Diosg is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 31 January 1997. House.
Diosg
- WRENN ID
- plain-stone-foxglove
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 31 January 1997
- Type
- House
- Address
- Diosg, Dolfach, Llanbrynmair
- OS grid reference
- SH 910 014
- Coordinates
- 52.59961, -3.61023
- Source
- Cadw listing
Description
Diosg is a late 18th-century stone building with a slate roof. It has two storeys and features a main two-bay range with a lean-to at the upper end and a lean-to stable at the lower gable end. In 1830, Samuel Roberts added a two-bay wing to the front of the upper bay, which is marked by a date stone built into the front wall. The main building includes a boarded door and small pane iron-framed windows, one of which has been replaced. The added wing features 24 and 36-pane iron windows set in timber frames, with large slate lintels above the openings. A slate plaque attached to the front wall by the door reads DYMA GARTREF SR / 1806-1857.
Inside, there is a lobby entry next to the gable stack, leading to a living room that has a spine beam with ogee stops. The inner parlour and a small pantry at the lower end have been combined into a kitchen. The wing, which is said to have been a wine room, contains an inner room behind an axial stack.
Local climate
Diosg sits in one of the wettest parts of the UK, with an average of 1,190 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 85% of listed buildings.
It experiences an average of 47 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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