British Listed Buildings

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Portchester Castle, Portchester

Description: Portchester Castle

Grade: I
Date Listed: 18 October 1955
English Heritage Building ID: 141469

OS Grid Reference: SU6241104667
OS Grid Coordinates: 462411, 104667
Latitude/Longitude: 50.8382, -1.1150

Location: Waterside Lane, Fareham, Hampshire PO16 9QR

Locality: Portchester
Local Authority: Fareham Borough Council
County: Hampshire
Country: England
Postcode: PO16 9QR

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This building is also a scheduled monument.

Listing Text

(South End)
Portchester Castle
SU 6204 11/203 18.10.55.


A Scheduled A.M, in the care of the Department of the Environment. The main walls are those of the Roman fort Portus Adurni built in the late C3 or early C4. They form a square 200 yds wide and enclose between 8 and 9 acres. They are of flints with bonding courses of brick or stone, but have been substantially repaired in the mediaeval period. Originally there were hollow semi-circular bastions in the angles and 4 on each side. Of these 20 bastions, 14 survive. The entrances were in the centre of the west and east sides, but the gateways now standing are both mediaeval. Of the west or land gate, the lower storey is C12, ashlar, with a 3-centred archway and originally stone vaulting to the roof but this has mostly fallen away.
The upper portion is C14, stone rubble, and has 1 window containing 2 tiers of
3 lights on the inner side and 2 corbel heads above the cornice. The east or watergate is a shell divided into 2 sections with an archway between. It is faced with ashlar.
The outer portion is C14 and has a portcullis groove to the archway. The inner
portion is older and has a circular turret staircase in the south west corner.
In the north west corner of the Roman fort a mediaeval castle was built in the
reign of Henry II with a massive keep in the angle of the Roman walls, which were
cut away by a surrounding wall on the east and south sides forming an inner bailey with a projecting tower in the south east corner and a gateway in the south wall with a moat to the south and east filled with water at high tide by a sluice in the Roman wall. The keep, which projects beyond the Roman walls, is intact. It is 40 ft square and the walls are 8 ft thick. The 3 original storeys were built about 1160 and the 4th storey added in the early C13. The remaining buildings are now ruined. Those along the west and south walls of the inner bailey and Assheton's Tower in the north west corner were erected in the C14 and those to the south of the latter along the west wall in the C17. Photographs in the N.M.R. and article in Country Life, Volume 75.
Portchester Castle forms a group with St Mary's Church, the Churchyard walls, the
lamp in the Churchyard and the lychgate.

Listing NGR: SU6222404655

This text is a legacy record and has not been updated since the building was originally listed. Details of the building may have changed in the intervening time. You should not rely on this listing as an accurate description of the building.

Source: English Heritage

Listed building text is © Crown Copyright. Reproduced under licence.