11 Castle Ditch is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 22 May 1967. House, shop.
11 Castle Ditch
- WRENN ID
- fallen-spandrel-hawthorn
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 22 May 1967
- Type
- House, shop
- Address
- 11 Castle Ditch, Walled Town, Caernarfon, LL55 2AU
- OS grid reference
- SH 478 627
- Coordinates
- 53.13988, -4.27633
- Source
- Cadw listing
Description
11 Castle Ditch is a Georgian house and shop with two bays and three storeys, plus an attic. The exterior features roughcast walls and a slate roof with a moulded wooden eaves cornice. The lower storey includes a mid-20th century shop front with two segmental-headed windows that have been replaced in their original openings, along with a dentilled cornice. To the left, there are replaced double doors beneath a plain segmental-headed overlight. The middle and upper storeys have small renewed four-pane sash windows in their original openings, although the left window is not quite aligned. The attic louvres are rendered over and not visible from the outside.
At the rear, the building is constructed of rubble stone and features a two-storey roughcast lean-to and a single-storey L-shaped link to 16 Palace Street. This rear section is built on a stone boundary wall that defines earlier burgage plots.
Inside, original stairs with parallel flights are partially preserved in the upper storeys. The two-bay roof includes an early 19th-century collar-beam truss, though it has re-used collar and renewed purlins. The attic has louvres on the front elevation.
Local climate
11 Castle Ditch 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
- 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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