Groeslon is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 28 May 1999. Cottage.
Groeslon
- WRENN ID
- moated-rubblework-cobweb
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 28 May 1999
- Type
- Cottage
- Address
- Groeslon, Llanberis, Caernarfon
- OS grid reference
- SH 561 611
- Coordinates
- 53.12782, -4.1509
- Source
- Cadw listing
Description
Groeslon is a single-storey cottage featuring a compact two-room layout with a small lean-to attached to the right gable end, where the ground slopes down. The exterior is constructed from roughly coursed rubblestone blocks, some of which are quite large, and it has a slate roof with integral end stacks that include slate drips. The cottage has a later 19th-century slate slab porch at the center, which has a gabled slate slab roof and is flanked by four-paned sash windows with slate cills and lintels. There are also two small windows with slate cills on the back wall. The interior was not accessible during the survey.
Local climate
Groeslon 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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