Glanrafon Fawr is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 29 July 1997. House.

Glanrafon Fawr

WRENN ID
low-bonework-sable
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
29 July 1997
Type
House
Address
Glanrafon Fawr, Llanfaglan, Caernarfon, Bontnewydd
OS grid reference
SH 470 596
Coordinates
53.11245, -4.28602
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Glanrafon Fawr is a building featuring lined unpainted stucco and a slate close-eaved roof with rendered end stacks. The left end is stuccoed, while the right end and rear are constructed from rubble stone. It is a three-storey structure with a three-window range, including 6-pane attic windows and 12-pane windows elsewhere, with horned sashes on the first floor. The central entrance has a door with an overlight, and there is a 20th-century 15-paned glazed door set in a simple timber surround. The rear of the building is also three-storey, with 6-pane windows at the top, a 20th-century casement window on the first floor to the left, and 8-pane and 12-pane horned sashes. There is a single-storey whitewashed extension to the centre and left, a 20th-century window to the right, and a lean-to at the rear end.

Local climate

Glanrafon Fawr sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.

It experiences an average of 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 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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