Castell is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 19 October 1971. Single storey building.

Castell

WRENN ID
tilted-arch-moss
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
19 October 1971
Type
Single storey building
Address
Castell, Llangybi, Pwllheli, Llanystumdwy
OS grid reference
SH 428 411
Coordinates
52.94462, -4.33967
Source
Cadw listing

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

Description

Castell is a single-storey building constructed of rubble stone on boulder foundations, with the walls limewashed. The roof is covered with old slates and features gable stacks with weather courses. Each elevation has a boarded door flanked by small 4-pane sash windows. There is also a very small rooflight towards the left end of the roof slope. Some stones around the door project slightly.

Local climate

Castell sits in one of the wettest parts of the UK, with an average of 1,610 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.

It experiences an average of 11 freeze-thaw cycles a year, fewer than 89% of listed buildings. Of these, 4 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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  • No EPC on record for this property
  • Sale history — 3 transactions since 2004
  • No related consent applications matched
  • 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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