New Abbey Corn Mill, Mill House (including launder and by-pass channel)

New Abbey Corn Mill is a Grade A listed corn mill complex dating primarily to the late 18th century, with 19th century alterations. The complex comprises a large mill building with waterwheel, kiln, dwelling, related machinery, mill pond with dam, fish pond and lades.

The mill building was constructed in phases during the late 18th century and was restored in 1982. It remains in working order. The structure comprises two adjoining rectangular-plan blocks sharing a common gable, constructed of lime-washed rubble.

The north block is two storeys, lower and narrower than the south block, with a lean-to in the re-entrant angle to the west. The north end houses former domestic accommodation for the miller, now converted to property manager's office, visitor reception and exhibition spaces (2017). The northeast angle is curved to the roadside at ground level, and there is a long lean-to section against the west wall. The north block also houses the kiln, which was used to dry grain before milling. The principal south range is three storeys with a loft above.

Ground level features an east-facing door with a small-paned fanlight. A further door is positioned off-centre left at first floor level. The building has predominantly timber fixed-pane windows of various sizes throughout. Some openings have fixed panes with top hoppers, and there are some 12-pane timber sash and case windows, predominantly on the east elevation. Both blocks have roofs with straight stone skews covered with graded slates. Stone ridge copes run along both blocks, with brick ridge apex stacks. The north block has a tall ventilator with a fish weathervane indicator positioned above the kiln. Ball finials sit at the gable ends of the south block.

The mill lade is carried on a rubble embankment to an iron overshot wheel on the west wall. The water-wheel has conventional construction with cast-iron rings and hubs, wooden axle, buckets and spokes. It unusually features nine spokes rather than the typical eight or ten. The wheel is of pitchback type, turning towards the flow of water. Water is drawn from the mill pond along a timber trough, or launder, to the wheel.

The interior survives intact with all machinery renovated during the 1982 restoration. The loft was used for storage and to feed hoppers leading grain to the stone floor, which contains three pairs of grinding stones and a shaking sieve. The ground floor houses machinery transmitting power from the water supply to the grinding machinery above, together with ancillary processing machinery. The kiln room contains a floor of perforated cast iron plates supported on wrought iron bearers above a brick funnel, with steel roof trusses and a circular-section ventilator.

Associated structures include the mill pond with dam, lade, sluices and fish pond to the west, originally fed via a lade from nearby Loch Kindar. The sluices have granite boulder retaining walls.

The car park to the west of the corn mill and disused curling pond to the west of the Loch Kindar lade are excluded from the listing.