The Old Saw Mill is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 21 October 1998. House.

The Old Saw Mill

WRENN ID
peeling-ember-thunder
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
21 October 1998
Type
House
Address
The Old Saw Mill, Llynfi Valley, Llanfihangel Cwmdu with Bwlch and Cathedine, Powys
OS grid reference
SO 143 229
Coordinates
51.89834, -3.24647
Source
Cadw listing

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

Description

The Old Saw Mill is a two-storey house with a lower two-storey former paint shop attached to the right and a former mill attached to the left, with an additional wing at the back. The building is constructed of rubble sandstone and has slate roofs. The house features scribed roughcast painted white, projecting eaves, a stone stack on the left, and a brick stack on the right. It is double fronted with horned sash windows set in architraves and a panelled door. The paint shop has two windows, with blocked openings and a central-pivoting window on the upper right. The mill on the left has a central stone stack, boarded doors on the left (with an overlight) and in the centre, a boarded-up opening on the right under a stone lintel, and a boarded upper-storey opening. The rear of the house is cement rendered and has two windows with casements in the upper storey, a boarded door on the lower right, and an earlier hornless sash window in the lower centre. The paint shop features boarded doors on each storey with windows to the left. The mill has a single two-light casement under a lintel, set back from the angle of the added rear wing, which includes a wheelpit and an arched tailrace entrance at its rear gable end. The saw mill machinery was reportedly removed, but it was not inspected at the time of the survey in August 1997.

Local climate

The Old Saw Mill sits in a wetter-than-average part of the UK, with an average of 1,100 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 74% of listed buildings.

It experiences an average of 54 freeze-thaw cycles a year, more than 94% of listed buildings. Of these, 30 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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