Berthlwyd is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 14 October 2005. Farmhouse.
Berthlwyd
- WRENN ID
- tall-flagstone-candle
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 14 October 2005
- Type
- Farmhouse
- Address
- Berthlwyd, Nedd Fechan Valley, Aberdare, Ystradfellte, Powys
- OS grid reference
- SN 913 132
- Coordinates
- 51.80718, -3.57797
- Source
- Cadw listing
Description
Berthlwyd is a farmhouse constructed from colourwashed rubble stone with slate roofs and whitewashed stone end stacks. It is a two-storey building featuring a three-window range of hornless sashes that have cambered heads, stone voussoirs, and stone sills. The central door is located within a large colourwashed stone porch, which also has a cambered head above the entry. The door itself is a 9-panel design, also with a similar cambered head.
To the right, there is an added service range that is whitewashed and has a whitewashed stone right end stack. This range includes a horned 4-pane sash window above a pair of cambered-headed casements to the left and a cambered-headed door in the centre. The ground floor openings have brick heads.
At the rear of the house, there is one small window on each floor to the right and one small window on the first floor to the left, all featuring cambered heads. The service wing extends to the rear with a long roof.
Inside, the farmhouse has a simple layout. The kitchen has stone flags and two beams, while the dairy behind it features stone flags and low slate shelves. The main house has a two-room plan with an enclosed stair from the principal room, which includes a renewed oak lintel over the fireplace, two oak beams—one of which is chamfered and stopped—and hooks in the ceiling. There is a six-panel door leading to the parlour at the left end.
Local climate
Berthlwyd sits in one of the wettest parts of the UK, with an average of 1,410 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.
It experiences an average of 52 freeze-thaw cycles a year, more than 93% 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.
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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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