Glan Irfon is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 19 September 1952. House.
Glan Irfon
- WRENN ID
- roaming-marble-heath
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 19 September 1952
- Type
- House
- Address
- Glan Irfon, Cilmery
- OS grid reference
- SO 003 508
- Coordinates
- 52.14694, -3.45824
- Source
- Cadw listing
Description
Glan Irfon is a 2-storey, 3-bay house featuring a continuous rear outshut. It is constructed of rubble stone with a slate-hung front and a slate roof, which has rendered stacks at both ends. The windows are wooden casements in their original openings, except for the upper centre and lower right windows, which have been replaced with modern materials. A central gabled bay is slightly forward and has a replaced diamond window in the attic. There is an added central porch with a half-lit door.
On the right gable end, the outshut has two added windows made of modern materials, with the rear window located in an extension of the original outshut. The left gable end features an inserted window in the outshut, while the rear of the outshut retains a single wooden casement.
The original plan layout has been preserved, but the original panelled partitions and details of the door heads have been infilled. Upon entering through the central entrance, the original hall is located on the right side, and a smaller parlour is on the left side, with the stairway immediately behind it. The outshut contains the dairy and a former kitchen, although the kitchen has been altered, and its fireplace has been removed.
Local climate
Glan Irfon sits in a wetter-than-average part of the UK, with an average of 1,140 mm of rain a year. This makes it wetter than 89% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 79% of listed buildings.
It experiences an average of 46 freeze-thaw cycles a year, more than 87% of listed buildings. Of these, 26 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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