Trefeilir is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 5 February 1952. House.
Trefeilir
- WRENN ID
- pale-plinth-gilt
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 5 February 1952
- Type
- House
- Address
- Trefeilir, Bethel, Bodorgan
- OS grid reference
- SH 401 712
- Coordinates
- 53.21401, -4.39571
- Source
- Cadw listing
Description
Trefeilir is a three-storey building from the 18th century, featuring a six-window front on the south side and a modern three-window gabled wing to the east. The roof has been renewed with slates. There are hipped dormers on the second floor, located on each side of the central gable, which has moulded coping and restored finials at both the apex and the bases. The exterior is made of coursed dressed limestone, and the flat heads of the windows include a central voussoir. The first-floor windows are near flush frame sash windows with glazing bars, while the ground floor has casement windows, also with glazing bars. The ends and the wing return at right angles to the west are rendered. The building features tall chimneys with dripstones and capping.
Inside, the interior has been much altered but includes windows with deep reveals and field panelling, a restored 18th-century stair, and an early 16th-century stone fireplace located in the rear wing.
Local climate
Trefeilir sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.
It experiences an average of 11 freeze-thaw cycles a year, fewer than 90% 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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