Sunnymede is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 19 October 1987. House.

Sunnymede

WRENN ID
south-quartz-primrose
Grade
II
Local Planning Authority
Cornwall
Constituency
South East Cornwall MP: Anna Gelderd (Lab)
Country
England
Date first listed
19 October 1987
Type
House
Address
Sunnymede, Under Road, Calstock
OS grid reference
SX 432 715
Coordinates
50.52247, -4.2121
Source
Historic England listing

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

Description

Sunnymede is a house located on Under Road in Gunnislake, likely built in the late 17th century to early 18th century, with later additions from the 18th century and alterations in the 20th century. The building is constructed of stone rubble, with the front painted and partly rendered. It features a slurried slate roof with ridge tiles and gable ends, along with gable end stacks that have rubble shafts.

The layout consists of a two-room plan with a central entrance, where each room is heated by a gable end stack. In the late 18th century, a single-storey outshut was added to the rear, creating a two-room service range, with each room also heated from a stack on the outer side. A 20th-century porch has been added to the front, along with a lean-to on the right side.

The exterior is two storeys high with a symmetrical three-window front. The first floor has two-light casements on the right and left, and a 19th-century four-pane sash window in the centre. The ground floor features a central 20th-century lean-to porch with a plain inner door, and two-light casements on either side. The left side is rendered and has a four-pane light at ground floor to the right. There is a 20th-century light in the outshut. The right side includes a single-storey lean-to with two doors. At the rear, the outshut has a catslide roof that aligns with the main range, featuring two 20th-century windows at ground floor and a small single-storey addition to the left. The interior has not been inspected.

Local climate

Sunnymede sits in a wetter-than-average part of the UK, with an average of 1,000 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 81% of listed buildings.

It experiences an average of 17 freeze-thaw cycles a year, fewer than 84% of listed buildings. Of these, 7 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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  • 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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