Threshing Barn of Henblas is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 30 January 1968. Barn. 3 related planning applications.

Threshing Barn of Henblas

WRENN ID
solemn-cornice-sage
Grade
II
Local Planning Authority
Isle of Anglesey
Constituency
Ynys Môn MP: Llinos Medi (PC)
Country
Wales
Date first listed
30 January 1968
Type
Barn
Address
Threshing Barn of Henblas, Bodorgan, Llangristiolus
OS grid reference
SH 419 723
Coordinates
53.22443, -4.36861
Source
Cadw listing

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

Description

The Threshing Barn of Henblas is a large rectangular structure built from local rubble masonry, featuring ashlar dressings, massive quoins, and boulder foundations. It has opposing central doorways with segmental voussoir heads and chamfered jambs. Above the eastern doorway, there is a much-weathered inscribed date stone displaying a lion rampant reguardant along with the initials and date M / H E 1733. Smaller doorways, which have large chamfered stone lintels and chamfered jambs, are offset to the northern end. The barn includes ventilation slits arranged in two rows of ten along the eastern and western elevations, and two rows of three in the gables, with a single vent above two in the gable apex. The lower row features a continuous sill band that acts as a dripcourse, and the northern gable has a weathered finial. Currently, the barn is completely roofless, although some original fallen timbers remain. The barn consists of three large bays, with some original tie beams that still have angled braces and wall posts. The eastern door retains partial remains of the original studded boarded door, along with a single hinge that has a splayed end.

Local climate

Threshing Barn of Henblas sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% 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 11 freeze-thaw cycles a year, fewer than 90% of listed buildings. Of these, 3 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
  • Related listed building consents — 3 applications
  • 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. Gate piers at drive entrance of Henblas Grade II 316 m
  2. Henblas Lodge Grade II 324 m
  3. Coach House Grade II 350 m
  4. Stable range, Henblas Grade II 351 m
  5. Henblas Grade II* 366 m
  6. Cefn Llwyn Grade II 538 m
  7. Agricultural range, Bodrwyn Grade II 1.0 km
  8. 'Old house' at Bodrwyn, and attached agricultural range Grade II 1.0 km
  9. Bodrwyn Grade II 1.1 km
  10. Capel Horeb and chapel house Grade II 1.2 km