Glanllyn Cottage is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 30 December 2004. Cottage.
Glanllyn Cottage
- WRENN ID
- winter-panel-yew
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 30 December 2004
- Type
- Cottage
- Address
- Glanllyn Cottage, Llandecwyn, Talsarnau, Gwynedd
- OS grid reference
- SH 627 370
- Coordinates
- 52.91324, -4.04225
- Source
- Cadw listing
Description
Glanllyn Cottage is a linear cottage range built in the 19th century, originally consisting of three separate cottages. It is two storeys high, with each cottage featuring a doorway flanked by small ground floor windows. There is an outshot at the right (south) end of the building. The structure is made of mortared rubble masonry and has a modern slate roof with a tiled ridge.
There are three chimneys along the range; the one at the left gable is a large rectangular stack with dripstones and capping, while a similar stack is located between the second and third cottages. The right gable has a narrower stack.
The left cottage has a modern half-glazed doorway with a small single-paned window to the right (south) and ground and first floor two-pane casement windows to the left. The central cottage features a similar door flanked by two-pane horizontally sliding sash windows. The right cottage has a lower roofline and contains a modern boarded door with four-pane lights on either side, while the outshot also has a boarded door with a four-pane light to the right (south).
The interior could not be inspected during the survey.
Local climate
Glanllyn Cottage sits in one of the wettest parts of the UK, with an average of 1,450 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.
It experiences an average of 36 freeze-thaw cycles a year, more than 60% 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
- 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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