Ceiswyn is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 6 December 1999. Residential.
Ceiswyn
- WRENN ID
- third-merlon-hawk
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 6 December 1999
- Type
- Residential
- Address
- Ceiswyn, Aberllefenni, Machynlleth, Corris, Gwynedd
- OS grid reference
- SH 777 125
- Coordinates
- 52.69699, -3.80988
- Source
- Cadw listing
Description
Ceiswyn is a building made of rubble that was once whitewashed, topped with a slate roof. The front block features slate construction, rock-faced quoins, and window dressings, with slate hung gable ends and a slate roof situated between gable stacks. The earlier section likely includes a living kitchen accessed through a voussoir-arched entrance door facing east, along with an inner room and a farm building with a loft above, positioned uphill in line. There is an external stone stair leading to the loft and one stack at the upper end of the range. The front range is two storeys high, with two bays, a central entrance, and two windows on each floor. All the windows are currently covered with sheeting.
At the time of inspection, the building was not accessible. The Royal Commission on the Ancient and Historical Monuments of Wales reported that it has a lateral stack, post and panel partitions, and an ornate open roof featuring cusping.
Local climate
Ceiswyn sits in one of the wettest parts of the UK, with an average of 1,290 mm of rain a year. This makes it wetter than 94% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.
It experiences an average of 41 freeze-thaw cycles a year, more than 79% of listed buildings. Of these, 22 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
- 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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