Boscolla Mill is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 3 February 1986. Millers house. 1 related planning application.
Boscolla Mill
- WRENN ID
- swift-moat-thunder
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- Truro and Falmouth MP: Jayne Kirkham (Lab)
- Country
- England
- Date first listed
- 3 February 1986
- Type
- Millers house
- Address
- Boscolla Mill, Kenwyn, TR4 9ED
- OS grid reference
- SW 802 462
- Coordinates
- 50.2754, -5.08476
- Source
- Historic England listing
Description
Boscolla Mill is an 18th-century miller's house, possibly with an earlier core, and an adjacent house, now combined into a single dwelling. It is constructed of painted stone rubble with rendered cob to the first floor of the front walls. The roof is of scantle slate, double-span with gable ends, the left-hand gable forming a party wall with a neighbouring property. Brick chimneys are visible over the right-hand gable and at the gable ends, with an asbestos slate roof covering the main part of the house to the right.
The main part of the house to the east has a plan of two rooms flanking a wide central passage leading to a central stair. The adjacent house to the left projects forward and features two smaller front rooms, also flanking a passage, with a two-storey service range to the rear under a parallel roof. A further building adjoins that house to the left. The south front features two windows to the left, and a wider, symmetrical three-window front to the main house, which is set back. The central doorway may contain an original four-panel door, and the window openings have 20th-century 2-light casements. The front of the left-hand house presents a nearly symmetrical facade with a central doorway.
The interior, although not inspected, includes an original 18th-century T-stair in the entrance hall, alongside pine muntin and plank partitions.
Local climate
Boscolla Mill receives an average of 890 mm of rain a year. This makes it wetter than 66% 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 6 freeze-thaw cycles a year, fewer than 96% 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 1 transaction since 1997
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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