Icehouse at Plas Gwyn is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 14 January 2003. Icehouse.

Icehouse at Plas Gwyn

WRENN ID
hushed-kitchen-mist
Grade
II
Local Planning Authority
Isle of Anglesey
Constituency
Ynys Môn MP: Llinos Medi (PC)
Country
Wales
Date first listed
14 January 2003
Type
Icehouse
Address
Icehouse at Plas Gwyn, Plas Gwyn Estate, Pentraeth
OS grid reference
SH 528 782
Coordinates
53.2807, -4.20822
Source
Cadw listing

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

Description

The icehouse at Plas Gwyn is set into a ridge to the north of the house. It features a brick tunnel entrance, and its arched roof is covered with soil. There is a small rectangular forecourt with three or four slate steps leading down to the entrance. The passage originally had three doors, and the chamber inside is ovoid in shape.

Local climate

Icehouse at Plas Gwyn 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.

More on this building

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  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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