Garthmyl Hall is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 26 October 1953. House.
Garthmyl Hall
- WRENN ID
- high-hearth-moth
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 26 October 1953
- Type
- House
- Address
- Garthmyl Hall, Berriew, SY15 6RS
- OS grid reference
- SO 190 989
- Coordinates
- 52.5822, -3.19558
- Source
- Cadw listing
Description
Garthmyl Hall is a Victorian building constructed of brick with stone dressings and a slate roof, featuring axial brick stacks with stone caps. It stands two storeys high and has a five-window range, with six-window return elevations. The entrance front has a central bay that is slightly advanced and pedimented, supported by coupled Tuscan pilasters at the porch. Each floor of the outer bays has 12-pane sash windows, including one above the doorway, all adorned with stone voussoir heads. The building also features stone angle quoins and a modillion eaves cornice, while the return elevations have simpler detailing.
The interior is noted for its Italianate plasterwork and includes an Ionic screen that separates the entrance hall from the staircase.
Local climate
Garthmyl Hall receives an average of 900 mm of rain a year. This makes it wetter than 67% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 58% of listed buildings.
It experiences an average of 42 freeze-thaw cycles a year, more than 81% of listed buildings. Of these, 23 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 1 transaction since 2013
- 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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