Ty'n-y-Caeau including adjoining Agricultural Range

This is a farmhouse and adjoining agricultural range, forming a roughly T-shaped complex, dating from the late 17th and 18th centuries. The buildings are of roughly-dressed limestone, with the main facades whitened, and have slate roofs.

The main farmhouse is a T-plan building, consisting of a two-storey, three-bay primary range with a lower cross-range adjoining to the right. The primary range has a rendered facade and a colour-washed left gable end, with stone end chimneys. A plain, modern rendered brick porch with an open front provides central access to the farmhouse, leading to a modern panelled door. Flanking the porch are tripartite windows on both floors; those on the ground floor have cambered lintels with rough-dressed voussoirs, and those on the first floor are under the eaves. Most windows retain their original three-light leaded glazing with pegged wooden mullions, except the ground-floor window on the left, which has plain glazing. A two-light leaded window is located above the porch. The rear of this range has three further, similar windows, two with cambered lintels, one with plain glazing.

The lower cross-wing has a longer section projecting to the front and a shorter rear section connecting the house with the agricultural range. The front section has end and central chimneys. The south-east (forecourt) side has a three-part casement window with six-pane sections on the ground floor; modern uPVC windows are present on both floors to the left. The north-west (farmyard) side has a central catslide outshut with a uPVC replacement window and a boarded entrance to the front, via an extruded porch block with a corrugated iron roof. Two further two-part casement windows are present on both floors to the right of the outshut; casement sections are boarded and include two-pane, four-pane, plain-glazed, and small-pane windows. A blocked, camber-headed entrance, stepped-up, is in the corner between the house and the agricultural range. A single rooflight is located at the rear.

The two-storey agricultural range adjoins the farmhouse to the north-west. The left-hand section is a barn with opposing barn entrances at the centre, each with a cambered head. Ventilation slits are visible on both long sides and arranged in four tiers on the south-east gable end. To the right of the barn, an external stone stair ascends to an upper hayloft, accessible via a boarded first-floor door with a pegged frame. The hayloft has two square openings with boarded shutters; the ground floor below is occupied by two large, segmentally-arched cart bays. Beyond this are three stable entrances of diminishing heights, the outer ones with segmental arches, and boarded doors. Three boarded openings are present under the eaves, as before, with another at the far right above a wide cart bay, having an expressed timber lintel.

Inside the farmhouse, the former hall section (to the right of the entrance) has exposed ceiling beams with simple run-out chamfered detail. The barn section has four bays and retains its primary queen post trusses.