Former Flour and Grist Mill at The Mill is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 19 November 1998. Mill.

Former Flour and Grist Mill at The Mill

WRENN ID
pitched-outpost-cobweb
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
19 November 1998
Type
Mill
Address
Former Flour and Grist Mill at The Mill, Grwyne Fechan, the Vale of Grwyney, Powys
OS grid reference
SO 242 233
Coordinates
51.90339, -3.10305
Source
Cadw listing

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

Description

The Former Flour and Grist Mill at The Mill is a two-storey structure built of rubble stone, topped with a restored stone tile roof. The front features a wide boarded door on the lower right, which is large enough for the conveyance of sacks, and to its left is a narrower opening secured with iron bars. Above the doorway, there is a boarded opening used for hoisting grain into the building, and a small two-light window is positioned to the left of this. The waterwheel was located against the left gable end; although the wheelpit is mostly infilled now, there remains an opening at low level for the axle-tree, and a boarded gable opening is situated at the height of the sluice box. An added lean-to stable is attached to the right gable end, which includes an inserted doorway on the right. The rear of the mill is built into the bank and features a doorway on the upper right beneath a gablet, providing access from the house. There is also an added garage at a lower level behind to the left.

The roof has three bays with trusses that include collar beams. The right gable end contains an infilled ground-floor fireplace, likely from a former drying floor. The lower storey retains part of the axle-tree, along with the pit wheel and wallower, while the crown wheel is still present on the upper floor.

Local climate

Former Flour and Grist Mill at The Mill sits in a wetter-than-average part of the UK, with an average of 1,020 mm of rain a year. This makes it wetter than 81% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 71% of listed buildings.

It experiences an average of 50 freeze-thaw cycles a year, more than 92% of listed buildings. Of these, 27 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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