Lon-Isaf Gate is a Grade II* listed building in the Gwynedd local planning authority area, Wales. First listed on 3 March 1966. Gate.
Lon-Isaf Gate
- WRENN ID
- white-chancel-dew
- Grade
- II*
- Local Planning Authority
- Gwynedd
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 3 March 1966
- Type
- Gate
- Address
- Lon-Isaf Gate, Glasinfryn, Bangor, Llandygai
- OS grid reference
- SH 601 693
- Coordinates
- 53.2031, -4.09468
- Source
- Cadw listing
Description
Lon-Isaf Gate is a single-storey T-plan building dating from the 18th century. It is constructed of roughly coursed rubblestone, with some traces of limewash still visible, and features a hipped slate roof. The main section of the building is aligned north-south and has a splayed projection at the center, which is fronted by a lower pedimented section that serves as an entrance porch.
On either side of the splayed projection, there are horned 6-paned sash windows, while the right end wall has a blind window. The projection itself contains a 2-light 12-paned casement window in the right splay and a 6-paned sash window in the left splay. The pedimented porch features a boarded door to the right and blind windows to the left and front; the front window is segmental-arched and originally held a board listing the toll charges. A rendered ridge stack is located at the center of the main range. There is a 20th-century extension at the rear of the building. The interior was not accessible at the time of the survey.
Local climate
Lon-Isaf Gate 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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