Walled Garden at Dyffryn House is a Grade II listed building in the Vale of Glamorgan local planning authority area, Wales. First listed on 14 September 1992. Garden.

Walled Garden at Dyffryn House

WRENN ID
roaming-tallow-hemlock
Grade
II
Local Planning Authority
Vale of Glamorgan
Constituency
Vale of Glamorgan MP: Kanishka Narayan (Lab)
Country
Wales
Date first listed
14 September 1992
Type
Garden
Address
Walled Garden at Dyffryn House, St. Nicholas and Bonvilston
OS grid reference
ST 094 724
Coordinates
51.44335, -3.30463
Source
Cadw listing

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

Description

The Walled Garden at Dyffryn House is a structure with rubble walls and flat coping that encloses three sides of the garden, which was identified as the Kitchen Garden on Thomas Mawson's 1926 plan. The fourth side, to the northwest, is bordered by modern glass houses. The garden features round arched entrances with iron gates, and the ground level has been raised. Although it is no longer used as a kitchen garden, it now contains flower beds. At the northeast end, there are additional glass houses that back onto rubble potting sheds and a gardener's building, which is two storeys at the lower end and transitions to a single storey as it ascends the slope.

Local climate

Walled Garden at Dyffryn House sits in a wetter-than-average part of the UK, with an average of 1,090 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.

It experiences an average of 17 freeze-thaw cycles a year, fewer than 83% of listed buildings. Of these, 6 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.

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Nearby listed buildings

  1. Pompeian Garden at Dyffryn House Grade II 104 m
  2. Dyffryn House Grade II* 107 m
  3. Lower South Terrace at Dyffryn Gardens(partly in St Nicholas and Bonvilston Community) Grade II 141 m
  4. Fountain to South of Dyffryn House Grade II 167 m
  5. Fountain to South of Dyffryn House(partly in St Nicholas and Bonvilston Community) Grade II 171 m
  6. Lion steps Grade II 184 m
  7. Vine Walk and Kiosks Grade II 243 m
  8. Well House Grade II 666 m
  9. Former Bull Shed at Nant Bran Farm. Grade II 877 m
  10. Agricultural Range opposite Nant Bran Farmhouse. Grade II 898 m