Gelli is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 24 May 2000. Building.
Gelli
- WRENN ID
- errant-entrance-blackthorn
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 24 May 2000
- Type
- Building
- Address
- Gelli, Tyn Lon, Tregarth, Bangor, Llandygai
- OS grid reference
- SH 598 681
- Coordinates
- 53.19158, -4.09851
- Source
- Cadw listing
Description
Gelli is a single-storey building with a linear shape, oriented roughly north-south. The larger section is on the right (south) side, while the left side features a slightly lower single-room area. The building is constructed from roughly coursed rubblestone and has a slate roof with purple brick coping on the main part. On either side of an offset boarded door, which is sheltered by a bracketed lean-to hood, there are 4-paned casement windows with slate cills. The left section includes a 12-paned sash window next to a boarded door, along with a rendered integral end stack. There is a small 20th-century extension at the rear. The interior was not accessible during the survey.
Local climate
Gelli 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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