Elernion is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 19 October 1971. House.
Elernion
- WRENN ID
- western-garret-flax
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 19 October 1971
- Type
- House
- Address
- Elernion, Trefor, Caernarfon, Llanaelhaearn, LL54 5AA
- OS grid reference
- SH 377 463
- Coordinates
- 52.98991, -4.41819
- Source
- Cadw listing
Description
Elernion is a house that has been divided into two separate tenancies. It is constructed from uncoursed and whitewashed stone rubble on boulder foundations, topped with slate roofs. The building has two storeys and features a fragmentary 2-bay north-south block with a prominent lateral stack located centrally on its east side. Attached to the south gable end is another 2-bay north-south block, which is offset to the east, along with an east-west block set in the angle to the west, with a lean-to room positioned between this block and the main stack.
The earlier block includes a small square bay window and a large stone stack with diagonal shafts that project at the rear. The roof, which dates from 1801, includes a rooflight at the rear. The main entrance door is located on the left side (south) and is accompanied by 4-pane sash windows. The south block features a small inserted cellar at the north end, large metal-framed and uPVC windows, and gable stacks. There are projecting stones embedded in the walls, some of which may have been used as mounting aids.
At the rear of the south block, there is a small paned window on the upper floor, along with a later single-storey and attic range positioned at right angles, as well as additional lean-to structures. The large fireplace associated with the main stack has been infilled with a late 19th-century fireplace. Inside the cellar, there are light recesses and the base of a large circular stair located in the southwest corner of the block.
Local climate
Elernion sits in one of the wettest parts of the UK, with an average of 1,710 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It experiences an average of 7 freeze-thaw cycles a year, fewer than 95% of listed buildings. Of these, 2 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
- Sale history — 1 transaction since 2016
- 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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