The start of the Norman Conquest was the Battle of Hastings, fought on 14 October 1066, although the battle itself took place 8 mi (13 km) to the north at Senlac Hill, and William had landed on the coast between Hastings and Eastbourne at Pevensey. It is thought that the Norman encampment was on the town’s outskirts, where there was open ground; a new town was already being built in the valley to the east. That “New Burgh” was founded in 1069 and is mentioned in the Domesday Book as such. William defeated and killed Harold Godwinson, the last Saxon King of England, and destroyed his army, thus opening England to the Norman conquest.

Hastings was shown as a borough by the time of the Domesday Book (1086); it had also given its name to the Rape of Hastings, one of the six administrative divisions of Sussex. As a borough, Hastings had a corporation consisting of a “bailiff, jurats, and commonalty”. By a Charter of Elizabeth I in 1589, the bailiff was replaced by a mayor.