Barn at Trewallter Fawr is a Grade II listed building in the Vale of Glamorgan local planning authority area, Wales. First listed on 8 September 1995. Barn.
Barn at Trewallter Fawr
- WRENN ID
- muted-gallery-mint
- Grade
- II
- Local Planning Authority
- Vale of Glamorgan
- Constituency
- Vale of Glamorgan MP: Kanishka Narayan (Lab)
- Country
- Wales
- Date first listed
- 8 September 1995
- Type
- Barn
- Address
- Barn at Trewallter Fawr, Walterstone, Llancarfan
- OS grid reference
- ST 068 711
- Coordinates
- 51.43153, -3.34137
- Source
- Cadw listing
Description
The barn at Trewallter Fawr is an 18th-century multi-purpose structure. It has two storeys and features limewashed elevations topped with a slated, gabled roof. On the west elevation, there are two large door openings with boarded doors, along with two smaller window openings on the ground floor. The north gable has a single window opening, while the south gable is unlit. The east elevation includes a narrow doorway at the northern end, with a small square window to the right and a six-pane sash window at the first-floor level.
Local climate
Barn at Trewallter Fawr sits in a wetter-than-average part of the UK, with an average of 1,090 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 92% of listed buildings.
It experiences an average of 17 freeze-thaw cycles a year, fewer than 83% of listed buildings. Of these, 6 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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