Bont Pandy mill and mill house, formerly known as Gelli-dymyll Mill.

Bont Pandy mill and mill house, formerly known as Gelli-dymyll Mill, is a three-storey structure built of rubble stone with slate roofs. There is a linking block between the mill and the house, also three storeys high, which is timber framed with five panels and brick-on-edge infilling. The ground floor on the river side features boarded doors, and there are paned timber windows throughout. The house has a gable stack at the upper end and an added stack for the workers' lodging, and it is constructed of limewashed rubble stone with slate roofs, featuring segmental headed windows and a lean-to towards the river.

The mill has a wide pit for an overshot iron waterwheel, which was removed around 1980, and it includes a stone lintelled opening at the base. Inside, a drive shaft with an approximate diameter of 200mm is supported in cast iron bearing boxes and connects to a vertical shaft supported by a heavy bridge tree. Below this, iron bevel gear is situated directly beneath a timber great spur wheel with wooden teeth, which engages two wooden 14-tooth stone nuts on either side. One quant shaft remains, which drives a pair of French burrs made by Kay & Hilton, Liverpool, in 1855. The second drive, which is missing, operated a pair of heavily worn Peak stones, possibly contributing to the mill ceasing operations. Above, a crown wheel made entirely of wood with diagonally set teeth engages a lay shaft set lengthwise in the mill, along with a wood belt pulley and another shaft with a pulley, likely for a now-gone dresser. A lever operates a form of tentering gear, and the top floor contains a horizontal drum shaft and pulley. A sack hoist trap is preserved in the adjoining bay beyond a boarded partition.