Tan y Graig is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 4 November 1999. House.
Tan y Graig
- WRENN ID
- turning-flint-woodpecker
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 4 November 1999
- Type
- House
- Address
- Tan y Graig, Fachwen, Caernarfon, Llanddeiniolen
- OS grid reference
- SH 575 617
- Coordinates
- 53.13391, -4.13147
- Source
- Cadw listing
Description
Tan y Graig is a single-storey building with a three-room layout, oriented roughly east-west. It is constructed from limewashed, irregularly coursed rubblestone and features a slate roof. The front of the building has four-paned sash windows with slate cills on either side of an offset boarded door. To the right of the door, there are two additional four-paned sash windows. The two sections of the front are separated by a ridge stack, which, along with the two integral end stacks, is rendered with slate drips. At the rear, there is a lean-to, and another lean-to is located on the right gable end, both topped with a sheet roof. The interior was not inspected at the time of the survey.
Local climate
Tan y Graig sits in one of the wettest parts of the UK, with an average of 1,360 mm of rain a year. This makes it wetter than 96% 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 40 freeze-thaw cycles a year, more than 78% of listed buildings. Of these, 22 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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