Summerhouse Tower is a Grade II listed building in the Vale of Glamorgan local planning authority area, Wales. First listed on 16 December 2004. Tower.

Summerhouse Tower

WRENN ID
buried-truss-blackthorn
Grade
II
Local Planning Authority
Vale of Glamorgan
Constituency
Vale of Glamorgan MP: Kanishka Narayan (Lab)
Country
Wales
Date first listed
16 December 2004
Type
Tower
Address
Summerhouse Tower, Boverton, Cowbridge / Y Bont-Faen, Llantwit Major
OS grid reference
SS 994 664
Coordinates
51.38842, -3.44685
Source
Cadw listing

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

Description

Summerhouse Tower is an octagonal tower built from local limestone rubble, located in the center of the fort. It has two storeys and likely featured a viewing platform on the roof, although this is now significantly damaged. The remaining windows are either openings or blocked. There is a doorway on the north side with an almost flat arch.

Inside, the tower had two internal floors. Evidence of a fireplace can be found in the main room, but there is no indication of a staircase.

Local climate

Summerhouse Tower sits in a wetter-than-average part of the UK, with an average of 1,160 mm of rain a year. This makes it wetter than 89% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 13 freeze-thaw cycles a year, fewer than 87% of listed buildings. Of these, 5 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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Nearby listed buildings

  1. Summerhouse Fort Grade II 11 m
  2. Batslays Farmhouse Grade II 1.5 km
  3. Orchard House Grade II 2.1 km
  4. Boverton Park House Grade II 2.2 km
  5. Boverton Place including attached bee-boles Grade II* 2.2 km
  6. Tudor Cottage Grade II 2.2 km
  7. Cherry Tree Cottage Grade II 2.2 km
  8. Wall and Gateway opposite Boverton House Grade II 2.2 km
  9. West Farmhouse Grade II 2.2 km
  10. Garden Walls and Railings of Boverton House Grade II 2.2 km