Trelean is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 14 January 1988. A C19 House. 8 related planning applications.

Trelean

WRENN ID
dim-dormer-gorse
Grade
II
Local Planning Authority
Cornwall
Constituency
St Ives MP: Andrew George (LD)
Country
England
Date first listed
14 January 1988
Type
House
Address
Trelean, 20, Calais Road, St. Erth, TR27 6EG
OS grid reference
SW 577 351
Coordinates
50.16679, -5.39331
Source
Historic England listing

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

Description

This is a house, likely dating from the mid-19th century. It is constructed with stucco on the front elevation, and painted rubble elsewhere. The roof is covered with scantle slate, with brick chimneys rising over the gable ends. The original plan suggests a double-depth layout, likely including a living room to the right and a parlour to the left, flanking a cranked-on-plan passage and staircase leading to service rooms at the rear. The west front is nearly symmetrical with three windows, and a doorway positioned slightly left of centre, with a window above. A 20th-century door now occupies the entrance. The original windows are 12-pane hornless sashes, present on both the front and rear elevations. The interior has not been inspected.

Local climate

Trelean receives an average of 910 mm of rain a year. This makes it wetter than 68% 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 4 freeze-thaw cycles a year, fewer than 98% of listed buildings. Of these, 1 follows 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 2010
  • Related listed building consents — 8 applications
  • 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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Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.

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