Ardd Las / Efail Rhos is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 26 June 1998. House.
Ardd Las / Efail Rhos
- WRENN ID
- third-solder-onyx
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 26 June 1998
- Type
- House
- Address
- Ardd Las / Efail Rhos, Rhoshirwaun, Pwllheli, Aberdaron
- OS grid reference
- SH 195 293
- Coordinates
- 52.83156, -4.67981
- Source
- Cadw listing
Description
Ardd Las, also known as Efail Rhos, is a cottage and former smithy dating from the 18th century. The building is pebbledashed and features a single slate roof with three pebbledashed chimneys, two located on the ridge and one at the left end. The cottage section on the left has a 6-pane sash window on each side of a framed ledged door. The smithy section includes a metal window and large double doors, with a stable door to the right.
The interior of the cottage has seen little alteration since the early 20th century. It includes ladder access to the loft, which has a door fitted with blacksmith-made hinges. There is a large fireplace with an iron grate and two doors in a painted timber partition beneath the loft.
Local climate
Ardd Las / Efail Rhos sits in one of the wettest parts of the UK, with an average of 1,460 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It averages fewer than one freeze-thaw cycle a year. Average temperatures at this location have risen by 0.2°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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