Trewen Mill is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 10 May 1989. Mill and millhouse. 2 related planning applications.
Trewen Mill
- WRENN ID
- errant-threshold-moth
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- North Cornwall MP: Ben Maguire (LD)
- Country
- England
- Date first listed
- 10 May 1989
- Type
- Mill and millhouse
- Address
- Trewen Mill, PL15 8QF
- OS grid reference
- SX 252 831
- Coordinates
- 50.62173, -4.47226
- Source
- Historic England listing
Description
Trewen Mill is probably of the 18th century, and comprises a mill and millhouse. The building is constructed of stone rubble, with a rendered and painted front, and has a slate roof with gable ends. A stone rubble end stack is located on the left. The original layout is uncertain, but it likely features a one-room plan house to the left, heated by the end stack, with an attached mill to the right. A leat runs to the rear of the house, and a small outshut on the front right was originally used as a shippon. The front facade is asymmetrical, with two windows. The house to the left has a 20th-century door flanked by two 20th-century three-light casements, with two further 20th-century casements on the first floor. A lean-to outshut is positioned on the front right. The rear elevation is notably unspoiled, with a small outshut extension to the rear of the house. The interior has not been inspected. The building holds group value as an example of a rural mill and millhouse complex.
Local climate
Trewen Mill sits in a wetter-than-average part of the UK, with an average of 1,030 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 86% of listed buildings.
It experiences an average of 16 freeze-thaw cycles a year, fewer than 84% of listed buildings. Of these, 7 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 2023
- 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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