross-slab spiral stair, visible at the first floor level. The first floor and attic feature broad oak floorboards, and the original pegged and trussed "A" frame roof is still present.