Ellen's Tower (Twr Ellin) is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 26 March 1973. Folly.
Ellen's Tower (Twr Ellin)
- WRENN ID
- winter-loft-weasel
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 26 March 1973
- Type
- Folly
- Address
- Ellen's Tower (Twr Ellin), Holyhead Mountain, Trearddur
- OS grid reference
- SH 206 819
- Coordinates
- 53.30444, -4.6933
- Source
- Cadw listing
Description
Ellen's Tower, also known as Twr Ellin, is a picturesque castellated folly built in 1868. It is two stories high and square in plan, featuring an advanced, raised tower at the southeast corner. The structure is made of rubble masonry and is roughcast rendered, topped with a flat roof and a projecting crenellated parapet.
The tower includes a square-headed entrance on the lower level, with a single square-headed light above and 'arrow slits' on each face of the tower. To the right of the main entrance, there is another square-headed doorway with a slate plaque above that reads: "TWR ELLIN, ERECTED IN 1868, BY ELLIN, WIFE OF THE HONBLE W. OWEN STANLEY, M.P. OF PENRHOS, MAY ALL WHO VISIT THIS PLACE BLESS HER MEMORY. BENDITHIED PAWB A YMWELANT A'R LLE HWN EI CHOFFADWRIATH." The right return and rear walls feature large three-pane windows, while the left return has a smaller single-pane light.
Local climate
Ellen's Tower (Twr Ellin) 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
Sign in or create a free account to unlock:
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
this building 1 similar nearby listed buildings
Nearby listed buildings
- Bridge Towers at South Stack Lighthouse
- Former Oil Store at South Stack Lighthouse
- Enclosure Walls at South Stack Lighthouse
- Storehouse at South Stack Lighthouse
- South Stack Lighthouse and former keepers' accommodation
- Tan-y-Cytiau
- Ffynnon y Wrach
- Former powder magazine for fog signalling station and enclosure walls
- Cottage on corner of Pentre Pella (including Foregardem Wall)
- Gunpowder Magazine