Lavethan Mill is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 11 November 1987. Watermill. 1 related planning application.

Lavethan Mill

WRENN ID
quartered-spire-meadow
Grade
II
Local Planning Authority
Cornwall
Constituency
North Cornwall MP: Ben Maguire (LD)
Country
England
Date first listed
11 November 1987
Type
Watermill
Address
Lavethan Mill, Blisland, PL30 4QG
OS grid reference
SX 090 730
Coordinates
50.52602, -4.69503
Source
Historic England listing

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

Description

Lavethan Mill is an early 19th-century watermill with an adjoining barn, built on the site of an earlier mill and incorporating some dressed stone from that structure. The mill is constructed of stone rubble with granite quoins, and has a slate roof with gable ends, the north-east section being higher. The plan combines the watermill on the south side with an overshot wheel, and an adjoining barn to the south-west. The mill’s south elevation has a three-storey section with meal floor, full stone floor, bin floor and high-level gallery. The barn has a two-storey elevation. A waterwheel is located on the south elevation. A chamfered granite four-centred arch with a keyblock on the north elevation is inscribed with ‘....16 WH 168 - I. May -’, and is believed to have been reused from the earlier building. The interior contains one millstone, a meal floor, a stone floor, a bin floor, and a high-level gallery. The watermill remains in full use, although the original millstones have been replaced by modern machinery. Originally known as 'Queens Mill', it was closely associated with Lavethan House. Further details are given in Maclean's Parochial and Family History of the Deanery of Trigg Minor in the County of Cornwall 1875.

Local climate

Lavethan Mill 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 1 transaction since 2006
  • Related listed building consents — 1 application
  • 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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