Grimshall is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 30 April 1985. House.
Grimshall
- WRENN ID
- tangled-window-sedge
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- South East Cornwall MP: Anna Gelderd (Lab)
- Country
- England
- Date first listed
- 30 April 1985
- Type
- House
- Address
- Grimshall, Boconnoc
- OS grid reference
- SX 145 591
- Coordinates
- 50.40287, -4.61043
- Source
- Historic England listing
Description
Grimshall is a house dating from the early to mid 17th century. It is constructed of rubble stone and cob, with a rendered finish and a slate roof featuring brick stacks at the gabled ends. The building has a single depth plan comprising two rooms with a cross passage and an altered dairy at the rear.
The house is two storeys high with an asymmetrical front that has three windows. On the ground floor, there is a 2-light casement window with glazing bars to the left, set in a partly blocked larger opening that is visible from inside, and a 3-light casement window with glazing bars to the right. A partly glazed panelled door is positioned to the right of centre. On the first floor, there are three 2-light timber casement windows with glazing bars and crown glass.
Inside, the left-hand room features chamfered ceiling beams that are closely spaced, with plain stops on the south side. In the left-hand west gable end on the first floor, there is a partly blocked 3-light timber mullioned window with ovolo moulding. The interior frame is unmoulded, while the exterior shows ovolo moulding. Above the window in the first floor east room, there is a reused moulded timber beam, possibly a reduced fireplace lintel, with another part inserted above the internal door to the dairy.
The roof consists of seven bays with trenched purlins and chamfered cambered collars on eight principal rafters. The collars are halved, notched, and pegged, and carpenter's marks can be seen throughout.
Local climate
Grimshall 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 91% of listed buildings.
It experiences an average of 9 freeze-thaw cycles a year, fewer than 92% of listed buildings. Of these, 3 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
- No related consent applications matched
- 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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