Pentwyn Farmhouse is a Grade II listed building in the Monmouthshire local planning authority area, Wales. First listed on 4 March 1952. Farmhouse.

Pentwyn Farmhouse

WRENN ID
grey-porch-elm
Grade
II
Local Planning Authority
Monmouthshire
Constituency
Monmouthshire MP: Catherine Fookes (Lab)
Country
Wales
Date first listed
4 March 1952
Type
Farmhouse
Address
Pentwyn Farmhouse, Llanddewi Fach, Pontypool, Llangybi
OS grid reference
ST 317 977
Coordinates
51.67435, -2.9877
Source
Cadw listing

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

Description

Pentwyn Farmhouse is originally a cruck house. It features a steep slate roof and rendered rubble walls, with front steps that are slightly set back to the right. The building has one storey and an attic, with a brick chimney at the left end and a two-storey slated wing at the rear. The facade includes three asymmetrical windows with modern casements set in plain reveals and painted cills, along with three gabled dormers that have two-light casements. There is a pair of first-floor windows on the left gable end.

Inside, the farmhouse retains one cruck-truss over a post-and-panel partition. The sitting room has a large chamfered bressumer and chamfered beams, while a modern stair is also present.

Local climate

Pentwyn Farmhouse receives an average of 940 mm of rain a year. This makes it wetter than 73% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 72% of listed buildings.

It experiences an average of 41 freeze-thaw cycles a year, more than 79% of listed buildings. Of these, 19 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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  • 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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  4. Croeswen Farmhouse Grade II 851 m
  5. Race Farmhouse Grade II 1.2 km
  6. Barn at Race Farm Grade II 1.3 km
  7. Barn at Ty-coch Farm Grade II 1.4 km
  8. Church Farmhouse Grade II 1.4 km
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