Former Watermill at Llwyndu is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 27 November 1986. Watermill.

Former Watermill at Llwyndu

WRENN ID
frozen-flagstone-dock
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
27 November 1986
Type
Watermill
Address
Former Watermill at Llwyndu, Llanaber, Barmouth
OS grid reference
SH 600 185
Coordinates
52.74648, -4.07484
Source
Cadw listing

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

Description

The former watermill at Llwyndu, dated 1883 and initialled DJ, is located above and to the east of the house, facing down across the former farmyard. This building is a single-storey structure with a loft, constructed from rubble and featuring a renewed slate roof. The entrance is off-centre to the left and has full-height stable doors. To the right of the entrance, there is a window with three panes above two sliding boarded panels. A boarded loft door is located on the north gable, and an overshot waterwheel is retained on the south gable, protected by a stone wall.

Inside, the floor is stone flagged, but there is no surviving machinery.

Local climate

Former Watermill at Llwyndu sits in one of the wettest parts of the UK, with an average of 1,410 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 26 freeze-thaw cycles a year, fewer than 72% of listed buildings. Of these, 11 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
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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. Long Barn Range at Llwyndu, including attached Small Range at S End Grade II 17 m
  2. Llwyndu Guest House Grade II 26 m
  3. Dower House at Llwyndu Grade II* 44 m
  4. Former Cowhouse at Llwyndu Grade II 45 m
  5. Milepost Grade II 219 m
  6. Secondary House at Plas Canol ('The Bothy') Grade II 432 m
  7. Plas Canol Grade II* 441 m
  8. Parish Church of Saint Mary and Saint Bodfan Grade I 545 m
  9. Barn at Hendre Coed Isaf Grade II 706 m
  10. Former Domestic/Stable Block ar Hendre Coed Isaf Grade II 716 m