Tretower Court Barn is a Grade II* listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 21 October 1998. Barn.

Tretower Court Barn

WRENN ID
rough-screen-shade
Grade
II*
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
21 October 1998
Type
Barn
Address
Tretower Court Barn, Llanfihangel Cwmdu with Bwlch and Cathedine, Powys
OS grid reference
SO 186 211
Coordinates
51.88339, -3.18374
Source
Cadw listing

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

Description

Tretower Court Barn is a large, complex building, likely originating in the 16th century with a significant rebuild in the 17th century. It is constructed of rubble sandstone with a stone-tile roof and slightly swept eaves. The barn is divided into two main units by a butt joint; the northern unit is slightly longer and represents the 17th-century reconstruction, while the southern unit dates back to the 16th century.

The west wall, facing Tretower Court, displays the features of the northern unit. A tall cart passage doorway is located to the left, set beneath a renewed timber lintel and fitted with double boarded doors. To the left of this doorway is a smaller doorway with a timber lintel and a boarded stable door. The left jamb of this smaller doorway continues upwards as a full-height butt joint. To the right of the cart passage are three doorways leading to dung and feed passages within the byre, each with boarded doors under timber lintels. Above these doorways, the ends of cross-beams are exposed, potentially indicating a former pentice. The southern unit has a tall, wide cart passage doorway with double boarded doors and renewed timber lintels. Large limestone blocks form the jamb on the lower south side, and two tiers of small openings framed in dressed stone flank the doorway. The south gable end features a blocked window with inserted narrow breathers flanking it, above which is a five-light window with diamond mullions, minor stanchions in wood, and a timber lintel. An opening in the east wall of the southern unit has a renewed lintel and corrugated iron doors, with a single small, framed opening to the right. The northern unit has a boarded-up cart passage doorway to the right, with two openings under timber lintels to the left (the blocking of a third is visible from within), mirroring the byre passages. A corrugated lean-to is attached to the rear of the barn. A tall, narrow breather is located to the right of the cart passage doorway in the north unit, while the north gable end has three tiers of breathers.

A substantial late 15th-century fireplace, at the original first-floor level, is found in the dividing wall between the north and south units, on the north side, with a deep chamfered lintel. The level of the floor is visible within the dividing wall, though little else remains. Inside the northern unit, a rubble stone partition wall runs between the byre and the barn, abutting the main walls and rising to the height of the cross-beams, defining the position of a former loft that was lower than the first floor of the original building. To the south of this partition wall, the three passages have flagged floors, and the former stalls are partly cobbled. A first-floor stack sits on corbels in the south face of the dividing wall, though it is now blocked beneath the roof.

Local climate

Tretower Court Barn sits in a wetter-than-average part of the UK, with an average of 1,100 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 74% of listed buildings.

It experiences an average of 54 freeze-thaw cycles a year, more than 94% of listed buildings. Of these, 30 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.

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