Walls of very large rectangular enclosed garden, Plas Newydd, adjoining square garden on south-west is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 23 April 1998. Garden wall.

Walls of very large rectangular enclosed garden, Plas Newydd, adjoining square garden on south-west

WRENN ID
white-sill-heath
Grade
II
Local Planning Authority
Isle of Anglesey
Constituency
Ynys Môn MP: Llinos Medi (PC)
Country
Wales
Date first listed
23 April 1998
Type
Garden wall
OS grid reference
SH 515 690
Coordinates
53.19764, -4.22409
Source
Cadw listing

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

Description

The high garden wall at Plas Newydd is roughly rectangular in shape and constructed from red brick using English Garden Wall bond. Originally, there were doorways in the center of the north and south walls, but now the entrance is located off-center in the north wall. On the outer side of the north wall, there is a range of buildings that includes rubble walls and a lean-to slate roof. These buildings consist of a boiler house, potting shed, men's luncheon room, and a pump house for the water system, which features a heavy iron water tank above it.

Local climate

Walls of very large rectangular enclosed garden, Plas Newydd, adjoining square garden on south-west sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.

It experiences an average of 23 freeze-thaw cycles a year, fewer than 75% of listed buildings. Of these, 11 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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