Efallon (also known as Lodge Fach) is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 20 November 1989. Lodge.

Efallon (also known as Lodge Fach)

WRENN ID
ruined-cellar-holly
Grade
II
Local Planning Authority
Snowdonia National Park
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
20 November 1989
Type
Lodge
Address
Efallon (also known as Lodge Fach), Arthog, Gwynedd
OS grid reference
SH 644 145
Coordinates
52.71177, -4.00831
Source
Cadw listing

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

Description

Efallon, also known as Lodge Fach, is a single-storey structure built from rubble, featuring a steep slate roof with high gable parapets, broad kneelers, and weather coursing. It has an off-centre rubble chimneystack topped with a cornice. The front, which faces the road, has three bays, including a half-glazed doorway positioned below the stack, flanked by tall, narrow windows that have unusual triangular heads and monolithic stone jambs, reminiscent of Anglo-Saxon design. A rubble terrace is located at the front. The tall, narrow openings are also found at the gables on the end walls, but these are blind. To the right gable, there is a 6-pane casement window featuring a curious label that is inversely returned. A date plaque is situated on the left gable above a wide depressed arched opening, which has a keystone and imposts but is now infilled. Above this opening is a recessed Tudor arch over a 12-pane sash window with a slate cill. There is a modern extension to the rear and southwest that is not included in this description. Inside, the open roof features tie beams and through purlins, along with lightly chamfered beams and low boarded doors.

Local climate

Efallon (also known as Lodge Fach) sits in one of the wettest parts of the UK, with an average of 1,390 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 95% of listed buildings.

It experiences an average of 28 freeze-thaw cycles a year, fewer than 69% of listed buildings. Of these, 13 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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  • Sale history — 4 transactions since 2008
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  • 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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