Pigsty and boiling house at Trefarthen is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 20 May 1998. House.
Pigsty and boiling house at Trefarthen
- WRENN ID
- deep-grate-owl
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 20 May 1998
- Type
- House
- Address
- Pigsty and boiling house at Trefarthen, Llanidan
- OS grid reference
- SH 482 661
- Coordinates
- 53.17057, -4.27176
- Source
- Cadw listing
Description
The building is a combined boiling house and pigsty range, dating from the 19th century. The boiling house has a rectangular shape, featuring a door on the south gable wall and a window on the side wall that faces the farmyard. It is constructed with rubble walls and has a pitched slate roof with slate copings, along with a brick chimney located at the northwest corner opposite the door. The pigsty consists of two units and is attached to the north gable end of the boiling house. It also has rubble walls and a single pitch slate roof with slate copings. There are stone walls surrounding the yard, although the wall to the right (north) has been demolished.
Local climate
Pigsty and boiling house at Trefarthen sits in one of the wettest parts of the UK, with an average of 1,190 mm of rain a year. This makes it wetter than 91% 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 16 freeze-thaw cycles a year, fewer than 84% of listed buildings. Of these, 6 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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