Bwthyn is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 21 July 2000. Cottage.
Bwthyn
- WRENN ID
- buried-rotunda-merlin
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 21 July 2000
- Type
- Cottage
- Address
- Bwthyn, Nantlle, Caernarfon, Llanllyfni, Gwynedd
- OS grid reference
- SH 541 534
- Coordinates
- 53.05825, -4.17726
- Source
- Cadw listing
Description
Bwthyn is a row of three copper miners' cottages built in the mid-19th century. The cottages are constructed from roughly coursed rubblestone, with the left part painted, and feature a large graded slate roof. They are single storey and have a long rectangular plan, although the right cottage is now abandoned.
The cottages originally had six mid-19th century plate glass sash windows in their original openings, but now have five, positioned on either side of regularly spaced plank doors. Each cottage has integral end stacks and two ridge stacks, all equipped with slate drips, with the ridge stacks shared between the cottages. The right cottage has a widened entrance at the front, replacing the original doorway and right window. The left and centre cottages still have their original drystone-walled garden enclosures at the front.
The interior was not inspected during the survey.
Local climate
Bwthyn sits in one of the wettest parts of the UK, with an average of 1,380 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 25 freeze-thaw cycles a year, fewer than 73% of listed buildings. Of these, 12 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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