Barn at Llwynyfedwen is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 21 October 1998. Barn.

Barn at Llwynyfedwen

WRENN ID
first-flagstone-violet
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
Barn
Address
Barn at Llwynyfedwen, Myarth, Llanfihangel Cwmdu with Bwlch and Cathedine, Powys
OS grid reference
SO 157 206
Coordinates
51.87795, -3.22571
Source
Cadw listing

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

Description

The barn at Llwynyfedwen is a rubble stone structure featuring a slate roof and an offset cart passage located slightly towards the south end. The walls show traces of limewash. Full-height boarded doors are flanked by tall, narrow breathers. On the south gable end, there is a small lean-to pigsty made of rubble stone, along with a walled pen. The north gable end has stepped breathers. There are modern canopy lean-tos on the east and north sides of the barn. The roof consists of six bays, with most of the trusses having been renewed.

Local climate

Barn at Llwynyfedwen 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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  • No EPC on record for this property
  • No sale records on file
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  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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  2. Stable at Llwynyfedwen Grade II 29 m
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