Piggery at Hafod-y-wern is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 15 September 1999. Agricultural.
Piggery at Hafod-y-wern
- WRENN ID
- lunar-belfry-clover
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 15 September 1999
- Type
- Agricultural
- Address
- Piggery at Hafod-y-wern, Clynnog-Fawr, Caernarfon, Clynnog
- OS grid reference
- SH 419 491
- Coordinates
- 53.01638, -4.35752
- Source
- Cadw listing
Description
The piggery at Hafod-y-wern is located at the northern corner of the farmyard, next to the entrance. It is constructed from local stone rubble and features slate roofs with imposed copings. The building comprises three pig sties, each with walled runs and a slate feeding trough facing the farmyard. Attached to one end is a taller pig-swill boiler house, which has a gabled front but is set back behind a narrow walled front yard. This boiler house has a pitched roof and a gable door, and inside, there are three hearths for boilers at the northeast end that lead into a single stack. At the back corner, near the entrance to the farmyard, there are circular stone gatepiers, with the opposite one located in a corner of the front garden wall of the house. The boiler house also has one side window.
Local climate
Piggery at Hafod-y-wern sits in one of the wettest parts of the UK, with an average of 1,710 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It experiences an average of 7 freeze-thaw cycles a year, fewer than 95% of listed buildings. Of these, 2 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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