Nantyreglwys

Nantyreglwys is a mid-19th century L-plan house constructed of whitewashed rubble stone, originally stuccoed, with slate roofs. The roof verges overhang, although they appear to have been trimmed back from their original extent, and feature 20th-century bargeboards. The windows are timber, with two and three lights, possessing depressed arches over the lights and small panes. The upper windows have hoodmoulds, while the ground floor windows have brick surrounds which were revealed when the stucco was removed, with stone voussoirs clearly visible.

The front elevation comprises a two-bay main range and a projecting wing to the left, featuring a whitewashed brick chimney on its side wall. The main range has two-light windows above and a ground-floor slate-roofed veranda extending over the front door and a full-length three-light window with a hoodmould. The doorcase is pilastered, with panelled reveals framing double Tudor-style doors, featuring a depressed arched head and a narrow overlight. The wing to the left has no windows to its side, only a small attic light in its gable end, a two-light window on the first floor and a full-length three-light window on the ground floor. The garden side of the wing mirrors this arrangement with a range of two windows, notable for its long two-light ground floor windows, all with hoodmoulds. The roof is close-eaved and hipped at the rear angle. The veranda may have originally extended along the side of the wing, as evidenced by matching slate paving to the remaining section. It is supported by cast concrete posts.

The right-hand gable end of the main range still retains projecting verges to their original depth, edged with fretted bargeboards. Fenestration is similar to the other gable end, with a two-light ground-floor window. A brick wall-face stack is present on the rear wall.

Set back and adjoining the main house is the rendered gable end of a range predating 1854. The facade of this earlier range is largely obscured by the later construction. It features a nogged brick end stack, a twelve-pane sash window on each floor, and a rear outshut with a 20th-century window and a twelve-pane sash in the end wall. The other end shows no chimney, only four-pane sash windows on each floor. An attached outbuilding, characterized by a short front roof pitch and a longer rear roof pitch, has two small upper windows and two rear doors.

Inside, the entrance hall contains an open-well staircase, considered contemporary but reportedly replacing an original staircase removed in the 1970s. The staircase consists of two flights at right angles, with stick balusters and a moulded rail that terminates in a spiral. The underside of the landing has a moulded cornice and a spiral-acanthus rose. The principal rooms retain original elaborate moulded cornices and 20th-century fireplaces. The drawing room features depressed-arched recesses on either side of the fireplace and a broad recess on the end wall. Further features include six-panel doors within panelled reveals and panelled shutters.