Llwyn-cus is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 30 October 2000. House.
Llwyn-cus
- WRENN ID
- broken-grate-crag
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 30 October 2000
- Type
- House
- Address
- Llwyn-cus, Llanlleonfel, Treflys
- OS grid reference
- SN 927 507
- Coordinates
- 52.14427, -3.56803
- Source
- Cadw listing
Description
Llwyn-cus is a two-and-a-half-storey, three-window house built of rubble stone, featuring a slate roof and coursed-stone end stacks. The front roof slope has two added skylights, and there is a single skylight at the rear. The openings have segmental stone heads, and the windows are late 19th-century replacements in the original openings, with six panes in the upper storey and twelve panes in the lower storey. The central boarded door is a replacement that is lower than the original, with stonework above it. At the rear, there is an added continuous single-storey blockwork lean-to, which has three small-pane wooden cross windows, with the right window being renewed. The left gable end features a single narrow pantry vent at the lower left.
Inside, the central entrance hall includes a full-height dog-leg stair with plain balusters and newels. The kitchen on the left retains ceiling rings for hanging pork and salmon. The parlour has a boarded floor, while the other ground-floor rooms have retained flagstones. Panelled doors are found throughout the house.
Local climate
Llwyn-cus 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 82% of listed buildings.
It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 27 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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