Railway Viaduct (partly in Llanllechid community) is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 9 March 2000.

Railway Viaduct (partly in Llanllechid community)

WRENN ID
dreaming-gargoyle-spring
Grade
II
Local Planning Authority
Gwynedd
Constituency
Bangor Aberconwy MP: Claire Hughes (Lab)
Country
Wales
Date first listed
9 March 2000
Address
Railway Viaduct (partly in Llanllechid community), Tre-Felin, Llandygai
OS grid reference
SH 601 706
Coordinates
53.21469, -4.09558
Source
Cadw listing

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

Local climate

Railway Viaduct (partly in Llanllechid community) 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 90% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 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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Nearby listed buildings

  1. Former Sawmill Manager's House Grade II 80 m
  2. Tre-felin Cottages Grade II 88 m
  3. Tre-felin Cottages Grade II 94 m
  4. Tre-felin Cottages Grade II 103 m
  5. Railway Viaduct (partly in Llandygai community) Grade II 108 m
  6. Tre-felin Cottages Grade II 109 m
  7. Tre-felin Cottages Grade II 116 m
  8. Tre-felin Cottages Grade II 124 m
  9. Tre-felin Cottages Grade II 131 m
  10. Tre-felin Cottages Grade II 140 m