Trethella Farmhouse is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 27 November 1985. Farmhouse.
Trethella Farmhouse
- WRENN ID
- small-niche-kestrel
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- Truro and Falmouth MP: Jayne Kirkham (Lab)
- Country
- England
- Date first listed
- 27 November 1985
- Type
- Farmhouse
- Address
- Trethella Farmhouse, Ruanlanihorne
- OS grid reference
- SW 895 415
- Coordinates
- 50.23683, -4.95293
- Source
- Historic England listing
Description
Trethella Farmhouse is an early 19th-century farmhouse constructed from slatestone, featuring granite and freestone dressings, and a half-hipped slate roof with brick chimneys on the side walls, which may have been rebuilt. The building has a double depth central stair plan and stands two storeys tall. Its front is almost symmetrical with three windows. The round-headed doorway is centrally located relative to the window positions, although all are slightly grouped to the right. The door is a 20th-century glazed design with a fanlight above. The ground floor windows are wider and consist of 16-paned wooden sashes with sidelights, while the first floor also features 16-paned sashes, though the sills have been raised. The windows have cambered arches with freestone voussoirs and projecting keyblocks. There is a later 19th-century lean-to on the right side of the farmhouse. The interior has not been inspected.
Local climate
Trethella Farmhouse 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 88% of listed buildings.
It experiences an average of 5 freeze-thaw cycles a year, fewer than 97% of listed buildings. Of these, 2 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°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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