Pant-yr-Ynn Mill

Pant-yr-Ynn Mill is a single-storey rubble building featuring a large waterwheel on the south side and a later two-storey addition to the north. The mill has modern slate roofs, which include a continuous skylight over the mill section and oversailing eaves. The west side of the mill has five large 30-pane windows, two of which are modern replacements. The east side is partly built against a hill, with a reduced entrance towards the south that features a chamfered 19th-century doorcase and a boarded door, topped by a large slate-stone lintel. There are two further blocked entrances to the right. A small slate-flagged yard is located at the northern part of the building. The original arched entrance to the north gable is still visible from the inside, although it is now concealed externally by the addition. This addition includes a stepped-up first-floor catslide bay with continuous modern glazing, modern multi-pane windows, and plain bargeboards on the gable end, which also has boarded entrance doors.

The external overshot waterwheel, measuring 7 meters in diameter, is powered by the Afon Du and is fed via a raised leat supported by a slightly tapering rubble pier; both the wheel and leat have been restored.

Inside the mill section, there is a suspended and boarded 19th-century pine floor. The roof consists of four bays with king-post trusses dating from around 1881. This roof supports the complete original overhead transmission shafting mechanism, which includes 16 separate wheels that were previously used to drive the machinery with belts.