Tremorna is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 22 June 1987. Cottage. 3 related planning applications.

Tremorna

WRENN ID
winding-moulding-elder
Grade
II
Local Planning Authority
Cornwall
Constituency
St Ives MP: Andrew George (LD)
Country
England
Date first listed
22 June 1987
Type
Cottage
Address
Tremorna, Manaccan, TR12 6JX
OS grid reference
SW 757 261
Coordinates
50.09264, -5.13595
Source
Historic England listing

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

Description

Tremorna is a pair of cottages that have been converted into one house, dating from the early 19th century. The building features painted and rendered walls, a scantle slate roof, and a brick chimney located over the cross party wall to the left of the middle. It has a cast iron ogee gutter. The original layout likely consisted of two single-cell cottages with a pair of entrance passages in the middle, but it was remodeled in the 20th century to create three ground floor rooms.

The building is two storeys high and originally had a symmetrical three-window east front with two doorways towards the middle. The left-hand doorway now has a 16-pane, 2-light casement, while the right-hand doorway features an early 20th-century glazed door within a glazed lean-to porch of the same period. The left-hand window on the ground floor has been enlarged in the 20th century and now contains a 24-pane horned sash with a 16-pane horned sash above it. The right-hand window is a 20th-century 16-pane casement, but the other two first-floor windows are the original 16-pane hornless sashes. The interior has not been inspected. Tremorna is part of a group of houses from the late 17th and early 19th centuries located near the head of the creek at Helford.

Local climate

Tremorna receives an average of 870 mm of rain a year. This makes it wetter than 63% 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 3 freeze-thaw cycles a year, fewer than 99% 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 0.2°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.
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  • Related listed building consents — 3 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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