Tan-y-graean is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 4 November 1999. Cottage.
Tan-y-graean
- WRENN ID
- dim-hinge-amber
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 4 November 1999
- Type
- Cottage
- Address
- Tan-y-graean, Llanymawddwy, Machynlleth, Mawddwy, Gwynedd, SY20 9AQ
- OS grid reference
- SH 902 189
- Coordinates
- 52.75694, -3.62822
- Source
- Cadw listing
Description
Tan-y-graean and Pen-y-graean are two cottages built from snecked squared rubble stone, featuring some large blocks, and topped with slate roofs. Each cottage is two storeys high, with two bays. They have a central four-panelled door with a plain overlight, which is set under a lean-to canopy supported by shaped brackets. On either side of the porch, there is a larger two-light six-pane casement window, and similar but slightly smaller windows are located on the upper floor within raised and gabled dormers. The cottages have deep eaves and gable end stacks that include clayware ventilation pots, with the two stacks at the center combined into a single square stack. The shaped purlin ends project out to support the wide verge.
Tan-y-graean features a central entrance door that is enclosed in a gabled porch, with the door re-fixed to the outside. The gable end stack of Tan-y-graean has been rebuilt.
Local climate
Tan-y-graean sits in one of the wettest parts of the UK, with an average of 1,190 mm of rain a year. This makes it wetter than 91% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 82% of listed buildings.
It experiences an average of 54 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 34 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 — 1 transaction since 2020
- 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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