Twr Gwynllan is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 19 October 1971. Holiday accommodation.
Twr Gwynllan
- WRENN ID
- tenth-pediment-pigeon
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 19 October 1971
- Type
- Holiday accommodation
- Address
- Twr Gwynllan, Brynkir, Dolbenmaen, Gwynedd
- OS grid reference
- SH 522 434
- Coordinates
- 52.96781, -4.20086
- Source
- Cadw listing
Description
Twr Gwynllan is a building constructed with red ashlar sandstone on the lower part and a greyer version of the stone on the upper floors. It has a square plan with chamfered corners and is set on a square podium, which is accessed from the north side by five splayed steps leading to a two-centred arched entrance. The entrance features diagonally battened doors with elaborate iron hinges. The floors are separated by prominent square string courses. Each floor includes similar arched Gothick three-light windows made of timber, showcasing curvilinear uncusped tracery without hood mouldings. The short corner angles display a variety of blind arrow-loops on each floor and rise to a recessed panelled merlon that is taller than the crenellated parapet of the walls. The building was converted into holiday let accommodation and decorated by Mrs. F Williams in 1996.
Local climate
Twr Gwynllan sits in one of the wettest parts of the UK, with an average of 1,550 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 20 freeze-thaw cycles a year, fewer than 79% of listed buildings. Of these, 8 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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