Cottage at Garth Isaf is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 1 February 1995. Cottage.
Cottage at Garth Isaf
- WRENN ID
- low-sill-rye
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 1 February 1995
- Type
- Cottage
- Address
- Cottage at Garth Isaf, Arthog, Gwynedd
- OS grid reference
- SH 653 160
- Coordinates
- 52.72492, -3.99475
- Source
- Cadw listing
Description
Garth Isaf is a one-and-a-half storey cottage that has two main construction periods. The right section is likely from the 17th century, while a lateral chimney was added to the rear and a further bay was added to the north during the second quarter of the 18th century. The building is made of rubble and features a steeply-pitched renewed slate roof, which is hipped to the south and has a coped and kneelered gable parapet to the north.
There are 12-pane sash windows on both floors, with the upper windows set within gabled dormers. The entrance is located on the narrow south face and has a plain boarded door. Above the entrance is a coped and kneelered rubble gabled dormer. On the west face, there are three windows on the ground floor, with two 20th-century dormers above. The north gable has modern windows. The northeast corner of the cottage is corbelled out in two stages, with the lower section trimmed where it extends into the former road.
At the rear, there is an advanced left section featuring a gabled, coped and kneelered stack with capping and weather coursing, also dating from the 18th century. Inside, rough roof timbers are visible, indicating that the hipped arrangement is 18th-century work.
Local climate
Cottage at Garth Isaf 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 95% of listed buildings.
It experiences an average of 28 freeze-thaw cycles a year, fewer than 69% of listed buildings. Of these, 13 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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