Certain |
Possible |
Questionable Doubtful |
Rejected |
|
Confidence is a statement of the site as a medieval fortification or palace |
| Name | Alternative Name(s) | County | Remains |
| John of Gaunts Hill, Sutton | Bedfordshire | Cropmarks/slight earthworks | Mere Castle | Hough Hall; Strethul | Cheshire | Earthworks |
| Castle Dore | Cornwall | Earthworks | |
| Cayl Castle | Cornwall | Uncertain | |
| Coombe Castle | Cornwall | ||
| Tregothnan | Cornwall | Major | |
| Aikton Castle, Great Salkeld | Little Salkeld | Cumberland | Masonry footings | Bishops Dyke, Dalston Barrs | Cumberland | Cropmarks/slight earthworks |
| Collinsons Castle | Cumberland | Nothing visible | Warthole Hall | Cumberland | Nothing visible |
| Hayne Castle | Haine | Devon | Nothing visible |
| Higher Walland, Milton Damerel | Devon | Earthworks | |
| Mamhead | Devon | Nothing visible | |
| Slapton Ley Bridge defence | Devon | Nothing visible | |
| Topsham Fort | Devon | Earthworks | Bere Regis Palace | Court Green; Court Farm | Dorset | Nothing visible | Studland Castle | Hanfast Point | Dorset | Nothing visible |
| Castelhous, Mainsforth | Durham; County Palatinate of | Nothing visible | |
| Hamsterley Castles | The Castles | Durham; County Palatinate of | Earthworks |
| Jarrow | Durham; County Palatinate of | Nothing visible | Maiden Castle Fort, Durham | Durham; County Palatinate of | Cropmarks/slight earthworks |
| Haggerston Dovecote | Durham; North | Major | High Woolaston | Gloucestershire | Cropmarks/slight earthworks |
| Bythem | Hampshire | Uncertain | Castle Meadow, Pylewell | Hampshire | Nothing visible |
| Milford on Sea | Hampshire | Nothing visible | Castle of John of Evreux [d'Evreux] | Herefordshire | Uncertain |
| Weybridge Farm, Alconbury | Huntingdonshire | Earthworks | |
| Appledore | Apledore | Kent | Nothing visible |
| Graveney | Kent | Uncertain | Tower of Sir Edward Ringeley | Kent | Nothing visible |
| Woolwich | Kent | Nothing visible | |
| Cartmel Castle Meadows | Lancashire | Nothing visible | |
| Hermitage Hill, Conishead Priory | Lancashire | Uncertain | |
| Low Coppice Fort | Tilberthwaite | Lancashire | Cropmarks/slight earthworks |
| Kenninghall Castle | Norfolk | Earthworks | Wadenhoe Castle Close | Northamptonshire | Earthworks | Kilder | Castle of the Cout of Kielder; Cowt of Kielder | Northumberland | Cropmarks/slight earthworks |
| Brow Castle, Westbury | Brough Castle; Lower Newton Farm | Shropshire | Earthworks |
| Mawley | Shropshire | Nothing visible | |
| Melverley | Shropshire | Nothing visible | |
| Newport, Shropshire | Shropshire | Nothing visible | Cadbury Castle | Cadebi; Cadanbyrig; castri de Cadebir; Camalet; Camelot | Somerset | Earthworks |
| Heath House, Wedmore | Somerset | Nothing visible | Southwold Castle | Southwaude | Suffolk | Nothing visible | Goseford Castle | Surrey | Uncertain |
| Creake | Crech; Creche; Crek | Uncertain | Uncertain |
| Stippershull | Warwickshire | Uncertain | |
| Castle Folds | Castlesteads | Westmorland | Uncertain |
| Gilthwaiterigg, Kendal | Westmorland | Masonry ruins/remnants | |
| Helsfell Farmhouse | Westmorland | Uncertain | Silbury Hill | Selburie | Wiltshire | Earthworks |
| Castleford | Yorkshire | Nothing visible | Fervelton | Fernelton | Yorkshire | Nothing visible | Bedale Castle | Yorkshire North Riding | Nothing visible |