Sea Thatch is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 31 October 1988. House.

Sea Thatch

WRENN ID
shifting-render-onyx
Grade
II
Local Planning Authority
Cornwall
Constituency
Camborne and Redruth MP: Perran Moon (Lab)
Country
England
Date first listed
31 October 1988
Type
House
Address
Sea Thatch, Quay Road, St. Agnes
OS grid reference
SW 721 512
Coordinates
50.3168, -5.20172
Source
Historic England listing

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

Description

Sea Thatch is a house that likely dates from the 18th century, with extensions added in the 19th and 20th centuries. It features walls made of killas rubble and timber lintels above the openings. The original part of the house has a wheat reed thatched roof, while the 19th-century extension has a grouted scantle slate roof. The original house, located on the left, consists of two rooms with what is probably a lobby entrance between them, and there is likely an integral stair outshut behind the left-hand room. The right side has a one-room plan 19th-century extension, and there is a small 20th-century extension at the rear. The building is two storeys high and has an overall four-window front. The original house displays a symmetrical three-window front with a central doorway, which features a 20th-century door and 12-pane, two-light casements, all in their original openings. The interior has not been inspected.

Local climate

Sea Thatch receives an average of 920 mm of rain a year. This makes it wetter than 70% 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, 2 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 — 3 transactions since 1998
  • No related consent applications matched
  • 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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