Poltesco Mill is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 9 April 1975. Water mill.
Poltesco Mill
- WRENN ID
- empty-joist-acorn
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- St Ives MP: Andrew George (LD)
- Country
- England
- Date first listed
- 9 April 1975
- Type
- Water mill
- Address
- Poltesco Mill, Grade-Ruan
- OS grid reference
- SW 724 156
- Coordinates
- 49.99772, -5.1771
- Source
- Historic England listing
Description
Poltesco Mill is a water mill, primarily built in the 18th and 19th centuries, with a datestone indicating the year 1786, and some early features that may date back to the 14th century. The structure is made of stone rubble with horizontal timber boarding and has a slurried scantle slate roof. It features a square brick chimney.
The east front has a central wide 19th-century stable door with a chamfered lintel above it, and directly above is a central 4-pane window. The south front has two steps leading up to a wide 18th-century door with a timber lintel above. Below the gabled end, there is a 4-pane window and three square brick dove holes.
A later store has been added to the north-east corner, which has a rubble base and 20th-century horizontal timber boarding below an asymmetrical gable end. This store includes a partly glazed door with a 4-pane window directly above.
Inside, there is a 17-foot 6-inch overshot hybrid wheel made of metal and timber, dating from the 1870s, along with two pairs of millstones and complete horizontal gearing. A small crucifixion figure, possibly medieval, is carved on a stone inside the building. The mill pool is still present.
Local climate
Poltesco Mill receives an average of 910 mm of rain a year. This makes it wetter than 68% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.
It experiences an average of 1 freeze-thaw cycle a year, fewer than 99% of listed buildings. Of these, 1 follows 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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