The Old House at Pentre Farm is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 26 July 1990. Farmhouse.

The Old House at Pentre Farm

WRENN ID
high-sandstone-sunrise
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Monmouthshire MP: Catherine Fookes (Lab)
Country
Wales
Date first listed
26 July 1990
Type
Farmhouse
Address
The Old House at Pentre Farm, Twyn Allws, Llanfoist Fawr, Monmouthshire
OS grid reference
SO 253 137
Coordinates
51.81752, -3.08472
Source
Cadw listing

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

Description

The Old House at Pentre Farm is a late 16th century to early 17th century sub-medieval farmhouse that has undergone recent restoration and extension.

The exterior features a two-storey rubble construction, which was formerly limewashed, with a battered base and a slate roof. A prominent chimney breast is located on the west gable end, showcasing twin diagonally-set stacks. The north and south elevations each have two timber-framed, diamond-mullioned windows; the north side has a 4-light window on the first floor, while the south side features a 5-light window on the east gable end, accompanied by a 3-light window at the gable apex. Simple stone dripmoulds are present above the windows. The farmhouse has off-centre doors leading to a former cross-passage, with renewed boarded doors set in cambered-arched doorways. To the left of the entrance on the north front, there is a long stone seat, and on the east gable end, outside steps lead up to a first-floor doorway. A two-storey extension was added in 1995.

Inside, the farmhouse retains stop-chamfered ceiling beams in the former hall, although the post and panel partition now only survives on the first floor. The interior also features splayed window recesses and a 3-bay A-frame roof with through purlins. The building is listed for its special interest as a sub-medieval farmhouse that still retains good detail.

Local climate

The Old House at Pentre Farm sits in a wetter-than-average part of the UK, with an average of 1,040 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.

It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 24 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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