Hertford Castle
A 900-year-old castle gatehouse in the heart of Hertford — public gardens, Norman motte and centuries of royal history
A 900-year-old castle gatehouse in the heart of Hertford — public gardens, Norman motte and centuries of royal history
Founded by Edward the Elder in 912 to defend against the Danes, Hertford Castle has witnessed over a thousand years of English history. The young Elizabeth I spent much of her childhood here under the care of her governess, and the French King John II was held prisoner within its walls after his capture during the Hundred Years' War.
Today the Grade I listed Tudor gatehouse serves as Hertford Town Council offices, but the surrounding grounds are open daily as a free public garden. Visitors can explore the Norman motte, the 18th-century moat garden with its brick ice house, and the peaceful riverside setting along the River Lea.
Hertford Castle's story begins in 912, when Edward the Elder — son of Alfred the Great — built a fortified earthwork beside the River Lea to defend against Danish raids. After the Norman Conquest in 1066, William the Conqueror granted the site to Peter de Valognes, who constructed a motte-and-bailey castle on the Saxon foundations. Henry II transformed it between 1170 and 1174, adding a massive flint-and-stone curtain wall seven feet thick, drawbridges, gatehouses and a great hall.
The castle's royal connections run deep. Edward III granted it to his mother, Queen Isabella, in 1327. His fourth son, John of Gaunt, received the castle in 1360, incorporating it into the Duchy of Lancaster and marrying the Spanish Princess Constanza of Castile within its walls. During the Hundred Years' War, the French King John II was held here as a prisoner in considerable luxury.
The Tudor gatehouse, built by Edward IV between 1463 and 1465, dominates the site. Its crenellated brick facade is remarkably well preserved and now houses Hertford Town Council offices. While the interior is only accessible during scheduled open days and events, the exterior alone merits the visit. In the north-east corner, the Norman motte still rises 6.5 metres above the grounds — the oldest surviving feature, dating to just after the Conquest.
The castle grounds are the real draw for a casual visit. The moat garden, opened in 1951 in the dry medieval moat, features an 18th-century brick ice house built during the Marquis of Downshire's tenure. Seasonal planting, mature trees and the peaceful River Lea, busy with ducks and swans, make the gardens a pleasant spot to spend an hour. Fragments of the medieval curtain wall and a narrow 14th-century octagonal tower can be traced along the southern boundary.
Hertford is a straightforward day trip from London. Trains from Liverpool Street to Hertford East take around 50 minutes, with a half-hourly service, and the castle is a 10-minute walk from the station through the town centre. Hertford North station, served from Moorgate and Kings Cross, is an alternative at around 40 minutes but involves a slightly longer walk.
The town itself is worth exploring alongside the castle. The centre has a good mix of independent shops, cafes and pubs along the River Lea. St Andrew's car park, less than a minute from the castle gate, provides convenient parking for those arriving by car. Check the Hertford Town Council website for upcoming gatehouse open days if you want to see inside the building — they are scheduled throughout the year but are not a daily occurrence.
The castle grounds and gardens are completely free to enter. The gatehouse interior is open free of charge during scheduled open days and events throughout the year
The gatehouse interior is only open during scheduled events and open days. Check the Hertford Town Council website for upcoming dates before planning your visit.
Hertford East station has the most frequent service from London and is closer to the castle than Hertford North. Trains run every 30 minutes and take around 50 minutes.
The Norman motte in the north-east corner is easy to miss if you stick to the main lawns. Walk the full perimeter to see the motte, moat garden and curtain wall remains.
There is no cafe on site, but the grounds are ideal for a picnic beside the River Lea. Alternatively, Hertford town centre has plenty of cafes and pubs within five minutes.
The pay-and-display car park on St Andrew Street has 103 spaces and is less than a minute's walk from the castle entrance. It fills on weekends, so arrive early.
London Travel Writer · 12+ years covering UK attractions and tourism
Last reviewed: March 9, 2026
