Altarnun is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 28 August 1987. A Early C19 House.

Altarnun

WRENN ID
standing-quoin-poplar
Grade
II
Local Planning Authority
Cornwall
Constituency
St Austell and Newquay MP: Noah Law (Lab)
Country
England
Date first listed
28 August 1987
Type
House
Address
Altarnun, Fore Street, St. Sampson
OS grid reference
SX 122 547
Coordinates
50.36227, -4.64138
Source
Historic England listing

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

Description

This is a house located in Altarnun, dating from the early 19th century, with few later alterations. The building is constructed of slatestone rubble with a rendered front and features a slurried slate roof with gable ends, although the stacks have been removed. The layout consists of a two-room plan, with one room at the front and another at the rear on the right side, and the entrance is located on the left. There is a single-storey outshut along the entire rear, which is heated by a stack at the back. The house stands two storeys high on a plinth and has two windows, all of which are 16-pane sashes set in plain raised architraves. To the left, there is a four-panelled and glazed door with a 20th-century flat hood above it. On the left side of the building, there is a single-storey covered passage with a 20th-century door at the front. At the rear, the roof extends in a catslide over the outshut. The interior has not been inspected.

Local climate

Altarnun 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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