Gelli Gason is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 31 January 1953. Farmhouse. 2 related planning applications.
Gelli Gason
- WRENN ID
- stubborn-chapel-thistle
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 31 January 1953
- Type
- Farmhouse
- Address
- Gelli Gason, Llanfair Caereinion, SY21 9HE
- OS grid reference
- SJ 117 065
- Coordinates
- 52.64969, -3.30537
- Source
- Cadw listing
Description
Gelli Gason is a late 17th century timber-framed farmhouse that has undergone extensive alterations to create attic rooms in the late 18th or early 19th century. The building consists of three bays and features a box frame with a central chimney stack located at the back of a passage. Originally, it was two storeys high with cellars, displaying six square panels to the wallplate. The roof has been raised by two shallow panels to accommodate a new wallplate height, and there are three dormer windows above. The infill panels are rendered, likely over brick nogging. The west gable was reconstructed with brickwork during 19th century alterations, while the east gable is rendered overall. The roof is covered with slate.
At the west end, there is a rectangular two-storey rear wing made of whitened rendered masonry, likely built as a later service wing, now topped with a corrugated iron roof. The south entrance features a modern four-panel half-glazed door. The windows are 19th century casements, with the attic and first floor having six lights each, and the ground floor having nine lights. There are also two modern windows at the west end of the south elevation.
The interior was not accessible at the time of inspection. Gelli Gason is listed as a notable example of high-quality timber-framed construction, with its alterations reflecting social and domestic development.
Local climate
Gelli Gason sits in a wetter-than-average part of the UK, with an average of 980 mm of rain a year. This makes it wetter than 78% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 71% of listed buildings.
It experiences an average of 43 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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- No EPC on record for this property
- No sale records on file
- Related listed building consents — 2 applications
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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