Pentre-isaf Farmhouse is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 29 December 1989. Building.

Pentre-isaf Farmhouse

WRENN ID
other-cobalt-grain
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
29 December 1989
Type
Building
Address
Pentre-isaf Farmhouse, Ty Bain, Llanfechain
OS grid reference
SJ 201 215
Coordinates
52.78586, -3.18504
Source
Cadw listing

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

Description

Pentre-isaf Farmhouse is a building that dates back to before the 19th century. Originally, the earlier sections of the farmhouse were half-timbered, but much of this has since been covered with rubble and some brick nogging. The slate roof remains on much of the cross wings, and there is a fine stone ribbed stack for the chimney that heats the hall and east wing, which is contemporary with it. The west wing features brick chimney stacks and boarded eaves. A central dormer likely replaces an older one, and the entrance is now on the left side of the west wing, having previously been located beneath the chimney stack. The east wing has a doorway with cambered brick voussoirs and a small pane window, while the first floor of the west wing has small pane sash windows, with the lower ones blocked. The rear section of the east wing, which is a later addition, has close studding on the upper floor's east side and brick nogging with square panelling at the rear and west side.

At the time of inspections, the building was noted to be in poor condition. Internally, the central hall is small due to the large stone stack that was inserted around 1660. The ceiling has a curious camber, and the original square panelled end wall has been found embedded in the fireplace. A fine post and panel dais partition is retained, with visible peg holes for the bench; the cross beam and joists are deeply chamfered and simply stopped. The stairs, which used to be located to the north of the fireplace, have been reversed and now rise from the east wing. The ground floor of this wing features later ogee stop chamfers. At the rear, where a later lean-to has been added, the square panelled former external north wall of the hall is visible. Upstairs, there are half-timbered partitions and original roof trusses. The group value with the earlier house located downhill, which is now a barn, adds particular interest to the property.

Local climate

Pentre-isaf Farmhouse receives an average of 890 mm of rain a year. This makes it wetter than 66% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 56% of listed buildings.

It experiences an average of 43 freeze-thaw cycles a year, more than 84% 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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  • No EPC on record for this property
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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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