Alltgochymynydd is a Grade II listed building in the Ceredigion local planning authority area, Wales. First listed on 19 September 1997. House.

Alltgochymynydd

WRENN ID
mired-pewter-willow
Grade
II
Local Planning Authority
Ceredigion
Constituency
Ceredigion Preseli MP: Ben Lake (PC)
Country
Wales
Date first listed
19 September 1997
Type
House
Address
Alltgochymynydd, Cwm Tynant, Aberystwyth, Ceulanamaesmawr
OS grid reference
SN 707 881
Coordinates
52.47562, -3.90458
Source
Cadw listing

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

Description

Alltgochymynydd is a two-storey building constructed from whitewashed rubble stone and topped with a steep-pitched slate roof, featuring larger stone stacks at the left end. The front is irregular and long, with a two-unit plan. On the first floor, there are two widely separated pairs of casement windows positioned under the eaves. The ground floor has a pair of casement windows to the right, which align with the window above. There is an off-centre ledged door, followed by another casement pair set to the right of the window above, and a very small fire-window. The windows are adorned with stone slab lintels. At each end of the property, there are ruined stone outbuildings. At the rear, there is a centrally located lean-to roofed with slate, and no outshut is present.

Local climate

Alltgochymynydd 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 95% 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 35 freeze-thaw cycles a year, more than 57% of listed buildings. Of these, 18 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
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  • 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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  9. Outbuilding at Y Felin Grade II 3.0 km
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