Certain |
Possible |
Questionable Doubtful |
Rejected |
|
Confidence is a statement of the site as a medieval fortification or palace |
| Name | Alternative Name(s) | Type | Remains |
| Anstey Castle | Anstey Hall; Anestie; Anesty | Timber Castle Masonry Castle |
Masonry footings |
| Anstey Hales Farm | Hales Hill | Timber Castle Fortified Manor House |
Earthworks | Anstey Village Defences | Urban Defence | Earthworks |
| Ardeley Bury moated site | Timber Castle Fortified Manor House |
Earthworks | |
| Ashridge palace | Palace | Masonry ruins/remnants | |
| Barrowfield, Great Amwell | Gallows Plain | Timber Castle | Earthworks |
| Benington Castle | Bennington; The Lordship; Benyngton | Timber Castle Masonry Castle |
Masonry footings | Benington Village Defences | Bennington | Urban Defence | Earthworks |
| Berkhamsted Castle | Berkhampstead; Berkhamstead; Great Berkhamsted | Timber Castle Masonry Castle |
Masonry ruins/remnants | Berkhamsted Seigeworks | Siege Work | Earthworks | Brent Pelham, Cole Green | Timber Castle | Earthworks | Broxbourne Manor of the Bishop of London | Palace | Nothing visible | Buckland moat | Timber Castle Fortified Manor House |
Earthworks | Bygrave House | Masonry Castle Fortified Manor House |
Earthworks | Clothall Castle | Timber Castle | Earthworks |
| Danesbury, Hertford | Warren Field | Timber Castle | Cropmarks/slight earthworks |
| Golden Parsonage, Great Gaddesden | Timber Castle | Earthworks | Great Munden | Roughground Wood; Levens Green | Timber Castle | Cropmarks/slight earthworks |
| Hadham Hall | Palace | Nothing visible | |
| Hatfield; The Palace | Old Palace | Palace | Major |
| Hertford Castle | Hartford | Timber Castle Masonry Castle Palace |
Masonry ruins/remnants | Hertford Town Defences | Urban Defence | Nothing visible | Hoddesdon Bury Cock Lane mound | Broxbornebury Park | Timber Castle | Earthworks | Hunsdon House | Honesdon; Hunsdon Tower | Tower House Palace |
Masonry ruins/remnants | Kings Langley Hunting Lodge | Palace | Earthworks | Kings Langley Royal Palace | Palace | Earthworks | Kingsbury Castle, St Albans | Timber Castle | Cropmarks/slight earthworks | Little Gaddesden Church Meadow earthworks | Timber Castle Fortified Manor House |
Cropmarks/slight earthworks |
| Little Hadham, Cailes Castle | Uncertain | Cropmarks/slight earthworks | Little Hadham, North of Hadham Hall | Timber Castle | Earthworks | Much Hadham; The Palace | Bishop's Folly | Palace | Major | Nuthampstead; The Warren | Timber Castle | Cropmarks/slight earthworks |
| Pains End, Anstey | Fortified Manor House | Earthworks | Periwinkle Hill, Barkway | Periwinkle Hall; Reed | Timber Castle | Cropmarks/slight earthworks | Pirton Grange | Fortified Manor House | Earthworks |
| Pirton Toot Hill | Timber Castle | Earthworks | Pirton Village Defences | Urban Defence | Cropmarks/slight earthworks |
| Preston Castle, Hertfordshire | Castle Farm | Masonry Castle | Nothing visible |
| Rennesley Garden Wood, Hertfordshire | Rennesley Gardenwood; Wadesmill; Standon | Timber Castle | Cropmarks/slight earthworks | Rickmansworth; The More | Manor of the More; Rykmersworth; Moor Park | Fortified Manor House Palace |
Nothing visible |
| Rye House, Stanstead Abbots | Fortified Manor House | Major | Sandon; The Mount | Timber Castle | Earthworks |
| St Albans Abbey | Great Gatehouse | Fortified Ecclesiastical site Palace |
Masonry ruins/remnants |
| St Albans Town Defences | Monk Ditch | Urban Defence | Nothing visible |
| Therfield Castle | Tuthill | Timber Castle | Earthworks | Therfield Village Defences | Urban Defence | Earthworks |
| Totteridge Manor of the Bishop of Ely | Palace | Earthworks | Tyttenhanger Palace | Tyttenhangar; Tytenhanger | Palace | Nothing visible |
| Walkern Bury | Bassus Green | Timber Castle Masonry Castle |
Cropmarks/slight earthworks |
| Waytemore Castle, Bishops Stortford | Weytemore; Storteford; Estorteford | Timber Castle Masonry Castle Palace |
Masonry footings | Well and Chapel Woods, Watton | Danesfield | Timber Castle | Earthworks |
| Wheathampstead | Castle Meadows; Creswell Farm | Timber Castle | Nothing visible | Widford Barrow Hill | Timber Castle | Earthworks |
| Wymondley Castle | Great Wymondley | Timber Castle | Earthworks |