Rhiwlas House is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 22 March 1993. House.
Rhiwlas House
- WRENN ID
- silver-spindle-heron
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 22 March 1993
- Type
- House
- Address
- Rhiwlas House, Llanfyllin
- OS grid reference
- SJ 140 195
- Coordinates
- 52.7671, -3.27494
- Source
- Cadw listing
Description
Rhiwlas House is a two-storey building with a three-window front, constructed from Llanfyllin brick. It features a hipped slate roof with bracketed eaves and brick chimneys. The windows are twelve-pane hornless sashes. The central entrance door is framed by a doorcase with half columns and a cornice, although this is obscured by a modern hipped porch. To the right, the end wall is made of rubble, which is complemented by a rubble rear wing.
Local climate
Rhiwlas House 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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