Melin Llanddyfnan aka Pen y fan is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 12 May 1970. Tower, windmill. 1 related planning application.
Melin Llanddyfnan aka Pen y fan
- WRENN ID
- standing-pavement-elm
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 12 May 1970
- Type
- Tower, windmill
- OS grid reference
- SH 483 786
- Coordinates
- 53.28271, -4.27579
- Source
- Cadw listing
Description
Melin Llanddyfnan, also known as Pen y fan, is a three-storey circular windmill tower. It is constructed from coursed rubble masonry and is rendered. The original window openings feature slate sills, but they now have metal framed casement windows, with one window infilled with brick. The doorway has been enlarged and fitted with modern boarded doors.
The interior was not inspected during the survey, but the owner has stated that it does not contain any of the original mill machinery. There is a staircase leading up to a viewing platform on the roof.
Local climate
Melin Llanddyfnan aka Pen y fan sits in a wetter-than-average part of the UK, with an average of 1,070 mm of rain a year. This makes it wetter than 86% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.
It experiences an average of 14 freeze-thaw cycles a year, fewer than 87% of listed buildings. Of these, 5 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°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 — 1 application
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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