Isfryn is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 3 May 2002. Residential. 1 related planning application.
Isfryn
- WRENN ID
- winding-facade-oak
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 3 May 2002
- Type
- Residential
- Address
- Isfryn, 11 Church Street, Walled Town, Caernarfon, LL55 1SW
- OS grid reference
- SH 477 628
- Coordinates
- 53.1412, -4.27772
- Source
- Cadw listing
Description
Isfryn is a near symmetrical pair of three-storey terraced houses at 11-13 Church Street. The walls are constructed of scribed and painted roughcast, with a slate roof featuring deeply moulded and corbelled eaves and roughcast end stacks.
The houses present two main bays, though asymmetry is introduced by an additional bay on the left side of No 11. This extra bay incorporates a passage to the rear that was retained from an earlier school building on the site.
On the middle storey, the windows are framed by pilasters with fluted capitals, with a sill band below and string course above. The inner doorways have hipped canopies supported on deep moulded cornices and openwork iron brackets, featuring iron cresting and panelled soffits. Both doors are half-lit fielded-panel doors with replaced overlights.
The flanking bays contain two-storey canted bay windows articulated by thin colonnettes. In the lower storey, hipped roofs cover the smaller middle-storey windows, which themselves have hipped roofs forming aprons (though these are missing from No 13) with iron cresting. The lower-storey windows have transoms with leaded lights above them. The middle storey has wood-framed cross windows with casements, while other windows throughout are four-pane sashes. The upper storey windows are positioned outside the line of the bay windows below.
The left-hand bay of No 11 features a chamfered doorway to a boarded door with iron studs and an inserted glazed panel, set under a moulded cornice on corbels. Above the doorway is a blank panel, with sash windows serving the middle and upper storeys.
At the rear, a lower two-storey gabled wing extends from the main structure, fitted with four-pane sash windows.
Local climate
Isfryn sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 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 — 2 transactions since 2004
- Related listed building consents — 1 application
- 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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