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

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

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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  2. Secondary House at Garth Isaf Grade II 33 m
  3. Former Barn at Garth Isaf Grade II 49 m
  4. Milepost Grade II 445 m
  5. SW Lodge to Garth Angharad Grade II 894 m
  6. Cefn-Hir-Uchaf Grade II 1.3 km
  7. Ty'n-y-Coed Grade II 1.5 km
  8. Y Bont Grade II 1.6 km
  9. Y Bont Grade II 1.6 km
  10. Y Bont Grade II 1.6 km