Nannerth Ganol is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 12 December 1952. Cottage. 2 related planning applications.
Nannerth Ganol
- WRENN ID
- slow-gable-larch
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 12 December 1952
- Type
- Cottage
- Address
- Nannerth Ganol, Rhayader, LD6 5HA
- OS grid reference
- SN 942 713
- Coordinates
- 52.33024, -3.55393
- Source
- Cadw listing
Description
Nannerth Ganol is a stone building with a slate roof, featuring a lower end that is weatherboarded. It is situated on a slope, with the entrance front facing a former farmyard. The building has a tall square stone chimney with oversailing top courses and projecting weatherings. There are three gabled dormer windows with casement glazing. The left end, which has been modernly rebuilt, includes weatherboarding, an oak entrance door, and windows to the left. To the right of this, there is another doorway flanked by broad windows with diagonal wooden mullions (which have been renewed), along with a small square window at the eaves. The rear end is also weatherboarded and resembles the front; the upper section features two broad windows with diagonal mullions, partly original.
Inside, the cross passage has original stone flags. The room to the right contains stone stairs beside the chimney, a heavy fireplace lintel, and a restored post and panel partition. The structure includes three cruck couples with spurs that raise the eaves, notch-lapped collars, and tie beams.
Local climate
Nannerth Ganol sits in one of the wettest parts of the UK, with an average of 1,200 mm of rain a year. This makes it wetter than 91% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 84% of listed buildings.
It experiences an average of 54 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 33 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- No sale records on file
- Related listed building consents — 2 applications
- 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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