Berth-ddu is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 27 February 2004. Farmhouse.
Berth-ddu
- WRENN ID
- spare-obsidian-peregrine
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 27 February 2004
- Type
- Farmhouse
- Address
- Berth-ddu, Nant Bryn Llefrith, Trawsfynydd, Gwynedd
- OS grid reference
- SH 709 339
- Coordinates
- 52.88736, -3.92003
- Source
- Cadw listing
Description
Berth-ddu is a 2-storey farmhouse featuring a symmetrical 3-window front with a central entrance. The exterior has smooth rendered walls and a hipped slate roof with stone stacks at one end and a rendered stack at the other. The central door has a shallow overlight above it, and there are 16-pane sash windows on either side. The upper floor has similar windows, although the ones above the doorway are narrower.
Local climate
Berth-ddu sits in one of the wettest parts of the UK, with an average of 1,390 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 94% of listed buildings.
It experiences an average of 44 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 25 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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