Devils Roost is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 12 March 1986. House.

Devils Roost

WRENN ID
shadowed-gravel-russet
Grade
II
Local Planning Authority
Cornwall
Constituency
Truro and Falmouth MP: Jayne Kirkham (Lab)
Country
England
Date first listed
12 March 1986
Type
House
Address
Devils Roost, Tregew Road, Mylor
OS grid reference
SW 809 347
Coordinates
50.17181, -5.06852
Source
Historic England listing

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

Description

Devil's Roost, also known as Grove Cottage on late 19th-century maps, is a house dating from the early 19th century. It was built as a dower house for the Trefusis Family. The front is stuccoed, while the rest is painted rubble, topped with a flipped grouted scantle slate roof featuring wide eaves with lozenge decoration on the soffit plaster. It has cast iron ogee gutters and rendered brick chimneys on the side walls and over the cross wall of the rear wing.

The house has a symmetrical two-window southeast front with a plinth, keyed stucco arches, and a mid-floor band. The original hornless paired sash windows have uncentred pointed arched lights. The first-floor windows are set within three-sided arched openings and feature paired sashes with a central mullion and branching Y bars. There is a doorway to the right of the right-hand side wall, leading to an original wooden porch that has 20th-century granite posts replacing the original columns. The porch includes a moulded cornice, latticed soffit detail, a panelled ceiling, and pilasters flanking the doorway, which contains a six-panelled door with intersecting glazing in the rectangular fanlight and panelled reveals.

Inside, the layout remains largely unchanged since it was built, retaining most of the original carpentry and joinery. The open-well open-string staircase has carved tread ends, stick balusters, and a mahogany handrail. Each reception room features plaster ceilings with trailing bands, while the first room of the wing has slate flags and panelled doors throughout. The house maintains an early 19th-century plan arrangement with an original side entrance and no central front door.

Local climate

Devils Roost receives an average of 850 mm of rain a year. This makes it wetter than 59% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 84% of listed buildings.

It experiences an average of 7 freeze-thaw cycles a year, fewer than 95% 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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  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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