Llwynderw is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 25 October 1951. House.
Llwynderw
- WRENN ID
- fallow-lantern-swallow
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 25 October 1951
- Type
- House
- Address
- Llwynderw, Llanfyllin
- OS grid reference
- SJ 101 183
- Coordinates
- 52.7551, -3.33281
- Source
- Cadw listing
Description
Llwynderw is a one-storey building with an attic, set on a low plinth. It features a slate roof with brick end chimneys and three modern flat-roofed dormers. The walls are square-panelled, with the front wall consisting of three panels high, although a section on the right has been covered and has painted 'framing'. The entrance door is roughly central and is a part-glazed 19th-century door. There are two small-pane casement windows to the left and one to the right. The gable end on the right has end posts braced to the wall plate and a decorative gable with an embattled tie-beam, which bears the unlikely date of 1583.
At the rear, there is a single flat-roofed dormer, and only the lower part of the wall has exposed framing, along with two modern small-pane windows. There is a small extension with a chimney at the lower end of the building.
The kitchen, which is accessed from the left gable, features heavy beams with stopped ovolo chamfers.
Local climate
Llwynderw sits in a wetter-than-average part of the UK, with an average of 960 mm of rain a year. This makes it wetter than 75% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 61% of listed buildings.
It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 25 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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