Llys Twrog is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 30 November 1966. House.
Llys Twrog
- WRENN ID
- pale-paling-kestrel
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 30 November 1966
- Type
- House
- Address
- Llys Twrog, Maentwrog, Gwynedd
- OS grid reference
- SH 664 404
- Coordinates
- 52.94515, -3.98874
- Source
- Cadw listing
Description
Llys Twrog is a two-storey house built in the Georgian style, typical of the estate from this period. The structure is made of coursed rubble masonry, featuring large stones as quoins and lintels. It has a roof covered with small old slates, complete with stone copings and rectangular gable stacks that have dripstones and capping.
The main elevation faces north and consists of a three-window range with a central doorway situated under a gabled porch. The porch has a slate roof supported by timber framing raised on stone plinths. The windows are hornless sashes, with the ground floor windows having 16 panes each, while the first floor features unequal sashes with 12 panes. On the east gable, there is a doorway offset to the left (south) and a 2-pane horned sash located in the gable apex.
The interior was not inspected during the survey conducted in June and July 2003.
Local climate
Llys Twrog sits in one of the wettest parts of the UK, with an average of 1,450 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.
It experiences an average of 36 freeze-thaw cycles a year, more than 60% of listed buildings. Of these, 18 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
- Sale history — 1 transaction since 1998
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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