Barn at Sunny Barn is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 16 December 1976. Barn.

Barn at Sunny Barn

WRENN ID
peeling-pediment-thunder
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
16 December 1976
Type
Barn
Address
Barn at Sunny Barn, Powys
OS grid reference
SO 055 280
Coordinates
51.94283, -3.37489
Source
Cadw listing

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

Description

The barn at Sunny Barn is a Grade II listed structure consisting of five bays, constructed with stone rubble walls and a half-hipped slate roof, situated on sloping ground. It features waggon entries on the long sides and has blocked ventilator slits. The roof and walls extend in a continuous line over a one-storey outbuilding with a loft, which was likely used as stables at the north end of the barn. The north gable end has a small boarded opening, while the west wall includes a doorway with a cambered head and a covered window at the eaves above a modern window. It is noted that the barn has five bays and a lower floor at the south end.

Local climate

Barn at Sunny Barn sits in one of the wettest parts of the UK, with an average of 1,260 mm of rain a year. This makes it wetter than 93% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.

It experiences an average of 56 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 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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