Cefn Garthmyl Farmhouse is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 21 August 1995. Farmhouse.
Cefn Garthmyl Farmhouse
- WRENN ID
- floating-pillar-ebony
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 21 August 1995
- Type
- Farmhouse
- Address
- Cefn Garthmyl Farmhouse, Berriew
- OS grid reference
- SO 183 994
- Coordinates
- 52.58706, -3.20615
- Source
- Cadw listing
Description
Cefn Garthmyl Farmhouse is likely a small timber-framed farmhouse from the late 17th century. The main elevations are rendered, while one gable end shows the exposed framing. It has a slate roof and features square panelled framing with a collar-strut roof. The house is one and a half storeys tall and follows a two-unit baffle entry plan with a central stack. A gabled porch, which is probably a 19th-century addition, is flanked by three-light casement windows, and there are two-light casements in framed gabled dormers that are slightly offset in the roof. The continuous outshut at the rear may be partially original and contains the staircase located behind the stack. The rear wing, made of painted brick, is likely from the mid-19th century. Inside, the principal room has a bressumer over a recessed fireplace, paired chamfered spine beams, and heavy joists in the ceiling.
Local climate
Cefn Garthmyl Farmhouse receives an average of 900 mm of rain a year. This makes it wetter than 67% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 58% of listed buildings.
It experiences an average of 42 freeze-thaw cycles a year, more than 81% of listed buildings. Of these, 23 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
- No sale records on file
- No related consent applications matched
- 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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