Barn at Great House Farm is a Grade II listed building in the Vale of Glamorgan local planning authority area, Wales. First listed on 21 July 2003. Barn.
Barn at Great House Farm
- WRENN ID
- white-moat-plum
- Grade
- II
- Local Planning Authority
- Vale of Glamorgan
- Constituency
- Vale of Glamorgan MP: Kanishka Narayan (Lab)
- Country
- Wales
- Date first listed
- 21 July 2003
- Type
- Barn
- Address
- Barn at Great House Farm, Llanmaes, Barry, Llan-Maes
- OS grid reference
- SS 981 693
- Coordinates
- 51.41434, -3.46599
- Source
- Cadw listing
Description
The barn at Great House Farm is a Grade II listed building constructed from local white limestone and topped with a steel sheeting roof. The wall facing the road features a central elliptical arch leading to the threshing floor, which has a plank door. The arch appears to have been rebuilt in the 19th century to allow for a wider door. To the left of the arch is a slit vent, while to the right is a taking-in door that provides access to the hayloft. The gables of the barn also have slit vents, and the walling is otherwise plain. The verges of the roof suggest that it was originally thatched. On the rear wall, there is a central blocked door with a smaller head compared to the door on the road side, and a slit vent is located to the right.
The interior was not seen during the resurvey, but it has been described by the Royal Commission on the Ancient and Historical Monuments of Wales as having four bays. The type of roof is not known, but it is likely to be a queen strut roof.
Local climate
Barn at Great House Farm sits in one of the wettest parts of the UK, with an average of 1,170 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.
It experiences an average of 13 freeze-thaw cycles a year, fewer than 88% of listed buildings. Of these, 5 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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