Barn to the S of Llanfair Isaf is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 30 November 1966. Barn.

Barn to the S of Llanfair Isaf

WRENN ID
keen-moat-ash
Grade
II
Local Planning Authority
Snowdonia National Park
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
30 November 1966
Type
Barn
Address
Barn to the S of Llanfair Isaf, Gwynedd
OS grid reference
SH 575 288
Coordinates
52.83803, -4.11696
Source
Cadw listing

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

Description

This building is a barn located to the south of Llanfair Isaf. It is a very long structure made of dry stone rubble with a graded slate roof and a coped lower gable. There are doorways towards the center and the right side of the original range, both featuring rough projecting lintels. An additional doorway is found in a bay to the left, which also includes a loft entry in the gable end. Attached to the right-hand gable end is a range of cart-sheds, which are likely from the 19th century.

Local climate

Barn to the S of Llanfair Isaf sits in one of the wettest parts of the UK, with an average of 1,460 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.

It experiences an average of 31 freeze-thaw cycles a year, fewer than 62% of listed buildings. Of these, 14 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
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  • 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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Nearby listed buildings

  1. Hay barn to the S of Llanfair Isaf Grade II 18 m
  2. Llanfair-Isaf Farmhouse Grade II* 54 m
  3. Ty Mawr Grade II 327 m
  4. Ty'n Llan Grade II 330 m
  5. Sundial at the Church of St Mary Grade II 339 m
  6. Outbuilding to rear of Ty'n Llan Grade II 340 m
  7. Church of St Mary Grade II* 358 m
  8. Llandanwg Farm and attached dwelling to S Grade II 422 m
  9. Barn at Llandanwg Grade II 565 m
  10. Hammel at Llandanwg Grade II 588 m