Walton Castle is a Grade II listed building in the North Somerset local planning authority area, England. First listed on 22 July 1987. Castle. 2 related planning applications.

Walton Castle

WRENN ID
drifting-cellar-myrtle
Grade
II
Local Planning Authority
North Somerset
Constituency
North Somerset MP: Sadik Al-Hassan (Lab)
Country
England
Date first listed
22 July 1987
Type
Castle
Address
Walton Castle, Clevedon, BS21 7AA
OS grid reference
ST 415 728
Coordinates
51.45175, -2.84231
Source
Historic England listing

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

Description

Walton Castle is a castle keep house built between 1615 and 1620 for Lord Poulett, with significant rebuilding occurring in the late 20th century. The structure is made of rubble with rendered surfaces and stone dressings, topped with asphalt roofs, which have not been inspected. It features an octagonal keep with three floors and a cellar, along with a two-storey rectangular porch on the north side and a polygonal stair turret on the southeast. The windows include one or two-light casements with stone surrounds, some featuring transoms, and a three-light window at the ground floor. The entrance has an early pair of panelled and battened doors, relocated from another site, accessed by five stone steps. The building has a plinth mould, two string courses, a cornice, and a blocking course, with additional steps leading to the cellar level next to the stair turret. This unusual castle folly is situated on a prominent site overlooking the Bristol Channel and was long abandoned and in ruins before being restructured and made habitable again in the late 20th century. While most of the current structure dates from this later period, the keep retains some historical significance alongside the surrounding curtain walls and towers.

Local climate

Walton Castle receives an average of 860 mm of rain a year. This makes it wetter than 60% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 64% of listed buildings.

It experiences an average of 33 freeze-thaw cycles a year, fewer than 56% of listed buildings. Of these, 13 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.
  • No sale records on file
  • Related listed building consents — 2 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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  5. Church of St Mary Grade II 662 m
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  9. Old Park House Grade II 992 m
  10. Church of All Saints Grade II 1.0 km