Pen Graig Barn is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 11 April 1980. Barn.
Pen Graig Barn
- WRENN ID
- tattered-lead-crag
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 11 April 1980
- Type
- Barn
- Address
- Pen Graig Barn, Llys Buallt, Builth
- OS grid reference
- SO 037 507
- Coordinates
- 52.14685, -3.40838
- Source
- Cadw listing
Description
Pen Graig Barn is a timber-framed barn built on a stone plinth, with part of its exterior weatherboarded and a slate roof. It features a central open bay on each long side. The north elevation has open framing on the left-hand bays, while there is an enclosed store room to the west. The gable ends are boarded.
The barn consists of five bays, with open trusses resting on timber sill-beams. These support central posts that rise to tie-beams, which are then connected to arch braces that extend to the wall posts. The construction includes pegged mortice and tenon joints, marked by carpenter's marks. The roof is a queen strut gabled design. The floor is made up of some stone slabs and cobbles, and the western end is enclosed.
Local climate
Pen Graig Barn sits in a wetter-than-average part of the UK, with an average of 1,080 mm of rain a year. This makes it wetter than 86% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.
It experiences an average of 46 freeze-thaw cycles a year, more than 87% 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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