Isfryn House is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 19 June 1990. House.
Isfryn House
- WRENN ID
- swift-clay-umber
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 19 June 1990
- Type
- House
- Address
- Isfryn House, Dolgellau, Gwynedd, LL40 1RH
- OS grid reference
- SH 727 176
- Coordinates
- 52.74171, -3.88689
- Source
- Cadw listing
Description
Isfryn House is a 1.5-storey, three-window house built with whitewashed roughcast on rubble masonry. It features a steeply pitched slate roof with plain eaves and close verges. The house has tall square stone stacks with moulded caps and water tabling.
On the top storey, there are three hipped dormers made of roughcast rubble with close eaves. The windows are Victorian sash style, with a two-light casement window on the ground floor to the left and a Victorian sash window to the right. The central doorway is framed by a late 19th-century closed, gabled trellis porch that has a slate roof and plain bargeboards on consoles. Above the four-panel door, which has glazed upper panels, is a shallow rectangular fanlight.
Inside, the house retains many worn and largely cased stop-chamfered ceiling beams and plain joists. Although the plan form has been altered, a narrower bay in the centre opposite the door suggests the presence of a passage.
Local climate
Isfryn House sits in one of the wettest parts of the UK, with an average of 1,340 mm of rain a year. This makes it wetter than 96% 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 34 freeze-thaw cycles a year, more than 52% of listed buildings. Of these, 17 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 — 3 transactions since 2005
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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