Alltwen is a Grade II listed building in the Ceredigion local planning authority area, Wales. First listed on 21 February 1996. House.
Alltwen
- WRENN ID
- low-fireplace-torch
- Grade
- II
- Local Planning Authority
- Ceredigion
- Constituency
- Ceredigion Preseli MP: Ben Lake (PC)
- Country
- Wales
- Date first listed
- 21 February 1996
- Type
- House
- Address
- Alltwen, Aberaeron, Henfynyw
- OS grid reference
- SN 465 611
- Coordinates
- 52.22703, -4.24795
- Source
- Cadw listing
Description
Alltwen is a single-storey building featuring roughcast walls and a slate veranda roof with roughcast end stacks, which are large and square on the left side. The front has two windows that are recessed under an overhanging roof supported by three plain thin iron posts. The windows are Gothic in style, pointed with intersecting tracery at the tops and six-pane lights below. There is a door located on the left end wall.
Local climate
Alltwen sits in one of the wettest parts of the UK, with an average of 1,270 mm of rain a year. This makes it wetter than 93% 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 26 freeze-thaw cycles a year, fewer than 72% of listed buildings. Of these, 13 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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