Tyn Twll is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 20 July 1995. Cottage. 1 related planning application.
Tyn Twll
- WRENN ID
- sheer-brass-martin
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 20 July 1995
- Type
- Cottage
- Address
- Tyn Twll, Bontddu, Llanelltyd, Gwynedd
- OS grid reference
- SH 676 189
- Coordinates
- 52.75209, -3.9628
- Source
- Cadw listing
Description
Tyn Twll is a vernacular one-and-a-half storey cottage dated 1754. It is constructed of rich iron-stone rubble and features a slate roof with a rubble gable parapet on the right side. The cottage has end chimneys with plain capping and weather-coursing. The entrance is off-centre to the right and has a modern part-glazed door. Above the door is an inscribed sandstone plaque displaying the date and initials IL P JI, which has been recently strengthened. There are 20th-century windows flanking the entrance; the left window has two panes, while the right window is a four-pane casement. Above these, there are three rubble gabled dormers, each with plain-glazed windows and plain bargeboards.
To the left, there is a 19th-century brick and rubble lean-to with a corrugated iron roof, featuring a boarded door and a four-pane sash window on the left side. To the right, there is a former dairy addition that has modern openings. The rear of the cottage is rendered and includes a modern window.
Inside, the hall and entrance lobby have beamed ceilings. The hall features a fireplace with a chamfered bressummer.
Local climate
Tyn Twll sits in one of the wettest parts of the UK, with an average of 1,420 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 95% of listed buildings.
It experiences an average of 32 freeze-thaw cycles a year, fewer than 58% of listed buildings. Of these, 16 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
Sign in or create a free account to unlock:
- No EPC on record for this property
- No sale records on file
- Related listed building consents — 1 application
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
this building 1 similar nearby listed buildings