Llaneglwys Isaf including attached barn to left

The property comprises a house with an attached barn, situated in a linear arrangement alongside an uphill barn. The farmhouse is constructed of painted rubble stone with a slate roof, while the barn has a corrugated iron roof. The farmhouse presents a two-storey, three-window facade offset to the right. It features stone end stacks with dripstones and projecting caps built in two courses. The windows are casement types with timber lintels; the upper windows are placed under the eaves, and the lower windows have thin stone hoodmoulds. A contemporary door replaces the original, and a small square window is situated to its left. The lintel above the door has been ornamented with a repeated semi-circular design. The right end wall has similar windows with hoodmoulds, one to the ground floor and two to the first floor, alongside two square four-pane attic lights with timber lintels. The base of the farmhouse is battered. The attached barn has full-height double doors, a cart-entry with a timber lintel to the left, and two 20th-century windows to the right.

The rear of the house is rendered, with irregularly placed windows and a scullery projection. The rear wall of the barn has a boarded-over opening, and the wall is unrendered to the right.

The interior of the house, as described in 1992, has a broad central lobby with a hall to the left and a parlour to the right, with a rear staircase. It features chamfered beams, some with stepped hollow stops and others more roughly hewn. The dog-leg staircase has moulded undercut rails, turned balusters, and square newels. A formerly broad window illuminating the staircase has been blocked. The lower flight of the staircase has been repositioned to the northwest corner of the hall, and the upper flights are blocked and visible only from the attic. While the staircase appears to be of a single date, joist sockets in the beams alongside the stair head suggest a removed floor or the reuse of beams. Rooms have deeply splayed window openings and chimney breasts, though fireplaces have been altered or blocked. The hall retains a remnant, on the front wall, of a good plaster moulded cornice. Inserted doorways provide access to the barn. The attic contains a largely 17th-century five-bay roof with pegged collar trusses and lapped purlins, with closed trusses on each side of the staircase; the rafters are mostly replaced.

The interior of the barn is considerably altered but retains 18th-century trusses with overlapping triple purlins.