Tros-y-gonfa is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 4 November 1999. House.
Tros-y-gonfa
- WRENN ID
- south-merlon-nightshade
- 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
- Tros-y-gonfa, Rhiwlas, Bangor, Llanddeiniolen
- OS grid reference
- SH 579 657
- Coordinates
- 53.16962, -4.12668
- Source
- Cadw listing
Description
Tros-y-gonfa is a single-storey building with a two-room plan, oriented roughly from north-east to south-west. The exterior is made of painted irregularly coursed rubblestone, with windows and doors highlighted in a darker color. It features a grouted graded slate roof with raised verges. The front of the building has a 16-paned sash window on the left and a 12-paned sash window on the right, which has a configuration of four over eight panes, positioned next to a slightly offset boarded door. There are integral end stacks, and a window in the right gable end suggests that there is a loft above the right room. The interior was not accessible during the survey.
Local climate
Tros-y-gonfa 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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- 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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