Barn range at Maes Mawr is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 17 December 1998. Barn.
Barn range at Maes Mawr
- WRENN ID
- old-nave-elder
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 17 December 1998
- Type
- Barn
- Address
- Barn range at Maes Mawr, Talybont on Usk, Talybont-On-Usk, Powys
- OS grid reference
- SO 117 226
- Coordinates
- 51.89511, -3.28338
- Source
- Cadw listing
Description
The barn range at Maes Mawr is a long structure built of stone rubble with a corrugated roof. The main barn features a deep two-storey hipped roof porch at the front, with a front extension to the right that has a catslide roof. To the left, there is a smaller extension that allows two rows of ventilation slits on the barn to remain visible.
To the north, there is a long cross wing with a stone base and a timber frame above, which is boarded. Attached to the left and sharing the same ridge but with a different pitch is a two-storey range, likely a byre with a loft above. This section has segmental arched openings on both floors and ventilation slits, with a widened entrance at the left end.
At the rear, the barn shows signs of alteration, including a blocked door opposite the main porch, loft openings under the eaves, a few ventilation slits, and unused lower double doors to the right. Attached to the south is a lower bayed range that has been altered and is now part of a large cattle shed with a corrugated roof. The gable end of this shed faces the lane and features a pitching eye and doorway. The farmyard is enclosed by a rubble wall along the lane. The interior was not inspected during the survey on 30th September 1997.
Local climate
Barn range at Maes Mawr sits in one of the wettest parts of the UK, with an average of 1,180 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 78% of listed buildings.
It experiences an average of 57 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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- 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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