Hen-gau is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 6 December 1999. House.
Hen-gau
- WRENN ID
- ghost-screen-khaki
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 6 December 1999
- Type
- House
- Address
- Hen-gau, Aberllefenni, Machynlleth, Corris, Gwynedd
- OS grid reference
- SH 758 110
- Coordinates
- 52.68306, -3.83865
- Source
- Cadw listing
Description
Hen-gau is a three-storey building constructed of coursed stone on an outsetting plinth, topped with a slate roof featuring gable end stacks. The front facade has three window bays, which reduce to two storeys at the rear. It features a central glazed door with a plain overlight, and 12-paned sash windows on both the ground and first floors, some of which are horned, along with slate sills and lintels. The attic floor has 6-paned single sash windows beneath a boxed eaves. The left gable end is rendered.
Inside, the front door leads to a through stair hall that culminates in a scrolled dog-leg stair with stick balusters. The kitchen is located to the right. The main doors are adorned with bold architraves that have rosettes at the corners.
Local climate
Hen-gau sits in one of the wettest parts of the UK, with an average of 1,290 mm of rain a year. This makes it wetter than 94% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.
It experiences an average of 41 freeze-thaw cycles a year, more than 79% of listed buildings. Of these, 22 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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