Farm-building at Porthamel Farm is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 14 August 1995. Farm building. 2 related planning applications.
Farm-building at Porthamel Farm
- WRENN ID
- sheer-threshold-nightshade
- 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 August 1995
- Type
- Farm building
- Address
- Farm-building at Porthamel Farm, Talgarth, Powys, LD3 0DL
- OS grid reference
- SO 159 351
- Coordinates
- 52.00858, -3.22614
- Source
- Cadw listing
Description
Porthamel Farm features a two-storey farm-building constructed from sandstone and topped with a corrugated iron roof. The building has six bays and has been extended to the west with a two-storey lean-to structure that was originally a granary, complete with an external stair. The main entrance is centrally located on the north side and has a chamfered lintel, with an additional blocked opening immediately to the east. There are small ventilation slits, most of which are blocked, and a door on the east gable that is also blocked. At the rear, there are two re-set late medieval chamfered arched doorways and two pitching doors located above. The roof structure consists of tie and principal rafter trusses, although the morticed collars are missing. The upper floor is supported by a central runner, which is held up at intervals by stop-chamfered posts.
Local climate
Farm-building at Porthamel Farm sits in a wetter-than-average part of the UK, with an average of 1,030 mm of rain a year. This makes it wetter than 82% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 68% of listed buildings.
It experiences an average of 52 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 29 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
- Related listed building consents — 2 applications
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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