Pen-Hesgyn-Isaf is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 5 February 1952. House.
Pen-Hesgyn-Isaf
- WRENN ID
- stranded-mullion-summer
- 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
- Pen-Hesgyn-Isaf, Llansadwrn, Penmynydd
- OS grid reference
- SH 538 742
- Coordinates
- 53.2453, -4.19187
- Source
- Cadw listing
Description
Pen-Hesgyn-Isaf is a two-storey house with four windows. The walls are grey grit rendered, resting on boulder foundations. It features recessed sash windows with glazing bars. The older section of the house has a roof made of small old slates, while the later section has a roof of thin slates and includes a sculptured head with a date. Although not inspected recently, an earlier description indicates that the older part of the house has a wide fireplace, hewn beams, and rough chamfered joists.
Local climate
Pen-Hesgyn-Isaf sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% 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 23 freeze-thaw cycles a year, fewer than 75% of listed buildings. Of these, 11 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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