He was greatly honoured after the Norman Conquest, and received as his reward over a hundred manors in central England from the king.
In 1086, the Domesday Book records William as holding the substantial number of 162 manors, forming collectively the Honour of Peverel, in Nottinghamshire and Derbyshire, including Nottingham Castle.
William Peverel is amongst the people explicitly recorded in the Domesday Book as having built castles.
[6] William possibly served as the Constable of Dover Castle very briefly following the death of Bertram Ashburnham during or after the Battle of Hastings.
He would hold the position no later than December 25, 1066 as Odo de Bayeux became Earl of Kent shortly after William the Conquerer's corronation.