5 Castle Street is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 8 October 1953. House. 1 related planning application.
5 Castle Street
- WRENN ID
- twelfth-brick-owl
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 8 October 1953
- Type
- House
- Address
- 5 Castle Street, Walled Town, Caernarfon, LL55 1SE
- OS grid reference
- SH 478 627
- Coordinates
- 53.14048, -4.27659
- Source
- Cadw listing
Description
5 Castle Street is a late Georgian house featuring three bays and three storeys, constructed from coursed dressed stone with a replaced hipped slate roof. The lower storey has a slightly projecting plinth below the sill level. The wide central doorway has a round head with prominent voussoirs and a radial-glazed overlight, although the door itself has been replaced. The windows have flat heads with voussoirs, and the middle and upper storeys include sill bands. The ground floor has 12-pane horned sash windows, while the first and second storeys feature similar 9-pane windows.
The left side wall facing Castle Street has two bays, with tripartite horned sash windows on the left and a shallow broad canted bay on the right that incorporates 12-pane horned sash windows. At the left end, there is a round-headed doorway with a replaced door that is recessed and accessed by steps, leading to a through passage beneath the upper storeys. The right side wall retains sash windows but has an added two-storey wing, which is a separate property known as Plas Llanwnda.
The interior has been modernised and the layout altered, but remnants of the original plan remain, including a central entrance hall and principal rooms on the right and left.
Local climate
5 Castle Street 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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- No EPC on record for this property
- No sale records on file
- 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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