Gwerniago is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 25 May 2000. House. 3 related planning applications.
Gwerniago
- WRENN ID
- dusk-rubble-coral
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 25 May 2000
- Type
- House
- Address
- Gwerniago, Pennal, Machynlleth, Gwynedd, SY20 9JX
- OS grid reference
- SH 712 002
- Coordinates
- 52.58459, -3.90184
- Source
- Cadw listing
Description
Gwerniago is a house built of rubble and whitewashed, with a slate roof and gable stone stacks. The main part of the house dates to an unknown period, with two storeys and three bays. To the left, a lower, one-and-a-half-storey range adjoins it. The central entrance has a part-glazed door with a five-pane overlight, and there are 12-pane sash windows with unhorned glass to the right, and three similar windows to the first floor. A larger 16-pane sash window is located to the left of the entrance door on the ground floor. All windows have painted timber lintels. The service building has a door and a small window, both under a timber lintel, and a tall gable-end stack. The rear elevation is rendered and has two window bays. A modern extension with a flat roof extends across the full length of the ground floor.
Local climate
Gwerniago sits in one of the wettest parts of the UK, with an average of 1,320 mm of rain a year. This makes it wetter than 95% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.
It experiences an average of 31 freeze-thaw cycles a year, fewer than 62% of listed buildings. Of these, 15 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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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 5 transactions since 2012
- Related listed building consents — 3 applications
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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