Engine House at Sw696491 (Great Charlotte) is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 31 October 1988. Engine house.

Engine House at Sw696491 (Great Charlotte)

WRENN ID
hallowed-cloister-meadow
Grade
II
Local Planning Authority
Cornwall
Constituency
Camborne and Redruth MP: Perran Moon (Lab)
Country
England
Date first listed
31 October 1988
Type
Engine house
Address
Engine House at Sw696491 (Great Charlotte), St. Agnes
OS grid reference
SW 696 490
Coordinates
50.2963, -5.23524
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The engine house at Great Charlotte is a pumping beam engine house built in the early to mid 19th century. It is constructed from granite and killas rubble, featuring granite dressings. The structure retains only the thick bob wall from its original rectangular shape. The sole opening is a central round-arched plug doorway, which is adorned with granite voussoirs and a projecting keystone. This building serves as an important landmark in an unspoiled coastal valley and is situated on a cliff top overlooking the pristine Chapel Porth cove.

Local climate

Engine House at Sw696491 (Great Charlotte) receives an average of 920 mm of rain a year. This makes it wetter than 70% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.

It experiences an average of 4 freeze-thaw cycles a year, fewer than 98% 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 0.3°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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  • 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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