Great Porthamel Farmhouse is a Grade II* listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 February 1952. Farmhouse. 1 related planning application.
Great Porthamel Farmhouse
- WRENN ID
- crooked-corridor-clover
- Grade
- II*
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 28 February 1952
- Type
- Farmhouse
- Address
- Great Porthamel Farmhouse, Talgarth, Powys, LD3 0DL
- OS grid reference
- SO 159 352
- Coordinates
- 52.00886, -3.2262
- Source
- Cadw listing
Description
Great Porthamel Farmhouse is a largely 16th-century farmhouse, with 18th-century additions and alterations. It is built of rendered stone with a slate roof, hipped at the east end. The original plan included a near-central cross passage leading into a former four-bay open hall to the right, with a lateral stack. To the left of the cross passage was a heated room, possibly a kitchen, and above it a great chamber extending over the cross passage. A small closet was situated in the narrow southern bay. A late medieval rear wing, at a right angle to the main house, originally extended to the right, containing a granary. A narrow building, possibly a stair tower, led from the corner of the heated room to the south. These wings were demolished around 1975. At the north end of the farmhouse, there's a pair of 18th-century dairies, likely built on the footprint of a single-story medieval building.
An early Tudor period two-story porch stands over the entrance to the cross passage, featuring a moulded two-centred arch with a hood mould that descends to square carved terminals. The farmhouse has 19th-century six-pane sash windows within segmental-headed openings on the ground floor, and four-pane sashes in gabled raised dormers above. A 19th-century farm kitchen was added at the south end, including a bay window on the south face, which has been reglazed. The rear windows and those where the wings were demolished have been replaced. The porch has internal side seats, and the walls are rendered. The east gable end has two windows on each floor.
The farmhouse was not accessible during inspection in April 1995, but it is known to contain important interiors. The three roof trusses in the hall are particularly noteworthy, exhibiting chamfered scissor rafters with halved pendant posts, which originally featured carved bosses. The spandrels are filled with pierced cusped boards. There are three tiers of purlins, with wind braces to the lower two tiers. The principal rafters sit on stub bearing plates, which may have originally projected internally and had carved bosses, but these have since been removed. The trusses over the great chamber are simpler, with arched brace collars and a close-studded truss separating the inner closet. A four-centred doorhead in the structure running south from the south end suggests it was a stair tower. The chamber above the porch features a panelled vault with moulded timber ribs. The dairies at the north end have a central cross beam and windows to the gable end. Wall paintings were recorded in 1962.
Local climate
Great Porthamel Farmhouse 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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- No EPC on record for this property
- Sale history — 3 transactions since 2003
- Related listed building consents — 1 application
- 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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