Hay-barn to south of Watermill is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 8 September 1998. Hay barn.

Hay-barn to south of Watermill

WRENN ID
gaunt-tallow-nettle
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
8 September 1998
Type
Hay barn
Address
Hay-barn to south of Watermill, Glynllifon, Llandwrog
OS grid reference
SH 454 552
Coordinates
53.07222, -4.30784
Source
Cadw listing

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

Description

The hay barn located to the south of the watermill is a tall, open-sided structure with six bays, built from honey-coloured stone and featuring red brick dressings. It has a half-hipped slate roof. The gable end facing the mill has a tall opening with a slate lintel and patterned ventilation holes above it. On the north-west side, some openings have been partly filled in, but the left-hand side retains its original full-height openings. An added corrugated lean-to is present on this side. The tall opening at the south-west end has also been partly filled in but still features diamond-patterned ventilators above. Inside, the barn has king-post trusses with two tiers of purlins.

Local climate

Hay-barn to south of Watermill sits in one of the wettest parts of the UK, with an average of 1,370 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 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 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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Nearby listed buildings

  1. Stone Bridge to west of Watermill Grade II 43 m
  2. Watermill to south-west of Stables including archway into mill yard and attached L-shaped range Grade II 55 m
  3. Stone Bridge on the main drive south of the Stables at Glynllifon Grade II 76 m
  4. Children's Mill or Boat House Grade II 114 m
  5. Stable Courtyard at Glynllifon Grade II* 123 m
  6. Inner arched entrance to courtyard between Palm House and Workshops Grade II 159 m
  7. Fountain Pool to east of Stable Courtyard Grade II 161 m
  8. Footbridge over service drive to west of Glynllifon House Grade II 162 m
  9. Rubble-walled rear service drive to west of Glynllifon House Grade II 164 m
  10. Machinery Workshops to north-west of Stables at Glynllifon Grade II 167 m