Abercynrig Mill is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 July 2005. Watermill.

Abercynrig Mill

WRENN ID
fossil-vestry-wax
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
28 July 2005
Type
Watermill
Address
Abercynrig Mill, Llanfrynach, Powys
OS grid reference
SO 067 265
Coordinates
51.92985, -3.35743
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Abercynrig Mill is a water-mill and house built from whitewashed rubble stone, topped with modern plain tiles. The building is two storeys high and has an L-shaped plan. The house section features a double-fronted design with large square 15-pane windows of the Brecon hopper type. The upper windows are positioned under the eaves, while the lower ones have oak lintels. There is a board door, also with a timber lintel, flanked by the windows. The left window shows straight joints where a former door was located. To the extreme left, at the angle of the mill, there is a narrow 6-pane window. On the extreme right, a cast iron Victorian letterbox is present. A stone square chimney is located on the right end, and the roughcast right end gable covers a large lean-to made of whitewashed rubble, which features a cambered-headed small 4-pane window on the first floor with a brick head, and a boarded door in the angle to the main house.

The mill section to the left is positioned at right angles and has a whitewashed front west wall. This wall includes a loft door with a timber lintel towards the right, above a broader main door, also with a timber lintel. To the left of the main door is a smaller door, and further left is a small window, both with timber lintels. The north end gable is made of rubble stone and includes one window on each floor. The rear of the building has one upper window and an added ground floor lean-to. The property is not available for inspection.

Local climate

Abercynrig Mill sits in one of the wettest parts of the UK, with an average of 1,260 mm of rain a year. This makes it wetter than 93% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.

It experiences an average of 56 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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