Penlan including attached cottage formerly known as Dwyfor. is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 30 November 1966. Residential.
Penlan including attached cottage formerly known as Dwyfor.
- WRENN ID
- hidden-pier-azure
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 30 November 1966
- Type
- Residential
- Address
- Penlan including attached cottage formerly known as Dwyfor., Maentwrog, Gwynedd, LL41 4HN
- OS grid reference
- SH 665 405
- Coordinates
- 52.94545, -3.98823
- Source
- Cadw listing
Description
Penlan, formerly known as Dwyfor, is a substantial house built in the early 19th century, reflecting the Georgian architectural tradition. The structure features coursed rubble masonry, with the main facade showcasing coursed blockwork, large stones used as quoins, and lintels. It has a slate roof with deep overhanging eaves.
On the left side (north), the house is a two-storey, three-window range that includes a central doorway and 16-paned hornless sash windows with slate sills. The roof is adorned with rectangular stone gable stacks that have dripstones and capping.
To the right (south) is a two-storey wing that features a full-height bow on the left, which has French windows beneath a first-floor two-light casement window with a moulded label. The right side has a gabled front with two sash windows, where the first-floor windows are unequal in size. A slate-roofed verandah supported by timber piers runs across the front of the building. The entrance to the right-hand range is through a panelled door located on the left side of the south wall, with a window to the right. Above, there are windows set under the eaves, featuring moulded labels; to the right is an unequal sash window, and to the left is a blocked window.
The interior was not inspected during the survey conducted in June and July 2003.
Local climate
Penlan including attached cottage formerly known as Dwyfor. sits in one of the wettest parts of the UK, with an average of 1,450 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 96% of listed buildings.
It experiences an average of 36 freeze-thaw cycles a year, more than 60% of listed buildings. Of these, 18 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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