Boiling house and pigsty at Prysan-fawr is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 4 March 1998. Boiling house, pigsty.

Boiling house and pigsty at Prysan-fawr

WRENN ID
salt-timber-juniper
Grade
II
Local Planning Authority
Isle of Anglesey
Constituency
Ynys Môn MP: Llinos Medi (PC)
Country
Wales
Date first listed
4 March 1998
Type
Boiling house, pigsty
Address
Boiling house and pigsty at Prysan-fawr, Bodedern
OS grid reference
SH 346 789
Coordinates
53.28157, -4.48158
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The boiling house and pigsty at Prysan-fawr is a single-storey structure dating from the 19th century. It features limewashed rubble walls and a pitched roof covered with old small slates that are grouted, along with an iron skylight. There is a brick chimney on the left (east) gable end and a door on the right (west) gable end. Attached to the left (east) gable end is a smaller shed made of rubble with a slate roof, which includes a pigsty at the eastern end of the range.

The boiling house consists of two bays and has a collared truss made of sawn timbers. The eastern gable contains a central brick fireplace, with a cast-iron boiler positioned in the corner to the left (north).

Local climate

Boiling house and pigsty at Prysan-fawr 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

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  • No EPC on record for this property
  • No sale records on file
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  • 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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