Castell Aberlleiniog is a Grade II* listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 30 January 1968. A C11 Fortification.
Castell Aberlleiniog
- WRENN ID
- distant-render-foxglove
- Grade
- II*
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 30 January 1968
- Type
- Fortification
- Address
- Castell Aberlleiniog, Llangoed
- OS grid reference
- SH 616 793
- Coordinates
- 53.29262, -4.07727
- Source
- Cadw listing
Description
Castell Aberlleiniog is an 11th-century motte that rises to a square platform measuring approximately 50 square meters. It features retaining walls made of rubble masonry, with three remaining round corner bastions. Each bastion includes three rectangular loops with splayed reveals. On the northwest side, there is a projecting garde-robe supported by rough corbels and a stone slab. The battlements on each side wall are reinforced by three buttresses, which are later additions but may replace earlier structures.
Local climate
Castell Aberlleiniog 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 90% of listed buildings.
It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 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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- No EPC on record for this property
- No sale records on file
- 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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