Tunnel beneath Bangor Road at Plas Ty Coch is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 3 May 2002. Tunnel.
Tunnel beneath Bangor Road at Plas Ty Coch
- WRENN ID
- patient-buttress-azure
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 3 May 2002
- Type
- Tunnel
- Address
- Tunnel beneath Bangor Road at Plas Ty Coch, Caernarfon
- OS grid reference
- SH 490 643
- Coordinates
- 53.1546, -4.25894
- Source
- Cadw listing
Description
The tunnel beneath Bangor Road at Plas Ty Coch, dated 1807, provides access from the house to the farm buildings. It features a rubble stone wall with segmental brick arches supporting the vaulted tunnel. Above the arch, there is a thin freestone band that holds an octagonal stone tablet with the year 1807 in raised numerals. The northern approach from the house is lined with rubble-stone revetments.
Local climate
Tunnel beneath Bangor Road at Plas Ty Coch 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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