Tyn Twll is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 28 May 1999. Cottage.
Tyn Twll
- WRENN ID
- sleeping-floor-ochre
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 28 May 1999
- Type
- Cottage
- Address
- Tyn Twll, Moel Tryfan, Caernarfon, Llanwnda
- OS grid reference
- SH 507 564
- Coordinates
- 53.08476, -4.23045
- Source
- Cadw listing
Description
Tyn Twll is a single-storey cottage, likely designed with a three-room layout, oriented roughly east-west. It features a nearly full-length lean-to at the rear. The exterior is constructed of limewashed rubblestone and has a slate roof, which includes an integral end stack on the right and a larger ridge stack to the left of the center. The front of the cottage has six-paned sash windows on either side of a slightly offset plank door located to the right of the ridge stack, with two additional six-paned sash windows to the left. All windows are fitted with slate cills. The interior was not accessible during the survey.
Local climate
Tyn Twll sits in one of the wettest parts of the UK, with an average of 1,380 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 25 freeze-thaw cycles a year, fewer than 73% of listed buildings. Of these, 12 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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