Barn at Tynyllwyn is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 19 November 1998. Barn.
Barn at Tynyllwyn
- WRENN ID
- winter-jade-lichen
- 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
- Barn
- Address
- Barn at Tynyllwyn, Partrishow, the Vale of Grwyney, Powys
- OS grid reference
- SO 280 223
- Coordinates
- 51.89498, -3.04698
- Source
- Cadw listing
Description
The barn at Tynyllwyn is a Grade II listed structure built from rubble stone and topped with a corrugated iron roof. It features a full-height wagon bay doorway on the yard side, which is offset to the right and has later double boarded doors. To the right of the doorway are two ventilation slits, and to the left is a later single-storey link to the byre. The right gable end includes a loft opening with a timber lintel and wooden frame. Behind the wagon bay doorway, there is a lean-to on the left side, which has a doorway under a timber lintel facing the yard, above which is a stone engraved with 'JP 1857'. To the right of this doorway is a lintelled window with a stone engraved '168...'. Additionally, to the right of the rear cart passage doorway, there is an added blockwork lean-to. The left gable end, on the downhill side, has two ventilation slits. The barn has a six-bay roof supported by tie- and collar-beam trusses.
Local climate
Barn at Tynyllwyn receives an average of 940 mm of rain a year. This makes it wetter than 72% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 65% of listed buildings.
It experiences an average of 49 freeze-thaw cycles a year, more than 90% of listed buildings. Of these, 25 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
- No related consent applications matched
- 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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Nearby listed buildings
- Hen house and attached wall at Tynyllwyn
- Cattle ramp, cobbled pavement and revetment at Tynyllwyn
- Byre at Tynyllwyn
- Stable at Tynyllwyn
- Tynyllwyn
- Upper Revetment, Goose Cot and Stairs at Tynyllwyn
- Lower Revetment including Steps and Bull Cot at Tynyllwyn
- Pig Sty, Ty Bach and Associated Walls at Tynyllwyn
- Cart Shed and Cider Mill at Tynyllwyn
- Churchyard cross at Church of St Issui, Partrishow