Maes Mawr is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 21 July 2000. House.
Maes Mawr
- WRENN ID
- pitched-plinth-thunder
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 21 July 2000
- Type
- House
- Address
- Maes Mawr, Llanllyfni, Caernarfon
- OS grid reference
- SH 474 514
- Coordinates
- 53.03809, -4.27653
- Source
- Cadw listing
Description
Maes Mawr is a single-storey building with a two-room layout, featuring a former cowhouse attached to the left gable end and later lean-tos on the left and rear sides. The exterior is made of painted, roughly coursed rubblestone, topped with a slate roof that has an integral end stack on the right and a roughly central ridge stack at the junction with the former cowhouse. The building has three renewed 16-paned sash windows, two located on the left and one to the right of the entrance, all with slate cills. There is a gabled open porch that includes a round-headed outer arch and an inner plank door.
Inside, the two-room plan retains a plank screen immediately to the left of the entrance in the larger room.
Local climate
Maes Mawr sits in one of the wettest parts of the UK, with an average of 1,610 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It experiences an average of 11 freeze-thaw cycles a year, fewer than 89% of listed buildings. Of these, 4 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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