L-Plan Range of Outbuildings at Trewern is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 15 February 1993. Outbuildings.

L-Plan Range of Outbuildings at Trewern

WRENN ID
north-eave-rook
Grade
II
Local Planning Authority
Powys
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
15 February 1993
Type
Outbuildings
Address
L-Plan Range of Outbuildings at Trewern, Weythel, Old Radnor
OS grid reference
SO 221 571
Coordinates
52.20717, -3.14095
Source
Cadw listing

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

Description

The L-Plan range of outbuildings at Trewern includes a barn dating from the 16th or 17th century, which features three bays and is timber-framed with a weather-boarded front. The structure incorporates much re-used timber but retains significant elements of square-panel framing, jowled storey posts, pegged tie-beam trusses with raking braces, and trenched purlins. The common rafters have been renewed, and there are two tall, opposing double doors.

Adjoining the barn to the north-east is a cowhouse under a continuous roofline, which is likely from the 18th century and has rubble base walls with a weather-boarded upper section. At the rear of the barn and cowhouse range, flanking the barn entry bay, are two wide lean-to cowhouse blocks from the 19th century, constructed of red brick and featuring good quality boarded doors along with part-glazed, part-louvred windows.

The north-west range, also from the 19th century, includes a stable, loose boxes, a traphouse, a cartshed/granary, and pigsties. This range is two storeys high and is built of red and blue brick laid in a diaper pattern, topped with a slate roof. The stables have a weather-boarded front elevation.

Local climate

L-Plan Range of Outbuildings at Trewern receives an average of 890 mm of rain a year. This makes it wetter than 66% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 54% of listed buildings.

It experiences an average of 50 freeze-thaw cycles a year, more than 91% of listed buildings. Of these, 28 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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