Ty Mawr is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 30 January 1968. House.
Ty Mawr
- WRENN ID
- seventh-frieze-grain
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 30 January 1968
- Type
- House
- Address
- Ty Mawr, Llanfihangel Din Silwy, Llanddona
- OS grid reference
- SH 589 814
- Coordinates
- 53.31109, -4.11831
- Source
- Cadw listing
Description
Ty Mawr is an 18th-century, two-storey house featuring two windows and a wing to the north. The exterior is made of roughly coursed masonry with large angle stones, topped by a roof of graduated large slates. It has a rectangular chimney, which is square and squat, complete with dripstones and capping, and rough gable coping. The ground floor windows, along with the entrance that includes a transom light with small panes, have heads formed with voussoirs. The first-floor windows are casements. The interior was not seen during the survey.
Local climate
Ty Mawr 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 90% of listed buildings.
It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 1 transaction since 2015
- 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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