Walled garden at Gyrn Castle is a Grade II listed building in the Flintshire local planning authority area, Wales. First listed on 30 April 2001. Garden.

Walled garden at Gyrn Castle

WRENN ID
ghost-corbel-crow
Grade
II
Local Planning Authority
Flintshire
Constituency
Clwyd East MP: Becky Gittins (Lab)
Country
Wales
Date first listed
30 April 2001
Type
Garden
Address
Walled garden at Gyrn Castle, Llanasa, CH8 9BG
OS grid reference
SJ 111 815
Coordinates
53.32314, -3.33548
Source
Cadw listing

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

Description

The walled garden at Gyrn Castle is a long, narrow garden situated on a south-facing sloping site, with the north wall being taller than the south wall. The west side of the garden is narrower than the east side. The walls are made of embattled rubble stone, except for the curving southwest end, which lacks battlements and is likely older. In the southwest corner, there is a polygonal castellated turret, and to the left of this turret is a segmental-headed doorway that features a replaced door with vertical ribs. The internal north wall is buttressed, and on its outer northeast side, there is an added projection. Additionally, a former garden terrace was built against the outer south wall.

Local climate

Walled garden at Gyrn Castle sits in a wetter-than-average part of the UK, with an average of 980 mm of rain a year. This makes it wetter than 78% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 56% of listed buildings.

It experiences an average of 19 freeze-thaw cycles a year, fewer than 80% of listed buildings. Of these, 10 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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