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Deganwy Castle

A Grade II* Listed Building in Llandudno Junction, Conwy

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Latitude: 53.2979 / 53°17'52"N

Longitude: -3.8287 / 3°49'43"W

OS Eastings: 278223

OS Northings: 379438

OS Grid: SH782794

Mapcode National: GBR 1ZP9.XJ

Mapcode Global: WH654.5C2M

Plus Code: 9C5R75XC+4G

Entry Name: Deganwy Castle

Listing Date: 23 September 1950

Last Amended: 5 May 2006

Grade: II*

Source: Cadw

Source ID: 3365

Building Class: Defence

Location: Set across 2 steep hills known as The Fardre inland from the village, with panoramic view across Conwy, estuary, coastline and N Wales mountains.

County: Conwy

Community: Conwy

Community: Conwy

Locality: Deganwy

Built-Up Area: Llandudno Junction

Traditional County: Caernarfonshire

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Although it was a defended site from the early medieval period, extant masonry remains of Deganwy Castle belong to building campaigns of the C13, during which time it was held alternately by both Welsh and English forces. The earliest part of the present structure is the revetment on the N side, of c1213 built by Llywelyn ap Iorwerth. The remainder of exposed masonry was added in the period 1245-54, when the castle was substantially rebuilt by Henry III, but not completed. It was captured in 1263 by Llywelyn ap Gruffudd. When Edward I seized control over the area in 1283 he chose not to rebuild Deganwy but to build a new castle at Conwy.


A fortification between 2 steep hillocks, with bailey between them. The former S entrance retains a short section of rubble-stone wall close to the former gatehouse, and other footings of the wall are also visible. On the N side is a bank and ditch, and a short section of a rubble-stone wall at R angles, probably part of a gateway, although the N wall was never completed. The W hillock retains traces of mid C13 curtain wall to the S and E, with a more substantial earlier surviving section to the NW corner. Here there is the base of a round turret and, at a lower level, a substantial retaining wall, both of coursed rubble stone. No structures are now visible on the E hillock, where Mansells Tower formerly stood.

Reasons for Listing

Listed grade II* as ruins of an early medieval castle, the most important defensive site in the area before the construction of Conwy Castle.
Scheduled Ancient Monument CN016

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Other nearby listed buildings

  • II Brackenrigg
    Reached by a short drive on the E side of Gannock Park. Brackenrigg stands on the lower slopes directly below Deganwy Castle.
  • II Coed y Castell
    Set back from the road approximately 200m NE of the junction with Gannock Road.
  • II Gates & gate piers at entrance to Coed y Castell
    Fronting the road on the W side of the house.
  • II Venezia
    One of a pair of commercial buildings fronting the street opposite Deganwy Station.
  • II* Church of All Saints
    Set against a steep hillside behind the seafront houses near Deganwy Pier, beyond a short lane off the A546.
  • II Sunnyside and Cafe T'air
    One of a pair of commercial buildings fronting the street opposite Deganwy Station.
  • II Gorse Bank and Townstyle
    One of a pair of commercial buildings fronting the street opposite Deganwy Station.
  • II Bryn Gosal

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