Roman Bridge is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 13 October 1966. House, shop.
Roman Bridge
- WRENN ID
- lapsed-gallery-violet
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 13 October 1966
- Type
- House, shop
- Address
- Roman Bridge, Penmachno Mill, Bro Machno, Conwy
- OS grid reference
- SH 806 529
- Coordinates
- 53.06016, -3.78198
- Source
- Cadw listing
Description
The Roman Bridge is a picturesque single-arched bridge made of rubble masonry, with a span of approximately 8 metres and a width of about 3 metres. It features vertical abutments constructed from flat slabs with splayed sides. The upper masonry has been removed down to the arch ring, and some cobbles remain on the decking.
Local climate
Roman Bridge sits in one of the wettest parts of the UK, with an average of 1,200 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 84% of listed buildings.
It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 27 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°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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