Tyn yr Allt is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 23 January 2003. House.
Tyn yr Allt
- WRENN ID
- frozen-copper-laurel
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 23 January 2003
- Type
- House
- Address
- Tyn yr Allt, Penmynydd, Llanfairpwllgwyngyll
- OS grid reference
- SH 518 735
- Coordinates
- 53.23791, -4.22103
- Source
- Cadw listing
Description
Tyn yr Allt is a linear range of house built in two distinct phases, with a lofted cartshed on the left and a low cow-house on the right. The house is constructed of lime-rendered rubble and features grouted slate roofs, although part of the cow-house roof has been renewed. The original dwelling consists of a two-unit, one and a half-storeyed range with end chimneys, the left chimney being larger. It has an off-central entrance with a boarded door, flanked by 16-pane sash windows, and 12-pane sashes above that break through the eaves in catslide dormers. The higher addition on the right is a single bay, possibly once a separate dwelling, with a doorway to the left and a 4-pane sash window on each floor to the right, along with a gable end stack. The single-storey cow-house range to the right appears to have been built in two phases, as indicated by the roof, which is divided into two sections by slated copings, and it features three simple doorways. The cartshed beyond the original house has a timber lintel over a boarded door. The interior was not inspected during the survey.
Local climate
Tyn yr Allt sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.
It experiences an average of 23 freeze-thaw cycles a year, fewer than 75% of listed buildings. Of these, 11 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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