Ty Brethyn

3 storeyed, 4 window range. Largely whitewashed rubble, with some brick infill to top left; slate hanging to each gable apex; later brick outshut along rear. 2 iron brace plates, one with fan-like decoration. Slate roof, with overhanging eaves and later C19 brick chimneys on left hand gable and at centre. The central stack marks a significant division of the building, with the former mill section to the right, and a domestic section to its left, though this functional division may be a result of later C19 modification. Lofted single storeyed broad gabled stable, advanced from right hand section, with outer doors and small central window, with loft opening above. All the detail has been changed since the building was first listed in1989, though using the original openings. In 1989, the mill section of the building was more clearly defined by 12 pane fixed windows of industrial character at first floor: these have now been replaced with timber casements. Large overshot cast-iron water wheel survives (in poor condition) against right-hand gable, partially contained in brick lean-to now roofless. The wheel was fed from a leat which is still visible at the rear of the building. Tall camber headed doorway in right-hand gable was formerly approached by a ramp, but now steps. It provides access to the mill area. Domestic section to left is a 2 window range, with near-central doorway. The door and window immediately to its left appear to be inserted into what may have been a wider original opening, though windows do all align. The 3-light wooden casements described in 1989 have all been replaced with 2-light UPVC windows , albeit in the earlier openings, with brick sills.

The building is divided between the former mill and a domestic section; internal detail in the domestic section suggests a late C19 date, perhaps indicating remodelling at that time. Mill section layout largely obscured by modern alterations, though cast iron pit wheel survives alongside right-hand gable end