Watermill, Gronant is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 16 February 2001. Watermill.
Watermill, Gronant
- WRENN ID
- second-window-moth
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 16 February 2001
- Type
- Watermill
- Address
- Watermill, Gronant, Holyhead, Llanfaethlu
- OS grid reference
- SH 326 852
- Coordinates
- 53.33764, -4.51545
- Source
- Cadw listing
Description
This is a 2-storey water mill located in Gronant, notable for its unusual picturesque design. It has a square plan and features a pyramidal roof topped with a tall cupola. The walls are made of rubble, and it has a slate roof. There is a door on the right side leading to a ground floor store, and an external stone staircase provides access to the first floor grinding room. The wheelpit at the rear has largely been infilled. The tall louvred cupola has a pointed slated roof. Inside the mill, no machinery remains, although the floor is still intact.
Local climate
Watermill, Gronant sits in a wetter-than-average part of the UK, with an average of 1,030 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.
It experiences an average of 8 freeze-thaw cycles a year, fewer than 93% 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
- No related consent applications matched
- 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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