Cassacawn Millhouse is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 11 November 1987. Millhouse. 7 related planning applications.

Cassacawn Millhouse

WRENN ID
calm-string-pearl
Grade
II
Local Planning Authority
Cornwall
Constituency
North Cornwall MP: Ben Maguire (LD)
Country
England
Date first listed
11 November 1987
Type
Millhouse
Address
Cassacawn Millhouse, Blisland, PL30 4JP
OS grid reference
SX 105 729
Coordinates
50.52563, -4.67475
Source
Historic England listing

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

Description

Cassacawn Millhouse is a millhouse dating from the early 19th century. It is constructed of painted stone rubble with granite quoins and features a rag slate roof with gable ends and brick end stacks. The building has a two-room layout with a cross or through passage, heated by end stacks, likely consisting of a larger hall or kitchen on the right and a parlour on the left. There is a rear extension that has been partly remodeled in the 20th century.

The exterior is two storeys high with a regular two-window front, and the entrance is slightly to the left of the center, featuring a 20th-century timber porch. The windows are early 19th-century 16-pane sashes. Inside, there are early 19th-century ceiling beams, although the fireplaces have been remodeled. This millhouse is associated with a mill that may date from the 17th or 18th century, located to the east. The mill's machinery has been removed, and the overshot wheel has been sold; the 17th-century granite fireplace is likely reused from another house.

Local climate

Cassacawn Millhouse sits in a wetter-than-average part of the UK, with an average of 1,010 mm of rain a year. This makes it wetter than 81% 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 13 freeze-thaw cycles a year, fewer than 88% of listed buildings. Of these, 6 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 — 7 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
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