Pont Helygog is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 26 May 1995. Water tower.
Pont Helygog
- WRENN ID
- western-courtyard-nettle
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 26 May 1995
- Type
- Water tower
- Address
- Pont Helygog, Brithdir and Llanfachreth, Gwynedd
- OS grid reference
- SH 790 196
- Coordinates
- 52.76067, -3.79309
- Source
- Cadw listing
Description
Pont Helygog is a bridge constructed from rubble, featuring an earlier irregular battered platform built with boulders on rock. It has a simple segmental arch and uncoped parapet walls. The parapet wall on the right side (south) has an almost S-shaped irregularity. The carriageway is unmetalled.
Local climate
Pont Helygog sits in one of the wettest parts of the UK, with an average of 1,310 mm of rain a year. This makes it wetter than 95% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.
It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 26 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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