Darch Cottage and Trethewell Cottage is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 25 June 1985. Cottage. 1 related planning application.
Darch Cottage and Trethewell Cottage
- WRENN ID
- quiet-bastion-lark
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- Truro and Falmouth MP: Jayne Kirkham (Lab)
- Country
- England
- Date first listed
- 25 June 1985
- Type
- Cottage
- Address
- Darch Cottage and Trethewell Cottage, St. Just-In-Roseland, TR2 5JE
- OS grid reference
- SW 855 359
- Coordinates
- 50.18452, -5.00512
- Source
- Historic England listing
Description
Darch Cottage and Trethewell Cottage are two adjoining cottages dating from the 18th century, with extensions to the rear in the 20th century. The walls are of cob, rendered in the 20th century. Darch Cottage, on the left, has a corrugated asbestos sheet roof, while Trethewell Cottage, on the right, has asbestos slates. The roofs are pitched across two levels, with brick chimneys positioned over the gable ends and the central party wall. The cottages were originally thatched. Each cottage comprises two rooms arranged around a central staircase.
The south front of each cottage is nearly symmetrical, featuring two windows and a central doorway. The doorways have 20th-century doors, and the windows are two-light casements. Darch Cottage retains its original outer frames and mullions, with ovolo mouldings. The interior of Darch Cottage includes original 18th-century pine muntin and plank partitions, and bowtell moulded ceiling beams. A fireplace in the left-hand room is partially built into a bank supporting the road. The roof structure and interior of Trethewell Cottage were not inspected. An old postcard photograph held by the NMR shows the cottages in the early 20th century, with thatched roofs and exposed cob walls.
Local climate
Darch Cottage and Trethewell Cottage 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 9 transactions since 1998
- 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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